protected void btnUpdate_Click(object sender, EventArgs e) { if (ViewState["GRNId"] != null) { GRNBLL obj = new GRNBLL(); bool isSaved = false; isSaved = obj.UpdateGRNNumber(new Guid(ViewState["GRNId"].ToString()), this.txtOldSystemGRNNo.Text, lblNewGRN.Text, ViewState["TrackingNo"].ToString()); if (isSaved == true) { this.lblMessage.Text = "Update Data Successfully."; this.btnUpdate.Enabled = false; return; } this.btnUpdate.Enabled = false; } else { this.lblMessage.Text = "Unable to update Data.Please try again"; return; } }