[Solved] Set TextBox as required based upon “selected” value of DropDownList
Add following code in SelectedIndexChanged event in .cs file protected void PositionShift_SelectedIndexChanged(object sender, EventArgs e) { if (PositionShift.SelectedIndex == 1 || PositionShift.SelectedIndex == 3 || PositionShift.SelectedIndex == 5) { RequisitionNumberLabel.Text = “*”; } else { RequisitionNumberLabel.Text = “Requisition Number”; } } Also, set Autopostback property of DropDownList to True. solved Set TextBox as required based … Read more