The datagrid has a predefined editColumn for handling the editing of a datagrid. Adding this simple column definition to a datagrid adds a powerful feature. When a row is not in edit mode the column item shows the word (or button dependant upon link type) Edit.  Clicking on this link will change the row into edit mode.  Convertng items into text boxes and changing the link edit to the two links update and delete.

To add an edit Button to a datagrid we need to add a few blocks of code. In the datagrid header In the column definitions of the datagrid add another column In the code behind add an event handler for the edit button In the code behind add an event handler for the update button In the code behind add an event handler for the cancel button Ensure that the postback is handled correctly   Datagrid header OnEditCommand="doPurchasingEdit" OnUpdateCommand="doPurchasingUpdate" OnDeleteCommand="doPurchasingDelete" Column definitions of the datagrid <asp:editcommandcolumn buttontype="LinkButton" UpdateText="Update" cancelText=Cancel" EditText="Edit"></ASP:EditCommandColumn> Code behind edit button event handler Sub myDataGridEdit(ByVal sender As Object, ByVal e As DataGridCommandEventArgs)     myDataGrid.EditItemIndex = e.Item.ItemIndex     BindDataGrid() End Sub 'myDataGridEdit Code behind update button  event handler Sub myDataGridCancel(ByVal sender As Object, ByVal e As DataGridCommandEventArgs)     myDataGrid.EditItemIndex = -1     BindPataGrid() End Sub 'dmyDataGridCancel Code behind cancel button  event handler Sub myDataGridUpdate(ByVal sender As Object, ByVal e As DataGridCommandEventArgs)     If e.CommandName = "Update" Then         Dim id As Integer = e.Item.Cells(0).Text         Dim name As String = CType(e.Item.FindControl("Name"), TextBox).Text         Dim description As String = CType(e.Item.FindControl("Description"), TextBox).Text         Dim price As String = CType(e.Item.FindControl("price"), TextBox).Text         'Create the appropriate SQL statement         Dim myConnection As SqlConnection         Dim myCommand As SqlCommand         Dim myDataReader As SqlDataReader         Dim strSQL As String         strSQL = "UPDATE table SET name = '" & name & "', description = '" & description & "', price = " &     price & " WHERE id = " & id         myConnection = New SqlConnection(ConfigurationSettings.AppSettings("MyDSN"))         myCommand = New SqlCommand(strSQL, myConnection)         Dim myDataSet As DataSet         myConnection.Open()         myDataReader = myCommand.ExecuteReader()         myConnection.Close()         'Rebind the DataGrid         myDataGrid.EditItemIndex = -1         BindmyDataGrid()         myDataGrid.Visible = True     End If End Sub Postback If IsPostBack = True Then Else     BindDataGrid() End if