Find asp.net controls during a loop

Question

In a asp.net vb code are several panels with ids like pnl_TN1, pnl_TN2, pnl_TN3, ..., pnl_TNx. The panels are all visible = false .

How can I iterate from i =2 to 4 with setting pnl_TNi visible to true?

Answer 1

You can use FindControl:

For i As Integer = 2 To 4
    Dim ctrl = Me.FindControl("pnl_TN" & i)
    If ctrl IsNot Nothing Then
        ctrl.Visible = True
    End If
Next