แบ่งปันสำหรับน้องๆนักศึกษาที่ต้องการศึกษาและพัฒนาโปรแกรมด้วย VB โดย http://facebook.com/sinchaiza สินชัย ลานนท์

1. 1
Imports System.Data.SqlClient
Public Class FrmSaleProduct
Private Sub tsbtnAdd_Click(sender As Object, e As EventArgs) Handles tsbtnAdd.Click
Dim conn As SqlConnection
conn = New SqlConnection("Data Source = ISIN; Database=DBSale; integrated security=true")
If conn.State = ConnectionState.Open Then conn.Close()
conn.Open()
Dim strSql As String
strSql = "SELECT TOP 1 BillID FROM tb_Sale ORDER BY BillID DESC"
Dim da As New SqlDataAdapter(strSql, conn)
Dim ds As New DataSet
da.Fill(ds, "Sale") 'นำค่ำ da ใส่ใน ds ชื่อ product555
If ds.Tables("Sale").Rows.Count = 0 Then
txtBillid.Text = DateTime.Now.ToString("yy-MM") + "-" + "0001"
Else
Dim oldBillID As String = ds.Tables("Sale").Rows(0).Item("BillID").ToString().Substring(6)
Dim newBillID As String = (Convert.ToInt32(oldBillID) + 1).ToString("0000")
txtBillid.Text = DateTime.Now.ToString("yy-MM") + "-" + newBillID
End If

2. 2
conn.Close()
dtpSaleDate.Enabled = True
txtCustomerId.Enabled = True
btnSelectCustomer.Enabled = True
txtProductId.Enabled = True
btnSelectProduct.Enabled = True
txtAmount.Enabled = True
btnAddProductSale.Enabled = True
tsbtnSave.Enabled = True
tsbtnAdd.Enabled = False
End Sub
Private Sub btnSelectCustomer_Click(sender As Object, e As EventArgs) Handles btnSelectCustomer.Click
dgvSelectCustomer.Visible = True
Dim conn As SqlConnection
conn = New SqlConnection("Data Source = ISIN; Database=DBSale; integrated security=true")
If conn.State = ConnectionState.Open Then conn.Close()
conn.Open()
'If conn.State = ConnectionState.Open Then MessageBox.Show("Connection OK")
Dim strSql As String
strSql = "SELECT CustomerId, Name FROM tb_Customers"
Dim da As New SqlDataAdapter(strSql, conn)
Dim ds As New DataSet
da.Fill(ds, "Customers")
dgvSelectCustomer.DataSource = ds.Tables("Customers")
conn.Close()
dgvSelectCustomer.Columns(0).HeaderText = "รหัสลูกค้ำ"
dgvSelectCustomer.Columns(1).HeaderText = "ชื่อลูกค้ำ"
dgvSelectCustomer.Columns(0).Width = 100
dgvSelectCustomer.Columns(1).Width = 150
End Sub
Private Sub txtCustomerId_KeyUp(sender As Object, e As KeyEventArgs) Handles txtCustomerId.KeyUp
Dim conn As SqlConnection
conn = New SqlConnection("Data Source = ISIN; Database=DBSale; integrated security=true")
If conn.State = ConnectionState.Open Then conn.Close()
conn.Open()

3. 3
Dim strSql As String = "SELECT CustomerId, Name FROM tb_Customers Where CustomerID = '" + txtCustomerId.Text + "'"
Dim da As New SqlDataAdapter(strSql, conn)
Dim ds As New DataSet
da.Fill(ds, "Customers") 'นำค่ำ da ใส่ใน ds ชื่อ product555
If ds.Tables("Customers").Rows.Count = 0 Then
txtName.Text = ""
Else
txtName.Text = ds.Tables("Customers").Rows(0).Item("Name").ToString()
End If
conn.Close()
End Sub
Private Sub dgvSelectCustomer_CellMouseUp(sender As Object, e As DataGridViewCellMouseEventArgs) Handles
dgvSelectCustomer.CellMouseUp
If e.RowIndex < 0 Then
Exit Sub
End If
txtCustomerId.Text = dgvSelectCustomer.Rows(e.RowIndex).Cells(0).Value.ToString()
txtName.Text = dgvSelectCustomer.Rows(e.RowIndex).Cells(1).Value.ToString()
dgvSelectCustomer.Visible = False
End Sub
Private Sub txtProductId_KeyUp(sender As Object, e As KeyEventArgs) Handles txtProductId.KeyUp
Dim conn As SqlConnection
conn = New SqlConnection("Data Source = ISIN; Database=DBSale; integrated security=true")
If conn.State = ConnectionState.Open Then conn.Close()
conn.Open()
Dim strSql As String = "SELECT * FROM tb_Products Where ProductID = '" + txtProductId.Text + "'"
Dim da As New SqlDataAdapter(strSql, conn)
Dim ds As New DataSet
da.Fill(ds, "Products") 'นำค่ำ da ใส่ใน ds ชื่อ product555
If ds.Tables("Products").Rows.Count = 0 Then
txtProductName.Text = ""
txtUnitsInstock.Text = ""
txtSalePrice.Text = ""
Else
txtProductName.Text = ds.Tables("Products").Rows(0).Item("ProductName").ToString()
txtUnitsInstock.Text = ds.Tables("Products").Rows(0).Item("UnitsInstock").ToString()
txtSalePrice.Text = ds.Tables("Products").Rows(0).Item("SalePrice").ToString()
End If
conn.Close()
End Sub
Private Sub btnSelectProduct_Click(sender As Object, e As EventArgs) Handles btnSelectProduct.Click

4. 4
dgvSelectProduct.Visible = True
Dim conn As SqlConnection
conn = New SqlConnection("Data Source = ISIN; Database=DBSale; integrated security=true")
If conn.State = ConnectionState.Open Then conn.Close()
conn.Open()
'If conn.State = ConnectionState.Open Then MessageBox.Show("Connection OK")
Dim strSql As String = "SELECT ProductID, ProductName, UnitsInstock, SalePrice FROM tb_Products"
Dim da As New SqlDataAdapter(strSql, conn)
Dim ds As New DataSet
da.Fill(ds, "Products")
dgvSelectProduct.DataSource = ds.Tables("Products")
conn.Close()
dgvSelectProduct.Columns(0).HeaderText = "รหัสสินค้ำ"
dgvSelectProduct.Columns(1).HeaderText = "ชื่อสินค้ำ"
dgvSelectProduct.Columns(2).HeaderText = "จำนวนในสต็อก"
dgvSelectProduct.Columns(3).HeaderText = "รำคำขำย"
dgvSelectProduct.Columns(0).Width = 100
dgvSelectProduct.Columns(1).Width = 150
dgvSelectProduct.Columns(2).Width = 120
dgvSelectProduct.Columns(3).Width = 100
End Sub
Private Sub dgvSelectProduct_CellMouseUp(sender As Object, e As DataGridViewCellMouseEventArgs) Handles dgvSelectProduct.CellMouseUp
If e.RowIndex < 0 Then
Exit Sub
End If
txtProductId.Text = dgvSelectProduct.Rows(e.RowIndex).Cells(0).Value.ToString()
txtProductName.Text = dgvSelectProduct.Rows(e.RowIndex).Cells(1).Value.ToString()
txtUnitsInstock.Text = dgvSelectProduct.Rows(e.RowIndex).Cells(2).Value.ToString()
txtSalePrice.Text = dgvSelectProduct.Rows(e.RowIndex).Cells(3).Value.ToString()
dgvSelectProduct.Visible = False
End Sub
Private Sub btnAddProductSale_Click(sender As Object, e As EventArgs) Handles btnAddProductSale.Click
If txtProductName.Text = "" Then
MessageBox.Show("เลือกสินค้ำ")
ElseIf txtAmount.Text = "" Then
MessageBox.Show("กรุณำกรอกจำนวนที่ซื้อ")
ElseIf Convert.ToInt32(txtAmount.Text) > Convert.ToInt32(txtUnitsInstock.Text) Then
MessageBox.Show("จำนวนที่ซื้อมำกกว่ำ สินค้ำในสต็อก")
Else
Dim dgvRow As Integer = dgvSaleDetail.Rows.Count

5. 5
If dgvRow <> 0 Then
For i As Integer = 0 To dgvRow - 1
If dgvSaleDetail.Rows(i).Cells(0).Value.ToString() = txtProductId.Text Then
Dim quantity As Integer = Convert.ToInt32(txtAmount.Text) + Convert.ToInt32(dgvSaleDetail.Rows(i).Cells(3).Value)
If quantity > Convert.ToInt32(txtUnitsInstock.Text) Then
MessageBox.Show("จำนวนที่ซื้อมำกกว่ำ สินค้ำในสต็อก")
Else
dgvSaleDetail.Rows(i).Cells(3).Value = quantity
Dim saleUpdate As Double = quantity * Convert.ToDouble(txtSalePrice.Text)
dgvSaleDetail.Rows(i).Cells(4).Value = saleUpdate
Dim saleTotalUpdate = Convert.ToDouble(lblTotal.Text) + (Convert.ToInt32(txtAmount.Text) *
Convert.ToDouble(txtSalePrice.Text))
lblTotal.Text = saleTotalUpdate.ToString("#,##0.00")
End If
txtProductId.Clear()
txtUnitsInstock.Clear()
txtProductName.Clear()
txtSalePrice.Clear()
txtAmount.Clear()
Exit Sub
End If
Next
End If
Dim numRow = dgvSaleDetail.Rows.Add()
dgvSaleDetail.Rows(numRow).Cells(0).Value = txtProductId.Text
dgvSaleDetail.Rows(numRow).Cells(1).Value = txtProductName.Text
dgvSaleDetail.Rows(numRow).Cells(2).Value = txtSalePrice.Text
dgvSaleDetail.Rows(numRow).Cells(3).Value = txtAmount.Text
Dim salePrice As Double = Convert.ToInt32(txtAmount.Text) * Convert.ToDouble(txtSalePrice.Text)
dgvSaleDetail.Rows(numRow).Cells(4).Value = salePrice
Dim saleTotal As Double = Convert.ToDouble(lblTotal.Text) + salePrice
lblTotal.Text = saleTotal.ToString("#,##0.00")
txtProductId.Clear()
txtUnitsInstock.Clear()
txtProductName.Clear()
txtSalePrice.Clear()
txtAmount.Clear()
End If
End Sub
Private Sub dgvSaleDetail_CellMouseDoubleClick(sender As Object, e As DataGridViewCellMouseEventArgs) Handles
dgvSaleDetail.CellMouseDoubleClick
Dim rowSelect As Integer = e.RowIndex

6. 6
Dim total As Double = Convert.ToDouble(lblTotal.Text) - Convert.ToDouble(dgvSaleDetail.Rows(rowSelect).Cells(4).Value.ToString())
lblTotal.Text = total.ToString("#,##0.00")
dgvSaleDetail.Rows.RemoveAt(rowSelect)
End Sub
Private Sub tsbtnSave_Click(sender As Object, e As EventArgs) Handles tsbtnSave.Click
If txtName.Text = "" Then
MessageBox.Show("เลือกชื่อลูกค้ำด้วย")
ElseIf dgvSaleDetail.Rows.Count = 0 Then
MessageBox.Show("เลือกสินค้ำที่จะซื้อด้วย")
Else
Dim conn As SqlConnection
conn = New SqlConnection("Data Source = ISIN; Database=DBSale; integrated security=true")
If conn.State = ConnectionState.Open Then conn.Close()
conn.Open()
'If conn.State = ConnectionState.Open Then MessageBox.Show("Connection OK")
Dim cm As New SqlCommand
cm.Connection = conn
cm.CommandType = CommandType.Text
Dim strSql As String
strSql = "insert into tb_sale (billId, saleDate, customerId, total) values ('" + txtBillid.Text + "', '" +
dtpSaleDate.Value.Date.ToString("yyyy-MM-dd", New System.Globalization.CultureInfo("en-US")) + "', '" + txtCustomerId.Text + "', " +
lblTotal.Text + ")"
cm.CommandText = strSql
cm.ExecuteNonQuery()
MessageBox.Show("บันทึกเรียบร้อยแล้ว")
conn.Close()
End If
End Sub
End Class
Save File Dialog Confirm
Private Sub SaveButton_Click(sender As Object, e As EventArgs) Handles SaveButton.Click
SaveFileDialog1.DefaultExt = "*.rtf"
SaveFileDialog1.Filter = "RTF Files|*.rtf"

7. 7
SaveFileDialog1.CreatePrompt = True
If SaveFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
RichTextBox1.SaveFile(SaveFileDialog1.FileName, RichTextBoxStreamType.RichText)
End If
End Sub
มินิโปรเจค
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
Imports System.Data.SqlClient
Imports System.Drawing
Imports System.Linq
Imports System.Text
Imports System.Windows.Forms

8. 8
Namespace WindowsFormsApplication1
Public Partial Class AddOrder
Inherits Form
Private btnText As String
Public Sub New(btnText As String)
InitializeComponent()
Me.btnText = btnText
End Sub
Private Sub loadDataToAdd()
Dim nt As Integer = Convert.ToInt16(btnText.Substring(7))
'sub x
Dim T00 As String = "T" + nt.ToString("00")
'1.ติดต่อฐำนข้อมูล
'string conStr = "server=Localhost;initial catalog=DBBarBQ;integrated security=true";
Dim conStr As String = "server=Localhost ;initial catalog=DBBarBQ;integrated security=true"
Dim connectDB As New SqlConnection(conStr)
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If
Try
'MessageBox.Show("โอเคผ่ำน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)
Return
End Try
'2.คำสั่ง SQL BillID,TableID,SaleDate,AmountChild,AmountAdult,Total,Fined,AmountFined,Status
'tb_xxxx1 a left join tb_xxxx2 b on a.BillID=b.BillID

9. 9
Dim strSql As String = (Convert.ToString("select * " + " from tb_Sale S left join tb_saledetail SD on S.BillID=SD.BillID" +
" where S.status = 'Yes' and S.TableID = '") & T00) + "'"
'สมมติ T01 มี ทำ ถ้ำไม่มี ไม่ทำ
'3.สั่งให้ SQl ทำงำน
Dim cmd As New SqlCommand(strSql, connectDB)
'ทำงำน
Dim dr As SqlDataReader = cmd.ExecuteReader()
'สั่งให้ทำงำน + ดึงค่ำที่ได้มำ
'3.1 ทำอะไรก็แล้วแต่
If dr.Read() Then
txtBill.Text = dr("BillID").ToString()
txtChild.Text = dr("AmountChild").ToString()
txtAdult.Text = dr("AmountAdult").ToString()
txtAmount.Text = dr("AmountFined").ToString()
End If
'4.
connectDB.Close()
'###################################### dgvBev #######################################//
If connectDB.State = ConnectionState.Closed Then
connectDB.Open()
End If
If True Then
'1.ติดต่อฐำนข้อมูล
'string conStr = "server=Localhost;initial catalog=DBBarBQ;integrated security=true";
'string conStr2 = "server=Localhost ;initial catalog=DBBarBQ;integrated security=true";
'SqlConnection connectDB2 = new SqlConnection(conStr2);
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If

10. 10
Try
'MessageBox.Show("โอเคผ่ำน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)
Return
End Try
'2.คำสั่ง SQL BillID,TableID,SaleDate,AmountChild,AmountAdult,Total,Fined,AmountFined,Status
'2.คำสั่ง SQL BeveragesID ,BeveragesName ,SalePrice ,Cost ,UnitStock
Dim strSqlBev As String = "select BeveragesID, BeveragesName , SalePrice , UnitStock from tb_Beverages"
'คำสั่ง
'3.สั่งให้ SQl ทำงำน
Dim cmd2 As New SqlCommand(strSqlBev, connectDB)
'ทำงำน
Dim dr2 As SqlDataReader = cmd2.ExecuteReader()
'สั่งให้ทำงำน + ดึงค่ำที่ได้มำ
'3.1 ทำอะไรก็แล้วแต่ เอำไปใส่ใน DataGridview Bevproduct
'connectDB.Close();
While dr2.Read()
'กรณีมีข้อมูล
'MessageBox.Show(dr2["BeveragesID"].ToString());
'เพิ่มแถวใน GV พร้อมกับกำหนดตัวแปร เก็บหมำยเลขแถว
Dim numRow As Integer = dgvBev.Rows.Add()
'numRow = numRow;
'3.1 product
dgvBev.Rows(numRow).Cells(0).Value = dr2("BeveragesID").ToString()
dgvBev.Rows(numRow).Cells(1).Value = dr2("BeveragesName").ToString()
dgvBev.Rows(numRow).Cells(2).Value = dr2("UnitStock").ToString()
dgvBev.Rows(numRow).Cells(3).Value = dr2("SalePrice").ToString()
'txtProductId.Text = dr2["BeveragesID"].ToString();

11. 11
numRow = numRow + 1
End While
'DataTable dt2 = new DataTable();
'dt2.Load(dr2);//เก็บสิ่งที่ได้มำ
'dgvAddBev.DataSource = dt2;//เอำสิ่งที่เก็บใส่ DataGridView
connectDB.Close()
End If
'###################################### dgvAddBev #######################################//
If connectDB.State = ConnectionState.Closed Then
connectDB.Open()
End If
If True Then
'MessageBox.Show("Op1");
'1.ติดต่อฐำนข้อมูล
'string conStr = "server=Localhost;initial catalog=DBBarBQ;integrated security=true";
'string conStr2 = "server=Localhost ;initial catalog=DBBarBQ;integrated security=true";
'SqlConnection connectDB2 = new SqlConnection(conStr2);
'if (connectDB.State == ConnectionState.Closed) connectDB.Open();
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If
Try
'MessageBox.Show("โอเคผ่ำน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)

12. 12
Return
End Try
'2.คำสั่ง SQL BillID,TableID,SaleDate,AmountChild,AmountAdult,Total,Fined,AmountFined,Status
'2.คำสั่ง SQL BeveragesID ,BeveragesName ,SalePrice ,Cost ,UnitStock
Dim strSqlAddBev As String = (Convert.ToString("select * " + " from tb_SaleDetail SD left join tb_Beverages
Bev on SD.BeveragesID=Bev.BeveragesID " + " left join tb_Sale S on SD.BillID=S.BillID " + " where
SD.BeveragesID=Bev.BeveragesID " + " and S.status = 'Yes' and S.TableID = '") & T00) + "'"
'3.สั่งให้ SQl ทำงำน
Dim cmd3 As New SqlCommand(strSqlAddBev, connectDB)
'ทำงำน
Dim dr3 As SqlDataReader = cmd3.ExecuteReader()
'สั่งให้ทำงำน + ดึงค่ำที่ได้มำ
'3.1 ทำอะไรก็แล้วแต่ เอำไปใส่ใน DataGridview Bevproduct
While dr3.Read()
'กรณีมีข้อมูล
'MessageBox.Show(dr3["BeveragesID"].ToString()+"Before");
'เพิ่มแถวใน GV พร้อมกับกำหนดตัวแปร เก็บหมำยเลขแถว
Dim numRow As Integer = dgvAddBev.Rows.Add()
'numRow = numRow;
'3.1 product
dgvAddBev.Rows(numRow).Cells(0).Value = dr3("BeveragesID").ToString()
dgvAddBev.Rows(numRow).Cells(1).Value = dr3("BeveragesName").ToString()
dgvAddBev.Rows(numRow).Cells(2).Value = dr3("UnitStock").ToString()
dgvAddBev.Rows(numRow).Cells(3).Value = dr3("SalePrice").ToString()
'txtProductId.Text = dr2["BeveragesID"].ToString();
numRow = numRow + 1
End While
'

13. 13
' DataTable dt = new DataTable();
' dt.Load(dr3);//เก็บสิ่งที่ได้มำ
' int dtnum = dt.Rows.Count;
' MessageBox.Show(dtnum.ToString());
' if (dtnum > 0)
' {
' dataGridView1.Enabled = true;
' dataGridView1.Visible = true;
' }
' else
' {
' dataGridView1.Enabled = false;
' dataGridView1.Visible = false;
' }
' dataGridView1.DataSource = dt;//เอำสิ่งที่เก็บใส่ DataGridView
' dataGridView1.Columns[0].Width = 100;
' dataGridView1.Columns[1].Width = 250;
' dataGridView1.Columns[2].Width = 150;
' dataGridView1.Columns[3].Width = 150;
' dataGridView1.Columns[4].Width = 150;
'
connectDB.Close()
End If
End Sub
Private Sub AddOrder_Load(sender As Object, e As EventArgs)
lblTableX.Text = btnText
'โตะที่ x

14. 14
loadDataToAdd()
End Sub
Private Sub dgvBev_CellMouseUp(sender As Object, e As DataGridViewCellMouseEventArgs)
If e.RowIndex = -1 Then
Return
End If
txtBevID.Text = dgvBev.Rows(e.RowIndex).Cells(0).Value.ToString()
txtBevName.Text = dgvBev.Rows(e.RowIndex).Cells(1).Value.ToString()
txtAmount.Enabled = True
txtAmount.Focus()
btnAddProductSale.Enabled = True
btnDelete.Enabled = True
End Sub
Private Sub tsbtnHome_Click(sender As Object, e As EventArgs)
AddOrder.ActiveForm.Close()
End Sub
Private Sub chkChild_CheckedChanged(sender As Object, e As EventArgs)

15. 15
If chkChild.Checked Then
txtChild.Enabled = True
txtChild.Focus()
Else
txtChild.Enabled = False
txtChild.Focus()
End If
End Sub
Private Sub chkAdult_CheckedChanged(sender As Object, e As EventArgs)
If chkAdult.Checked Then
txtAdult.Enabled = True
txtAdult.Focus()
Else
txtAdult.Enabled = False
txtAdult.Focus()
End If
End Sub
Private Sub txtChild_KeyPress(sender As Object, e As KeyPressEventArgs)
End Sub
Private Sub txtAdult_KeyPress(sender As Object, e As KeyPressEventArgs)
End Sub
Private Sub btnAddProductSale_Click(sender As Object, e As EventArgs)
End Sub

16. 16
Private Sub tsbtnHome_Click_1(sender As Object, e As EventArgs)
Dim ManageBv As New ManageBv()
Me.Close()
ManageBv.Show()
End Sub
Private Sub tsbtnManageBv_Click(sender As Object, e As EventArgs)
Dim ManageBv As New ManageBv()
Me.Close()
ManageBv.Show()
End Sub
Private Sub tsbtnPricePeople_Click(sender As Object, e As EventArgs)
Dim PricePeople As New PricePeople()
Me.Close()
PricePeople.Show()
End Sub
Private Sub tsbtnReportEarn_Click(sender As Object, e As EventArgs)
Dim ReportEarn As New ReportEarn()
Me.Close()
ReportEarn.Show()
End Sub
Private Sub btnSaveOrder_Click(sender As Object, e As EventArgs)
End Sub
Private Sub btnCancelOrder_Click(sender As Object, e As EventArgs)

17. 17
End Sub
' private void txtChild_TextChanged(object sender, EventArgs e)
' {
' int number;
' if (!Int32.TryParse(txtChild.Text, out number))
' {
' MessageBox.Show("ข้อมูลของคุณต้องเป็นตัวเลขจำนวนเต็มเท่ำนั้น", "ตรวจสอบตัวเลข", MessageBoxButtons.OK,
MessageBoxIcon.Warning);
' }
' }
Private Sub txtChild_KeyPress_1(sender As Object, e As KeyPressEventArgs)
If Not Char.IsControl(e.KeyChar) AndAlso Not Char.IsDigit(e.KeyChar) AndAlso (e.KeyChar <> "."C) Then
e.Handled = True
End If
' only allow one decimal point
If (e.KeyChar = "."C) AndAlso (TryCast(sender, TextBox).Text.IndexOf("."C) > -1) Then
e.Handled = True
End If
End Sub
Private Sub chkFined_CheckedChanged(sender As Object, e As EventArgs)
If chkFined.Checked Then
txtAmountFined.Enabled = True
txtAmountFined.Focus()
Else
txtAmountFined.Enabled = False
txtAmountFined.Focus()
End If

18. 18
End Sub
Private Sub txtChild_KeyPress_2(sender As Object, e As KeyPressEventArgs)
If Not Char.IsControl(e.KeyChar) AndAlso Not Char.IsDigit(e.KeyChar) AndAlso (e.KeyChar <> "."C) Then
e.Handled = True
End If
' only allow one decimal point
If (e.KeyChar = "."C) AndAlso (TryCast(sender, TextBox).Text.IndexOf("."C) > -1) Then
e.Handled = True
End If
End Sub
Private Sub dgvBev_CellContentClick(sender As Object, e As DataGridViewCellEventArgs)
End Sub
End Class
End Namespace
Manage BV
Imports System.Data.SqlClient
Public Class ManagBv
Dim flag As String
Private Sub ToolStripButton3_Click(sender As Object, e As EventArgs)
Me.Hide()
Main.Show()
End Sub
Private Sub ToolStripButton1_Click(sender As Object, e As EventArgs)
Me.Hide()
'addOrder.Show()
End Sub
Private Sub ManagBv_Load(sender As Object, e As EventArgs) Handles MyBase.Load
If True Then

19. 19
'1.ติดต่อฐำนข้อมูล
'string conStr = "server=ASUS-PCSqlExpress;initial catalog=DBBarBQ;integrated security=true";
Dim conStr As String = "server=ISIN;initial catalog=DBBarBQ;integrated security=true"
Dim connectDB As New SqlConnection(conStr)
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If
Try
'MessageBox.Show("โอเคผ่ำน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)
Return
End Try
'2.คำสั่ง SQL BeveragesID , BeveragesName , SalePrice , Cost , UnitStock
Dim strSql As String = "select BeveragesID, BeveragesName , Cost , SalePrice , UnitStock from tb_Beverages"
'คำสั่ง
'3.สั่งให้ SQl ทำงำน
Dim cmd As New SqlCommand(strSql, connectDB)
'ทำงำน
Dim dr As SqlDataReader = cmd.ExecuteReader()
'สั่งให้ทำงำน + ดึงค่ำที่ได้มำ
'3.1 ทำอะไรก็แล้วแต่
Dim dt As New DataTable()
dt.Load(dr)
'เก็บสิ่งที่ได้มำ
dgvEditProduct.DataSource = dt
'เอำสิ่งที่เก็บใส่ DataGridView
connectDB.Close()
dgvEditProduct.Columns(0).HeaderText = "เลขที่สินค้ำ"
'กำหนดชื่อหัวColum
dgvEditProduct.Columns(1).HeaderText = "ชื่อเครื่องดื่ม"
dgvEditProduct.Columns(2).HeaderText = "รำคำทุน"
dgvEditProduct.Columns(3).HeaderText = "รำคำขำย"
dgvEditProduct.Columns(4).HeaderText = "จำนวนในสต็อก"
dgvEditProduct.Columns(0).Width = 100
dgvEditProduct.Columns(1).Width = 200
dgvEditProduct.Columns(2).Width = 100
dgvEditProduct.Columns(3).Width = 100
dgvEditProduct.Columns(4).Width = 120
End If
End Sub
Private Sub btnCancle_Click(sender As Object, e As EventArgs) Handles btnCancle.Click
If True Then
btnAdd.Enabled = True
btnCancle.Enabled = False
btnSave.Enabled = False

20. 20
btnEdit.Enabled = False
btnDelete.Enabled = False
txtEditProductName.Enabled = False
txtEditStock.Enabled = False
txtEditCost.Enabled = False
txtEditPrice.Enabled = False
txtEditSearch.Focus()
txtEditProductId.Clear()
txtEditProductName.Text = "กรอกรำยละเอียด"
txtEditStock.Text = "กรอกรำยละเอียด"
txtEditCost.Text = "กรอกรำยละเอียด"
txtEditPrice.Text = "กรอกรำยละเอียด"
txtEditSearch.Text = "กรอกรำยละเอียด"
loadDateToDgvEditProducts()
End If
End Sub
Private Sub dgvEditProduct_CellMouseUp(sender As Object, e As DataGridViewCellMouseEventArgs) Handles dgvEditProduct.CellMouseUp
If True Then
If e.RowIndex = -1 Then
Return
End If
txtEditProductId.Text = dgvEditProduct.Rows(e.RowIndex).Cells("BeveragesID").Value.ToString()
txtEditProductName.Text = dgvEditProduct.Rows(e.RowIndex).Cells("BeveragesName").Value.ToString()
txtEditStock.Text = dgvEditProduct.Rows(e.RowIndex).Cells("UnitStock").Value.ToString()
txtEditCost.Text = dgvEditProduct.Rows(e.RowIndex).Cells("Cost").Value.ToString()
txtEditPrice.Text = dgvEditProduct.Rows(e.RowIndex).Cells("SalePrice").Value.ToString()
txtEditStock.Focus()
btnAdd.Enabled = False
btnCancle.Enabled = True
btnEdit.Enabled = True
btnDelete.Enabled = True
End If
End Sub
Private Sub btnAdd_Click(sender As Object, e As EventArgs) Handles btnAdd.Click
If True Then
flag = "Add"
txtEditStock.Clear()
txtEditPrice.Clear()
txtEditProductName.Clear()
txtEditProductId.Clear()
txtEditCost.Clear()

21. 21
btnAdd.Enabled = False
btnCancle.Enabled = True
btnSave.Enabled = True
txtEditProductName.Enabled = True
txtEditProductName.Focus()
txtEditStock.Enabled = True
txtEditCost.Enabled = True
txtEditPrice.Enabled = True
'1.ติดต่อฐำนข้อมูล
Dim conStr As String = "server=ISIN;initial catalog=DBBarBQ;integrated security=true"
Dim connectDB As New SqlConnection(conStr)
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If
Try
'MessageBox.Show("โอเคผ่ำน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)
Return
End Try
'2.คำสั่ง SQL
Dim strSql As String = "select top 1 BeveragesID from tb_Beverages order by BeveragesID DESC"
'3.สั่งให้ SQl ทำงำน
Dim cmd As New SqlCommand(strSql, connectDB)
Dim dr As SqlDataReader = cmd.ExecuteReader()
'3.1 ทำอะไรก็แล้วแต่
If dr.Read() Then
'กรณีที่มีรหัสอยู่แล้ว
Dim oldwaID As String = dr("BeveragesID").ToString()
Dim newWaId As Integer = Convert.ToInt16(oldwaID.Substring(3)) + 1
'oldwaID เอำมำsub
txtEditProductId.Text = "wa" + newWaId.ToString("000")
Else
'กรณีที่ไม่มีรหัสสินค้ำเครื่องดื่ม
txtEditProductId.Text = "wa001"
End If
'4.ยกเลิกติดต่อ
connectDB.Close()
End If
End Sub

22. 22
Private Sub btnSave_Click(sender As Object, e As EventArgs) Handles btnSave.Click
If txtEditProductName.Text = "" Then
MessageBox.Show("กรุณำกรอกชื่อสินค้ำ/เครื่องดื่ม")
ElseIf txtEditStock.Text = "" Then
MessageBox.Show("กรุณำกรอกจำนวนสต๊อก")
ElseIf txtEditCost.Text = "" Then
MessageBox.Show("กรุณำกรอกรำคำทุน")
ElseIf txtEditPrice.Text = "" Then
MessageBox.Show("กรุณำกรอกรำคำขำย")
ElseIf flag = "Add" Then
'MessageBox.Show("add");
'1.ติดต่อฐำนข้อมูล
Dim conStr As String = "server=ISIN;initial catalog=DBBarBQ;integrated security=true"
Dim connectDB As New SqlConnection(conStr)
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If
Try
'MessageBox.Show("โอเคผ่ำน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)
Return
End Try
'2. Sql statement BeveragesID, BeveragesName , Cost , SalePrice , UnitStock
Dim strSql As [String] = "Insert into tb_Beverages (BeveragesID,BeveragesName,Cost,SalePrice,UnitStock)values(" + "'" +
txtEditProductId.Text + "'" + ",'" + txtEditProductName.Text + "'" + ",'" + txtEditStock.Text + "'" + ",'" + txtEditCost.Text + "'" + ",'" +
txtEditPrice.Text + "'" + ")"
'3. สั่ง Sql statement ทำงำน
Dim cmd As New SqlCommand(strSql, connectDB)
cmd.ExecuteNonQuery()
'3.1 ทำอะไรก็แล้วแต่
MessageBox.Show("บันทึกหน้ำจอเรียบร้อยแล้ว")
'4. Disconnect
connectDB.Close()
btnCancle.PerformClick()
End If
End Sub
Private Sub btnEdit_Click(sender As Object, e As EventArgs) Handles btnEdit.Click
flag = "update"
btnEdit.Enabled = False
btnDelete.Enabled = False
btnSave.Enabled = True
txtEditProductName.Enabled = True
txtEditProductName.Focus()

23. 23
txtEditStock.Enabled = True
txtEditCost.Enabled = True
txtEditPrice.Enabled = True
End Sub
Private Sub loadDateToDgvEditProducts()
End Sub
Private Sub ToolStripButton1_Click_1(sender As Object, e As EventArgs) Handles ToolStripButton1.Click
Me.Hide()
Main.Show()
End Sub
Private Sub ToolStripButton2_Click(sender As Object, e As EventArgs) Handles ToolStripButton2.Click
Me.Hide()
End Sub
Private Sub ToolStripButton4_Click(sender As Object, e As EventArgs) Handles ToolStripButton4.Click
Me.Hide()
PricePeople.Show()
End Sub
Private Sub ToolStripButton5_Click_1(sender As Object, e As EventArgs) Handles ToolStripButton5.Click
Me.Hide()
ReportEarn.Show()
End Sub
Private Sub txtEditStock_KeyPress(sender As Object, e As KeyPressEventArgs) Handles txtEditStock.KeyPress
If e.KeyChar.ToString = "." And txtEditStock.Text.Contains(".") Then
e.Handled = True
Exit Sub
End If
Dim regex As String = "^[0-9.rntbs]+$"
Dim r As New System.Text.RegularExpressions.Regex(regex)
If r.IsMatch(e.KeyChar.ToString()) Then
e.Handled = False
Else
e.Handled = True
End If
End Sub
Private Sub txtEditCost_KeyPress(sender As Object, e As KeyPressEventArgs) Handles txtEditCost.KeyPress
If e.KeyChar.ToString = "." And txtEditCost.Text.Contains(".") Then
e.Handled = True
Exit Sub
End If

24. 24
Dim regex As String = "^[0-9.rntbs]+$"
Dim r As New System.Text.RegularExpressions.Regex(regex)
If r.IsMatch(e.KeyChar.ToString()) Then
e.Handled = False
Else
e.Handled = True
End If
End Sub
Private Sub txtEditPrice_KeyPress(sender As Object, e As KeyPressEventArgs) Handles txtEditPrice.KeyPress
If e.KeyChar.ToString = "." And txtEditPrice.Text.Contains(".") Then
e.Handled = True
Exit Sub
End If
Dim regex As String = "^[0-9.rntbs]+$"
Dim r As New System.Text.RegularExpressions.Regex(regex)
If r.IsMatch(e.KeyChar.ToString()) Then
e.Handled = False
Else
e.Handled = True
End If
End Sub
Private Sub btnDelete_Click(sender As Object, e As EventArgs) Handles btnDelete.Click
MessageBox.Show("ยืนยันกำรลบ")
btnDelete.Enabled = False
btnCancle.Enabled = True
If MessageBox.Show("ต้องกำรลบหรือไม่", "ยืนยัน", MessageBoxButtons.YesNo, MessageBoxIcon.Question) = DialogResult.Yes Then
'1.ติดต่อฐำนข้อมูล
'string conStr = "server=ASUS-PCSqlExpress;initial catalog=DBBarBQ;integrated security=true";
Dim conStr As String = "server=ISIN;initial catalog=DBBarBQ;integrated security=true"
Dim connectDB As New SqlConnection(conStr)
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If
Try
'MessageBox.Show("โอเคผ่ำน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)
Return
End Try
Dim strSql As String = "delete from tb_Beverages where BeveragesID = '" + txtEditProductId.Text + "'"
Dim cmd As New SqlCommand(strSql, connectDB)
Dim dr As SqlDataReader = cmd.ExecuteReader()

25. 25
MessageBox.Show("ลบรำยกำรเรียบร้อยแล้ว")
'4. Disconnect
connectDB.Close()
btnDelete.Enabled = False
btnCancle.Enabled = True
btnDelete.Enabled = False
btnCancle.Enabled = True
dgvEditProduct.Refresh()
End If
End Sub
End Class
Public Class PricePeople
Private Sub btnEdit_Click(sender As Object, e As EventArgs)
txtAdult.Enabled = True
End Sub
Private Sub btnEdit2_Click(sender As Object, e As EventArgs)
txtChild.Enabled = True
End Sub
Private Sub loadDataToPricePeople()
'1.ติดต่อฐานข้อมูล
Dim conStr As String = "server=Localhost;initial catalog=DBBarBQ;integrated security=true"
Dim connectDB As New SqlConnection(conStr)
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If
Try
'MessageBox.Show("โอเคผ่าน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)
Return
End Try
'2.คาสั่ง SQL (DateEdit,Child,Adult)
Dim strSql As String = "select top 1 Child, Adult , DateEdit from tb_PricePerson order by
DateEdit desc"
'คาสั่ง
'3.สั่งให้ SQl ทางาน
Dim cmd As New SqlCommand(strSql, connectDB)
'ทางาน
Dim dr As SqlDataReader = cmd.ExecuteReader()
'สั่งให้ทางาน + ดึงค่าที่ได้มา
'3.1 ทาอะไรก็แล้วแต่
If dr.Read() Then
txtAdult.Text = dr("Child").ToString()
txtChild.Text = dr("Adult").ToString()

26. 26
Dim dateDr As String = dr("DateEdit").ToString()
dateDr = dateDr.Substring(0, 9)
'lblDateNowPrice.Text = DateTime.Now.ToString("dd MMMM yyyy", New
System.Globalization.CultureInfo("th-TH"))
End If
'4.ปิด
connectDB.Close()
txtChild.Enabled = False
txtAdult.Enabled = False
dtpEdit.Enabled = False
End Sub
Private Sub PricePeople_Load(sender As Object, e As EventArgs) Handles MyBase.Load
loadDataToPricePeople()
txtAdult.Enabled = False
txtChild.Enabled = False
End Sub
Private Sub btnEditDateFinish_Click(sender As Object, e As EventArgs)
dtpEdit.Enabled = True
End Sub
Private Sub ToolStripButton1_Click(sender As Object, e As EventArgs) Handles
ToolStripButton1.Click
Me.Hide()
Main.Show()
End Sub
Private Sub ToolStripButton2_Click(sender As Object, e As EventArgs) Handles
ToolStripButton2.Click
Me.Hide()
AddOrder.Show()
End Sub
Private Sub ToolStripButton3_Click(sender As Object, e As EventArgs) Handles
ToolStripButton3.Click
Me.Hide()
ManagBv.Show()
End Sub
Private Sub ToolStripButton5_Click(sender As Object, e As EventArgs) Handles
ToolStripButton5.Click
Me.Hide()
ReportEarn.Show()
End Sub
Private Sub btnSavePricePeople_Click(sender As Object, e As EventArgs) Handles
btnSavePricePeople.Click
'MessageBox.Show(txtAdult.Text);
If Convert.ToInt16(txtAdult.Text) > 999 Then
MessageBox.Show("กรุณาระบุค่าบุฟเฟ่ต์ไม่เกิน 999 บาท")
txtAdult.Focus()
ElseIf Convert.ToInt16(txtChild.Text) > 999 Then
MessageBox.Show("กรุณาระบุค่าบุฟเฟ่ต์ไม่เกิน 999 บาท")

27. 27
txtChild.Focus()
Else
'1.ติดต่อฐานข้อมูล
'string conStr = "server=ASUS-PCSqlExpress;initial catalog=DBBarBQ;integrated
security=true";
Dim conStr As String = "server=Localhost;initial catalog=DBBarBQ;integrated
security=true"
Dim connectDB As New SqlConnection(conStr)
If connectDB.State = ConnectionState.Open Then
connectDB.Close()
End If
Try
'MessageBox.Show("โอเคผ่าน");
connectDB.Open()
Catch ex As Exception
MessageBox.Show("can't Database open." + ex.Message)
Return
End Try
'String dateS = dtpFinish.Value.Date.ToShortDateString();
Dim dateEdit As String = DateTime.Now.ToString("yyyy-MM-dd " + "hh:mm:ss.fff")
Dim YYYYF As String = (Convert.ToInt16(dtpEdit.Value.[Date].ToString("yyyy")) -
543).ToString("0000")
'String dateF = dtpEdit.Value.Date.ToString(YYYYF + "-MM-dd " + "hh:mm:ss.fff");
Dim yyyy As Integer = Convert.ToInt16(dtpEdit.Value.[Date].ToString("yyyy"))
Dim MM As Integer = Convert.ToInt16(dtpEdit.Value.[Date].ToString("MM"))
Dim dd As Integer = Convert.ToInt16(dtpEdit.Value.[Date].ToString("dd"))
'MessageBox.Show(a.ToString() + b.ToString());
'yyyyF<S
'MMF<S
'ddF<S
If yyyy < Convert.ToInt16(DateTime.Now.ToString("yyyy")) Then
MessageBox.Show("กรุณาตรวจสอบปี")
ElseIf yyyy = Convert.ToInt16(DateTime.Now.ToString("yyyy")) AndAlso MM <
Convert.ToInt16(DateTime.Now.ToString("MM")) Then
MessageBox.Show("กรุณาตรวจสอบเดือน")
ElseIf yyyy = Convert.ToInt16(DateTime.Now.ToString("yyyy")) AndAlso MM =
Convert.ToInt16(DateTime.Now.ToString("MM")) AndAlso dd <
Convert.ToInt16(DateTime.Now.ToString("dd")) Then
MessageBox.Show("กรุณาตรวจสอบวัน")
Else
'2. Sql statement //ลงตาราง tb_PricePerson (DateStart,Child,Adult,Datefinish)
Dim strSql As [String] = (Convert.ToString("Insert into tb_PricePerson
(DateEdit,Adult,Child)values(" + " '") & dateEdit) + "'" + ",'" + txtChild.Text + "'" + ",'" +
txtAdult.Text + "'" + ")"
'3. สั่ง Sql statement ทางาน
Dim cmd As New SqlCommand(strSql, connectDB)
cmd.ExecuteNonQuery()
'3.1
MessageBox.Show("บันทึกหน้าจอเรียบร้อยแล้ว")
End If
'4.close DB
connectDB.Close()
loadDataToPricePeople()
End If

28. 28
End Sub
'MsgBox(txtAdult.Text & " " & txtChild.Text & " " & dtpFinish.Text)
'If True Then
' '1.ติดต่อฐานข้อมูล
' 'string conStr = "server=ISIN;initial catalog=DBBarBQ;integrated security=true";
' Dim conStr As String = "server=Localhost;initial catalog=DBBarBQ;integrated
security=true"
' Dim connectDB As New SqlConnection(conStr)
' If connectDB.State = ConnectionState.Open Then
' connectDB.Close()
' End If
' Try
' 'MessageBox.Show("โอเคผ่าน");
' connectDB.Open()
' Catch ex As Exception
' MessageBox.Show("can't Database open." + ex.Message)
' Return
' End Try
' 'string dateS = dtpFinish.Value.Date.ToShortDateString();
' Dim dateS As String = DateTime.Now.ToString("yyyy-MM-dd " + "hh:mm:ss.fff")
' Dim YYYYF As String = (Convert.ToInt16(dtpFinish.Value.[Date].ToString("yyyy")) -
543).ToString("0000")
' Dim dateF As String = dtpFinish.Value.[Date].ToString((YYYYF & Convert.ToString("-MM-dd
")) + "hh:mm:ss.fff")
' Dim yyyy As Integer = Convert.ToInt16(dtpFinish.Value.[Date].ToString("yyyy"))
' Dim MM As Integer = Convert.ToInt16(dtpFinish.Value.[Date].ToString("MM"))
' Dim dd As Integer = Convert.ToInt16(dtpFinish.Value.[Date].ToString("dd"))
' 'MessageBox.Show(a.ToString() + b.ToString());
' 'yyyyF<S
' 'MMF<S
' 'ddF<S
' If yyyy < Convert.ToInt16(DateTime.Now.ToString("yyyy")) Then
' MessageBox.Show("กรุณาตรวจสอบปี")
' ElseIf yyyy = Convert.ToInt16(DateTime.Now.ToString("yyyy")) AndAlso MM <
Convert.ToInt16(DateTime.Now.ToString("MM")) Then
' MessageBox.Show("กรุณาตรวจสอบเดือน")
' ElseIf yyyy = Convert.ToInt16(DateTime.Now.ToString("yyyy")) AndAlso MM =
Convert.ToInt16(DateTime.Now.ToString("MM")) AndAlso dd <
Convert.ToInt16(DateTime.Now.ToString("dd")) Then
' MessageBox.Show("กรุณาตรวจสอบวัน")
' Else
' '2. Sql statement //ลงตาราง tb_PricePerson (DateStart,Child,Adult,Datefinish)
' '+ ",'" + txtAdult.Text + "'"
' '+ ", 2558-09-04 00:00:00 "
' Dim strSql As [String] = (Convert.ToString((Convert.ToString("Insert into
tb_PricePerson (DateStart,Adult,Child,Datefinish)values(" + " '") & dateS) + "'" + ",'" +
txtAdult.Text + "'" + ",'" + txtChild.Text + "'" + ",'") & dateF) + "'" + ")"
' '3. สั่ง Sql statement ทางาน
' Dim cmd As New SqlCommand(strSql, connectDB)
' cmd.ExecuteNonQuery()
' '3.1

29. 29
' MessageBox.Show("บันทึกหน้าจอเรียบร้อยแล้ว")
' End If
' '4.close DB
' connectDB.Close()
' loadDataToPricePeople()
'End If
Private Sub btnEditAdult_Click(sender As Object, e As EventArgs)
txtAdult.Enabled = True
txtAdult.Focus()
End Sub
Private Sub btnEditChild_Click(sender As Object, e As EventArgs)
txtChild.Enabled = True
txtChild.Focus()
End Sub
Private Sub Label6_Click(sender As Object, e As EventArgs) Handles Label6.Click
End Sub
Private Sub btnEditDateFinish_Click_1(sender As Object, e As EventArgs) Handles
btnEditDateFinish.Click
txtAdult.Enabled = True
txtAdult.Focus()
txtChild.Enabled = True
dtpEdit.Enabled = True
End Sub
Private Sub txtAdult_KeyDown(sender As Object, e As KeyEventArgs) Handles txtAdult.KeyDown
If e.KeyCode = Keys.Enter Then
txtChild.Focus()
End If
End Sub
Private Sub txtChild_KeyDown(sender As Object, e As KeyEventArgs) Handles txtChild.KeyDown
If e.KeyCode = Keys.Enter Then
dtpEdit.Focus()
End If
End Sub
End Class

30. 30
โค๊ด combobox ดึงข้อมูลออกมำ จำก Db
Dim strConnString As String
strConnString = "Server=localhost;User Id=root; Password=root; Database=mydatabase; Pooling=false"
objConn = New MySqlConnection(strConnString)
objConn.Open()
Dim sqlGeo As String = "SELECT geo_name FROM geography"
Dim daGeo As New MySqlDataAdapter(sqlGeo, con)
Dim dtGeo As New DataTable
daGeo.Fill(dtGeo)
With cmbGeo
.DataSource = dtGeo
.DisplayMember = dtGeo.Columns.Item("geo_name").ColumnName
End With
ต้องกำร ให้ลบแถวที่เรำเลือกไว้ ลบ โดย ใช้ปุ่ม del ปกติ ให้มีข้อควำมเตือนและสำมำรถลบได้ปกตำมที่ defalut
niras srihemthong:
Private Sub DataGridView1_KeyDown(ByVal sender As Object, _
ByVal e As System.Windows.Forms.KeyEventArgs) _
Handles DataGridView1.KeyDown
Dim CurRow As Integer
CurRow = Me.DataGridView1.CurrentRow.Index
If e.KeyCode = Keys.Delete Then
If Me.DataGridView1.Rows.Count <> 1 Then
Dim Result As MsgBoxResult
Result = MessageBox.Show("ต้องกำรลบข้อมูลแถวนี้หรือไม่", "ยืนยัน", MessageBoxButtons.YesNo, _
MessageBoxIcon.Question, MessageBoxDefaultButton.Button1)

31. 31
If Result = MsgBoxResult.Yes Then
Me.DataGridView1.Rows.RemoveAt(CurRow)
End If
End If
End If
End Sub
ผมว่ำผูกข้อมูลโดยกำรเขียนโค้ดจะดีกว่ำในกรณีต้องกำร refresh ข้อมูลใหม่บ่อยหรือมีกำรใช้งำนร่วมกันหลำย ๆ ฟอร์ม ถ้ำจะอธิบำยก็คงต้องเริ่มตั้งแต่กำร เขียนโค้ดในกำรผูก
ข้อมูลตั้งแต่เริ่มแรกเลยไม่ยำกครับลองแกะดูครับ ผมก็อำศัยวิธีเดียวกับคุณนั้นแหละ เพรำะว่ำหนังสือไทยไม่มีเลย ก็ต้องไปหำอ่ำนตำมเว็บเมืองนอก
ผมจะเขียนแบบนี้ครับ
Imports System.Data.OleDb 'เรียกใช้เฟรมเวิร์ก
Public Class form1
Dim strConn As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & _
Windows.Forms.Application.StartupPath & "databaseMyDataBase.mdb;Jet OLEDB:Database Password=1234;"
'กำหนด พำร์ทของฐำนข้อมูลครับ ในที่นี้เป็นฐำนข้อมูล Access ชื่อว่ำ MyDataBase.mdb password 1234 ถ้ำมีกำรตั้ง password ใน access คำสั่ง StartupPath เป็น
คำสั่งระบุว่ำ ฐำนข้อมูลนี้อยู่ภำยในโฟลเดอร์เดียวกันกับโปรแกรม และอยู่ภำยใน ซับโฟล์เดอร์ ที่ชื่อว่ำ database
Dim Conn As New OleDbConnection(strConn) ' เรียกใช้คำสั่ง ติดต่อฐำนข้อมูล
Dim ds As New DataSet 'กำหนดตัวแปรเป็นแบบดำต้ำเซ็ท ตัวแปรนี้แหละครับจะเป็นตัว refresh ข้อมูล
Private Sub form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim StrSql As String
StrSql = "SELECT * FROM MyTable " 'คำสั่ง SQL
Dim da As OleDbDataAdapter 'ตัวแปรนี้ก็คือ DataAdapter ที่คุณใช้ใน Tool ครับ
da = New OleDbDataAdapter(StrSql, Conn) 'เก็บข้อมูลจำกกำรเรียกใช้คำสั่ง SQL เข้ำมำใน DataAdapter
da.Fill(ds, "MyData") 'นำเข้ำมูล จำก DataAdapter มำเก็บไว้ ในดำต้ำเซ็ทที่ชื่อ ds ครับ ds เป็นดำต้ำเซ็ทที่ใช้ในกำรพักข้อมูลก่อนส่งเข้ำไปแสดงที่ดำต้ำกริด
Mydata เป็นชื่อที่ตั้งเพื่อสื่อควำมหมำยแทนข้อมูลในดำต้ำเซ็ทครับ
Me.DataGridView1.DataSource = ds.Tables("MyData") 'นำข้อมูลที่ได้มำแสดงที่ดำต้ำกริดครับ
End Sub

32. 32
End Class
ต่อไปก็จะเป็นกำร รีเฟรชข้อมูลครับ
ใช้คำสั่งนี้
If ds.Tables.Contains("MyData") Then 'ก็จะตรวจสอบ ข้อมูลค้ำงอยู่ใน ดำต้ำเซ็ทไหม ถ้ำมีค้ำงอยู่ใน รีมูฟ ออกก่อน
ds.Tables.Remove("MyData")
End If
ก็เป็นกำรตัดกำรผูกข้อมูลกับฐำนข้อมูล ถ้ำจะมีกำรดึงข้อมูลขึ้นมำอีกก็ทำตำมโค้ดข้ำงบนเหมือนเดิม คุณต้องทำควำมเข้ำใจกับ ตัวแปร ds หรือ ดำต้ำเซ็ทก่อนนะครับ ดำต้ำเซ็ท
เป็นตำรำงข้อมูลในรูปแบบ temporary ดูง่ำย ๆ เหมือนไฟล์เอ็กเซลที่เก็บไว้ในหน่วยควำมจำ ดำต้ำเซ็ทสำมำรถมีได้หลำยตำรำงเหมือนกับเอ็กเซลก็สำมำรถมีได้หลำย sheet คุณ
สำมำรถ fill เข้ำดำต้ำเซ็ทได้หลำยตำรำงก็ได้ เช่น da.Fill(ds, "MyData") หรือ da.Fill(ds, "MyData1 ") , da.Fill(ds, "MyDataN") จำก da หรือ DataAdapter ตัว
เดียวกันได้
Public Class frmMain
'By http://www.thaicreate.com (mr.win)'
Private Sub btnHome_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnHome.Click
Me.Hide()
Dim f As New frmHome
f.Show()
End Sub
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
If MessageBox.Show("Are you sure to exit?", "Confirm.", MessageBoxButtons.YesNo, MessageBoxIcon.Question,
MessageBoxDefaultButton.Button1) = DialogResult.Yes Then
Application.Exit()
End If
End Sub
End Class
Imports System.Data
Imports System.Data.SqlServerCe
Imports System.Data.SqlTypes

33. 33
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Public Class frmHome
'By http://www.thaicreate.com (mr.win)'
Private Sub frmHome_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
BindDataGrid()
End Sub
Private Sub BindDataGrid()
Dim myConnection As SqlCeConnection
Dim dt As New DataTable
Dim Adapter As SqlCeDataAdapter
'myConnection = New SqlCeConnection("Data Source =" + (System.IO.Path.GetDirectoryName(
System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase ) + "Database1.sdf;"))
myConnection = New SqlCeConnection("Data Source=C:WindowsFormsApplicationWindowsFormsApplicationDatabase1.sdf;")
myConnection.Open()
Dim myCommand As SqlCeCommand = myConnection.CreateCommand()
myCommand.CommandText = "SELECT [id], [name], [email] FROM [mytable]"
myCommand.CommandType = CommandType.Text
Adapter = New SqlCeDataAdapter(myCommand)
Adapter.Fill(dt)
myConnection.Close()
Me.dgName.DataSource = dt
Me.dgName.Columns.Clear()

34. 34
Dim column As DataGridViewTextBoxColumn
column = New DataGridViewTextBoxColumn()
column.DataPropertyName = "id"
column.HeaderText = "ID"
column.Width = 50
Me.dgName.Columns.Add(column)
column = New DataGridViewTextBoxColumn()
column.DataPropertyName = "name"
column.HeaderText = "Name"
column.Width = 100
Me.dgName.Columns.Add(column)
column = New DataGridViewTextBoxColumn()
column.DataPropertyName = "email"
column.HeaderText = "Email"
column.Width = 150
Me.dgName.Columns.Add(column)
dt = Nothing
End Sub
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
Me.Hide()
Dim f As New frmAdd
f.Show()
End Sub

35. 35
Private Sub btnEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEdit.Click
Me.Hide()
Dim f As New frmEdit()
f._strID = Me.dgName(0, Me.dgName.CurrentCell.RowIndex).Value.ToString()
f.Show()
End Sub
Private Sub btnDel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDel.Click
If MessageBox.Show("Are you sure to delete?", "Confirm.", MessageBoxButtons.YesNo, MessageBoxIcon.Question,
MessageBoxDefaultButton.Button1) = DialogResult.Yes Then
Dim strID As String = Me.dgName(0, Me.dgName.CurrentCell.RowIndex).Value.ToString()
Dim myConnection As SqlCeConnection
'myConnection = New SqlCeConnection("Data Source =" + (System.IO.Path.GetDirectoryName(
System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase ) + "Database1.sdf;"))
myConnection = New SqlCeConnection("Data Source=C:WindowsFormsApplicationWindowsFormsApplicationDatabase1.sdf;")
myConnection.Open()
Dim myCommand As SqlCeCommand = myConnection.CreateCommand()
myCommand.CommandText = "DELETE FROM [mytable] WHERE id = '" & strID & "'"
myCommand.CommandType = CommandType.Text
myCommand.ExecuteNonQuery()
myConnection.Close()
MessageBox.Show("Delete Successfully")
BindDataGrid()
End If
End Sub
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
Me.Hide()
Dim f As New frmMain

36. 36
f.Show()
End Sub
End Class
Imports System.Data
Imports System.Data.SqlServerCe
Imports System.Data.SqlTypes
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Public Class frmAdd
'By http://www.thaicreate.com (mr.win)'
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
If Me.txtName.Text = "" Then
MessageBox.Show("Please input (Name)")
Me.txtName.Focus()
Exit Sub
End If
If Me.txtEmail.Text = "" Then
MessageBox.Show("Please input (Email)")
Me.txtEmail.Focus()
Exit Sub
End If
Dim myConnection As SqlCeConnection
'myConnection = New SqlCeConnection("Data Source =" + (System.IO.Path.GetDirectoryName(
System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase ) + "Database1.sdf;"))

37. 37
myConnection = New SqlCeConnection("Data Source=C:WindowsFormsApplicationWindowsFormsApplicationDatabase1.sdf;")
myConnection.Open()
Dim myCommand As SqlCeCommand = myConnection.CreateCommand()
myCommand.CommandText = "INSERT INTO [mytable] ([name], [email]) VALUES " & _
" ('" & Me.txtName.Text & "','" & Me.txtEmail.Text & "' ) "
myCommand.CommandType = CommandType.Text
myCommand.ExecuteNonQuery()
myConnection.Close()
MessageBox.Show("Save Successfully.")
Me.Hide()
Dim f As New frmHome
f.Show()
End Sub
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
Me.Hide()
Dim f As New frmHome
f.Show()
End Sub
End Class
Imports System.Data
Imports System.Data.SqlServerCe
Imports System.Data.SqlTypes
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Public Class frmEdit

38. 38
'By http://www.thaicreate.com (mr.win)'
Dim strID As String = ""
Public Property _strID() As String
Get
Return strID
End Get
Set(ByVal value As String)
strID = value
End Set
End Property
Private Sub frmEdit_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim myConnection As SqlCeConnection
Dim dt As New DataTable
Dim Adapter As SqlCeDataAdapter
'myConnection = New SqlCeConnection("Data Source =" + (System.IO.Path.GetDirectoryName(
System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase ) + "Database1.sdf;"))
myConnection = New SqlCeConnection("Data Source=C:WindowsFormsApplicationWindowsFormsApplicationDatabase1.sdf;")
myConnection.Open()
Dim myCommand As SqlCeCommand = myConnection.CreateCommand()
myCommand.CommandText = "SELECT [id], [name], [email] FROM [mytable] WHERE id = '" & strID & "' "
myCommand.CommandType = CommandType.Text
Adapter = New SqlCeDataAdapter(myCommand)
Adapter.Fill(dt)
myConnection.Close()
If dt.Rows.Count > 0 Then
Me.txtName.Text = dt.Rows(0)("name")

39. 39
Me.txtEmail.Text = dt.Rows(0)("email")
End If
dt = Nothing
End Sub
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
If Me.txtName.Text = "" Then
MessageBox.Show("Please input (Name)")
Me.txtName.Focus()
Exit Sub
End If
If Me.txtEmail.Text = "" Then
MessageBox.Show("Please input (Email)")
Me.txtEmail.Focus()
Exit Sub
End If
Dim myConnection As SqlCeConnection
'myConnection = New SqlCeConnection("Data Source =" + (System.IO.Path.GetDirectoryName(
System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase ) + "Database1.sdf;"))
myConnection = New SqlCeConnection("Data Source=C:WindowsFormsApplicationWindowsFormsApplicationDatabase1.sdf;")
myConnection.Open()
Dim myCommand As SqlCeCommand = myConnection.CreateCommand()
myCommand.CommandText = "UPDATE [mytable] SET " & _
" [name] = '" & Me.txtName.Text & "', [email] = '" & Me.txtEmail.Text & "' " & _
" WHERE id = '" & strID & "' "
myCommand.CommandType = CommandType.Text
myCommand.ExecuteNonQuery()

40. 40
myConnection.Close()
MessageBox.Show("Update Successfully")
Me.Hide()
Dim f As New frmHome
f.Show()
End Sub
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
Me.Hide()
Dim f As New frmHome
f.Show()
End Sub
End Class