首先在绑定的时候进行转换: public class RegionConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { var name = value as string; var filter = parameter as string; if (string…
var list = (from province in db.Areas && province.IsDel == join city in db.Areas on province.ID equals city.ParentId into citys from ci in citys.DefaultIfEmpty() join area in db.Areas on ci.ID equals area.ParentId into areas select new { ID = prov…