This document provides steps to import MS Excel data into a SQL Server table using C#: 1. Design a SQL Server table to match the structure of the Excel data. 2. Write C# code that connects to the Excel file and SQL Server, clears any existing data from the SQL table, then bulk copies the Excel data into the SQL table. 3. Key aspects of the code include using OleDb to connect to and query the Excel data, and SqlBulkCopy to efficiently import the data into SQL Server.

1. By Chetan Dhamija
1
Steps
To
Import MS Excel Data to SQL
Server table
Using C# .Net

2. By Chetan Dhamija
2
If you already have data in MS Excel file, and want to migrate your MS Excel data to SQL Server table,
follow below steps
Step 1: Let’s take an example to import the data to SQL Server table, I am going to import student
information data from MS excel sheet to Student SQL table,
My Excel sheet structure is looks like
Step 2: Now design a Student table in SQL server
CREATE TABLE
(
STUDENT VARCHAR(64),
ROLLNO VARCHAR(16),
COURSE VARCHAR(32),
)
Your MS excel sheet and SQL table is ready, now it’s time to write c# code to import the excel sheet into
Student table

3. By Chetan Dhamija
3
Step 3: Add these two namespaces in your class file
using System.Data.OleDb;
using System.Data.SqlClient;
Step 4: Add below method in your class file, you can call this method from any other class and pass the
excel file path
public void importdatafromexcel(string excelfilepath)
{
//declare variables - edit these based on your particular situation
string ssqltable = "datamigrationtable";
// make sure your sheet name is correct, here sheet name is sheet1, so you
can change your sheet name if have different
string myexceldataquery = "select student,rollno,course from [sheet1$]";
try
{
//create our connection strings
string excelconnectionstring = @"provider=microsoft.jet.oledb.4.0;data
source=" + excelfilepath + "; extended properties=" + ""excel 8.0;
hdr=yes;"";
string ssqlconnectionstring = "server= mydatabaseservername;
userid=dbuserid; password=dbuserpassword; database=databasename;
connection reset=false";
//execute a query to erase any previous data from our destination table
string sclearsql = "delete from " + ssqltable;
SqlConnection sqlconn = new SqlConnection(ssqlconnectionstring);
SqlCommand sqlcmd = new SqlCommand(sclearsql, sqlconn);
sqlconn.Open();
sqlcmd.ExecuteNonQuery();
sqlconn.Close();
//series of commands to bulk copy data from the excel file into our sql
table
OleDbConnection oledbconn = new OleDbConnection(excelconnectionstring);
OleDbCommand oledbcmd = new OleDbCommand(myexceldataquery, oledbconn);
oledbconn.Open();
OleDbDataReader dr = oledbcmd.ExecuteReader();
SqlBulkCopy bulkcopy = new SqlBulkCopy(ssqlconnectionstring);
bulkcopy.DestinationTableName = ssqltable;
while (dr.Read())
{
bulkcopy.WriteToServer(dr);
}
oledbconn.Close();
}
catch (Exception ex)
{
//handle exception
}
}