Programmatically update a bound checkbox in a GridView using an asp:ButtonField in ASP.NET 2005

Question

The GridView is bound to an Access Table, but I want to update the checkbox using the asp:ButtonField. The best I've been able to do is replace the checkbox with a string value. Below is the code I have now:

Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
    If e.CommandName = "check" Then
        'Enable Editing on the GridView
        GridView1.EditIndex = GridView1.SelectedIndex
        'Assign value to the row selected
        Dim index As Integer = Convert.ToInt32(e.CommandArgument)
        'Assign selected gridview row
        Dim selectedRow As GridViewRow = GridView1.Rows(index)
        'Assign checkbox cell as table cell
        Dim selectedCell As TableCell = selectedRow.Cells(0)

        'Assign a value to the checkbox, **but instead is replacing the checkbox**
        selectedCell.Text = "True"
    End If
End Sub

Answer 1

I think you need to use .FindControl().

The GridViewCell is not the same thing as a CheckBox control inside it. You code should probably look more like:

Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
    If e.CommandName = "check" Then
        'Enable Editing on the GridView
        GridView1.EditIndex = GridView1.SelectedIndex
        'Assign value to the row selected
        Dim index As Integer = Convert.ToInt32(e.CommandArgument)
        'Assign selected gridview row
        Dim checkBox As CheckBox = GridView1.Rows(index).FindControl("checkBoxIdGoesHere")

        checkBox.Checked = true 'or false or whatever based on your command.
    End If
End Sub