public static void get_Depart_Desig(DropDownList ddlDepartment, DropDownList ddlDesignation) { ddlDesignation.Items.Clear(); DALDesignation objDALDesg = new DALDesignation(); EmpDesignation objEmDesg = new EmpDesignation(); DataSet ds = new DataSet(); objEmDesg.DepartmentId = ddlDepartment.SelectedValue.ToString(); ds = objDALDesg.GetDesigDetails(objEmDesg); if (ds.Tables[0].Rows.Count > 0) { ddlDesignation.DataSource = ds.Tables[0]; ddlDesignation.Items.Clear(); ddlDesignation.Items.Add(new ListItem("-Select-", "-1")); ddlDesignation.DataTextField = "Designation"; ddlDesignation.DataValueField = "Designation_Id"; ddlDesignation.DataBind(); } else { ddlDesignation.DataSource = null; ddlDesignation.DataBind(); } }