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How to create a DataView

The DataView provides different views of the data stored in a DataTable. DataView can be used to sort, filter, and search in a DataTable , additionally we can add new rows and modify the content in a DataTable. DataViews can be created and configured both design time and run time . Changes made to a DataView affect the underlying DataTable automatically, and changes made to the underlying DataTable automatically affect any DataView objects that are viewing the DataTable.

We can create DataView in two different ways. We can use the DataView constructor, or you can create a reference to the DefaultView property of the DataTable. The DataView constructor can be empty, or it can take either a DataTable as a single argument, or a DataTable along with filter criteria, sort criteria, and a row state filter.

dataView = dataSet.Tables(0).DefaultView

The following source code shows how to create a DataView in VB.NET. Create a new VB.NET project and drag a DataGridView and a Button on default Form Form1 , and copy and paste the following Source Code on button click event.




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 command As SqlCommand
        Dim adapter As New SqlDataAdapter
        Dim ds As New DataSet
        Dim dv As DataView
        Dim sql As String
		connetionString = "Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserName;Password=Password"
        sql = "Select  * from product"
        connection = New SqlConnection(connetionString)
        Try
            connection.Open()
            command = New SqlCommand(sql, connection)
            adapter.SelectCommand = command
            adapter.Fill(ds, "Create DataView")
            adapter.Dispose()
            command.Dispose()
            connection.Close()

            dv = ds.Tables(0).DefaultView
            DataGridView1.DataSource = dv

        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try
    End Sub
End Class






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