How to Clear all control private void cleardata () { ddldropdown.ClearSelection(); txtFormulaID.Text = string.Empty; txtM1Heading.Text = string.Empty; txtM2Heading.Text = string.Empty; txtM3Heading.Text = string.Empty; txtM4Heading.Text = string.Empty; chkM1Req.Checked = false; chkM2Req.Checked = false; chkM3Req.Checked = false; chkM4Req.Checked = false; chkM5Req.Checked = false; chkM6Req.Checked = false; ...