6
我想從我的WCF數據服務返回自定義類。我的自定義類是:無法從WCF數據服務返回自定義類
[DataServiceKey("ID")]
public class Applist {
public int ID { get; set; }
public string Name { get; set; }
}
我的數據服務看起來像:
public static void InitializeService(IDataServiceConfiguration config)
{
config.RegisterKnownType(typeof(Applist));
config.SetEntitySetAccessRule("*", EntitySetRights.All);
config.SetServiceOperationAccessRule("GetApplications", ServiceOperationRights.AllRead);
}
[WebGet]
public IQueryable<Applist> GetApplications() {
var result = (from p in this.CurrentDataSource.Applications
orderby p.ApplicationName
group p by p.ApplicationName into g
select new Applist { ID = g.Min(p => p.id), Name = g.Key });
return result.AsQueryable();
}
然而,當我運行的服務,它給了我一個錯誤:
Request Error Request Error The server encountered an error processing the request.
The exception message is 'Unable to load metadata for return type
'System.Linq.IQueryable`1[ApplicationService.Applist]' of method
'System.Linq.IQueryable`1[ApplicationService.Applist] GetApplications()'
同樣的查詢完美運行在LINQPad中很好。
更名爲WCF數據服務在一年前.... – 2010-10-03 19:06:07
是否使用WCF數據服務使用VS 2010和ADO.Net數據服務在VS 2008 SP1有差別? – Ashish 2010-10-05 04:42:15
你有沒有得到任何解決方案? – genericuser 2011-08-02 21:30:14