Question

我有一个针对我的windowsphone应用程序的书面数据服务，我正在尝试将更改保存到此数据服务。为此，我致电BeginSaveChanges：

    Context.AddToMeasurements(temp);
    Context.BeginSaveChanges(SaveChangesOptions.Batch, SaveChangesComplete, Context);

调用EndSaveChanges时，此函数的回调会返回错误。

private void SaveChangesComplete(IAsyncResult result)
{
    // use a dispatcher to make sure the async void 
    // returns on the right tread.
    Deployment.Current.Dispatcher.BeginInvoke(() =>
    {

        DataServiceResponse WriteOperationResponse = null;

        Context = result.AsyncState as MeasurementEntities;

        try
        {
             WriteOperationResponse = Context.EndSaveChanges(result);
             Debug.WriteLine("Batch State:");
             Debug.WriteLine(WriteOperationResponse.BatchStatusCode);
        }
        catch (DataServiceRequestException ex)
        {

            Debug.WriteLine(ex.Message);
        }
        catch (InvalidOperationException ex)
        {
            Debug.WriteLine(ex.Message);
        }

    });        
}

endsavechanges返回的错误：

An exception of type 'System.Data.Services.Client.DataServiceClientException' occurred in Microsoft.Data.Services.Client.WP80.DLL and wasn't handled before a managed/native boundary
An exception of type 'System.Data.Services.Client.DataServiceRequestException' occurred in Microsoft.Data.Services.Client.WP80.DLL and wasn't handled before a managed/native boundary
A first chance exception of type 'System.Data.Services.Client.DataServiceRequestException' occurred in Microsoft.Data.Services.Client.WP80.DLL
An exception of type 'System.Data.Services.Client.DataServiceRequestException' occurred in Microsoft.Data.Services.Client.WP80.DLL and wasn't handled before a managed/native boundary
An error occurred while processing this request.

我希望看到有关这些错误的更详细信息，或者如果有人知道它们的含义也会被认可，但我如何在Visual Studio中完成（有关数据服务的更多细节）？

ps，我已经添加了：

config.UseVerboseErrors = true;

和

[ServiceBehavior(IncludeExceptionDetailInFaults = true)]

到我的dataservice。

请帮助：）

编辑：

当我删除Try构造并执行EndSaveChanges方法时。我可以阅读innerExeptions，它是：

当IDENTITY_INSERT设置为OFF时，无法在表'Measurement'中为identity列插入显式值。

任何想法是什么意思？

Answer 1

当IDENTITY_INSERT设置为OFF时，无法在表'Measurement'中为identity列插入显式值。

这意味着您没有将任何值传递给Measurement列，它是数据库中的必填字段。你需要传递价值。

如何调试WCF数据服务

1 个答案: