The DataView provides different views of the data stored in a DataTable. DataView can be used to sort, filter, and search data in a DataTable , additionally we can add new rows and modify the content in a DataTable. DataViews can be created and configured at 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 that DataTable.
We can sort single or multiple fields in a DataView , also we can specify the sort order like ASC (ascending) and DESC (descending) . The following example creates a View and apply sort on the column Product_Price in descending order. 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, "Sort DataView")
adapter.Dispose()
command.Dispose()
connection.Close()
dv = New DataView(ds.Tables(0), "Product_Price > 100", "Product_Price Desc", DataViewRowState.CurrentRows)
DataGridView1.DataSource = dv
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
End Class