当参数超过一定（小）数量时服务调用失败

Question

我的 Silverlight 应用程序中有一个 Web 服务调用，当参数中的项目数约为 2500 时，该调用失败。有人知道发生了什么事吗？

该参数被声明为一个可观察的集合：

var pointIds = new System.Collections.ObjectModel.ObservableCollection<int>();

我这样称呼它：

client.ServiceClient.MarkAllPointAsFavouriteAsync(Settings.Current.User.UserId,pointIds);

服务调用的定义如下：

public void MarkAllPointAsFavourite(Guid userId, List<int> pointIds)
    {
        PointRepository.MarkAllPointAsFavourite(userId, pointIds);
    }

为什么在使用大约 2500 个整数的列表进行调用时会失败？

给出的错误是：

System.ServiceModel.CommunicationException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound.
   at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
   at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
   at System.Net.Browser.AsyncHelper.<>c__DisplayClass4.<BeginOnUI>b__1(Object sendState)
   --- End of inner exception stack trace ---
   at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
   at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result)
   --- End of inner exception stack trace ---
   at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result)
   at Conwx.Net.Client.Framework.CustomerServiceReference.CustomerServiceClient.CustomerServiceClientChannel.EndMarkAllPointAsFavourite(IAsyncResult result)
   at Conwx.Net.Client.Framework.CustomerServiceReference.CustomerServiceClient.Conwx.Net.Client.Framework.CustomerServiceReference.ICustomerService.EndMarkAllPointAsFavourite(IAsyncResult result)
   at Conwx.Net.Client.Framework.CustomerServiceReference.CustomerServiceClient.OnEndMarkAllPointAsFavourite(IAsyncResult result)
   at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)}

Answer 1

为什么调用大约 2500 个整数的列表时会失败？

我发现它在列表中大约有 2100 个项目时失败。这是因为它正在构建一个查询。

在这种情况下，由于您没有返回任何内容，因此您可以通过将定义更改为可调用该方法：

[Invoke]
public void MarkAllPointAsFavourite(Guid userId, List<int> pointIds)
{
    PointRepository.MarkAllPointAsFavourite(userId, pointIds);
}

这回避了限制。

您还必须稍微修改调用代码。