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How to Filter DataView

DataView enables you to create different views of the data stored in a DataTable. That is we can customize the views of data from a DataTable. DataView can be used to sort, filter, and search a DataTable , additionally we can add new rows and modify the content in a DataTable. We can create DataView in two ways. Either we can use the DataView constructor, or we can create a reference to the DefaultView property of the DataTable. Also we can create multiple DataViews for any given DataTable.

The following source code creates a view that shows all Product Details where the Product Price less than 500. 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, "Filter DataView")
            adapter.Dispose()
            command.Dispose()
            connection.Close()

            dv = New DataView(ds.Tables(0), "Product_Price < = 500", "Product_Name", DataViewRowState.CurrentRows)
            DataGridView1.DataSource = dv

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




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