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ADO.NETObjects
 

ADO.NETObjects

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    ADO.NETObjects ADO.NETObjects Presentation Transcript

    • ADO.NET Objects
      SqlCommand
      SqlConnection
      SqlDataReader
      SqlDataAdapter
      DataTable
      DataSet
      DataView
    • ADO.NET Objects
      • Connection helps you identify
      Database Server
      Database Name
      Password
      UserName
      SqlConnection
      Database
    • ADO.NET Objects
      SqlConnection con= new SqlConnection (“Data Source=(local);Initial
      Catalog=Master; Integrated Security=SSPI”);
      SqlConnection con= new SqlConnection (“Server=<Servername>;Data
      Source=(local);uid=<SqlServerUserId>;Pwd=<SqlServer Password>”);
    • ADO.NET Objects
      • Various methods available in SqlConnection Object
      • Open()
      • Opens the connection to our database
      • Close()
      • Closes the database connection
      • Dispose()
      • Releases the resources on the connection object
    • ADO.NET Objects
      • SqlCommand
      • Used to execute commands to a database across a data
      connection
      • Send SQL statements to the database to perform certain action
      • What type of interaction you want to perform with a database
      Select
      Insert
      Delete
      Update
      SqlConnectioncon=new SqlConnection(“Data Source=(local);Initial
      Catalog=Master; Integrated Security=SSPI”);
      Con.Open();
      SqlCommandcmd=newSqlCommand(“select * from student”,con);
      Con.Close();
    • ADO.NET Objects
      • Various Methods Available in SqlCommand Object
      • ExecuteNonQuery()
      • Expects to run a command or a stored procedure
      • ExecuteScalar()
      • Returns only one value after executing the query
      • ExecuteReader()
      • Expects to run a query command or a stored procedure
      that SELECTS records
    • ADO.NET Objects
      • SqlDataReader
      • Provides a forward-only, read-only, connected stream record set
      from a database
      • Returned as the result of the Commandobject's ExecuteReader()
      SqlCommandcmd=new SqlCommand(“select * from student” , con);
       
      SqlDataReaderre=cmd . ExecuteReader();
    • ADO.NET Objects
      • Basic Methods available in SqlDataReader Object
      • Read()
      • Used to move the Record Pointer to the first row which
      allows the data to be read by the column name or the index
      position
      • HasRow()
      • Checks if any data exists, and it is used instead of the Read()
      • Close()
      • Used to close the SqlDataReader()