1 public static void InitDropDownList(DropDownList ddl, bool isAddTopItem, DropDownList ddlSub, object ddlDataSource, string ddlTextField, string ddlValueField) 2 { 3     ddl.DataSource = ddlDataSource; 4     ddl.DataTextField = ddlTextField; 5     ddl.DataValueField = ddlValueField; 6     ddl.DataBind(); 7     if (isAddTopItem) 8         ddl.Items.Insert(0, new ListItem("--All--", "0")); 9     if (ddlSub != null)10         ddlSub.Items.Insert(0, new ListItem("--All--", "0"));11 }

1 XXClass.InitDropDownList(ddlAvailableFieldEnter, false, null, new string[]{"field1","field2","field3"}, "", "");