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Dataadapter with dataset - sql sever

SqlDataAdapter provides the communication between the Dataset and the Data Source with the help of SqlConnection Object . The SqlConnection Object has no information about the data it retrieves . Similarly a Dataset has no knowledge of the Data Source where the data coming from. So the SqlDataAdapter manage the communication between these two Objects.

The SqlDataAdapter object allows us to populate Data Tables in a DataSet. We can use Fill method of the SqlDataAdapter for populating data in a Dataset. The following source code shows a simple program that uses SqlDataAdapter to retrieve data from Data Source with the help of SqlConnection object and populate the data in a Dataset.




Imports System.Data.SqlClient
Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim connetionString As String
        Dim connection As SqlConnection
        Dim adapter As SqlDataAdapter
        Dim ds As New DataSet
        Dim i As Integer
		connetionString = "Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserName;Password=Password"
        connection = New SqlConnection(connetionString)
        Try
            connection.Open()
            adapter = New SqlDataAdapter("Your SQL Statement Here", connection)
            adapter.Fill(ds)
            connection.Close()
            For i = 0 To ds.Tables(0).Rows.Count - 1
                MsgBox(ds.Tables(0).Rows(i).Item(1))
            Next
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try
    End Sub
End Class






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