protected void Page_Load(object sender, EventArgs e) { this.employeeTollId = Common.GetEncryptedQueryStringValue("employeeTollId", 0); this.employeeId = Common.GetEncryptedQueryStringValue("employeeId", 0); this.vehicleId = Common.GetEncryptedQueryStringValue("vehicleId", 0); ViewState["employeeVehicleId"] = Common.GetEncryptedQueryStringValue("employeeVehicleId", 0); LabelPageTitle.Text = String.Format("{0} {1}", "Employee Toll", Employee.GetEmployeeByEmployeeId(this.employeeId).FormattedNameNumber); PanelError.Visible = false; Page.Form.DefaultFocus = DropDownListVehicle.ClientID; Page.Form.DefaultButton = ButtonSave.UniqueID; if (this.employeeId != 0) { BindGridviewResult(); } if (!IsPostBack) { DropDownListVehicle.Focus(); BindPaymentType(); BindVehicle(); //ViewState["employeeTollId"] = employeeTollId; if (this.employeeTollId != 0) { BindEmployeeToll(); } if (this.vehicleId != 0) { DropDownListVehicle.Items.FindByValue(this.vehicleId.ToString()).Selected = true; } if (ViewState["employeeId"] != null) { this.employeeId = Convert.ToInt32(ViewState["employeeId"].ToString()); } } }