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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