protected void btnUpdate_Click(object sender, EventArgs e) { oStud = new clsStudent(); lblMessage.Visible = false; int i = oStud.ReplacePRN(txtPRN.Text.Trim(), txtReplacePRN.Text.Trim(), user.User_ID); if (i > 0) { lblMessage.Text = "PRN Repalced"; lblMessage.CssClass = "saveNote"; lblMessage.Visible = true; } else { lblMessage.Text = "Error while replacing PRN"; lblMessage.CssClass = "errorNote"; lblMessage.Visible = true; } }