WCF异步操作未提供输出

Question

I am calling WCF Service in xamarin, below is my code

res = Task.Factory.FromAsync((asyncCallback, asyncState) =>
                               _client.BeginMagic(req, asyncCallback, asyncState),
                             (asyncResult) =>
                               _client.EndMagic(asyncResult),null ).Result;

if I use the Proxy class generated using Svcutil.exe this code gives perfect output. Now i have added ServiceReference to access the service. but it is not giving me output. see the screenshot , it shows children could not be evaluated.

Can anyone please help on this ?

Answer 1

假设您的方法名是GetRecords()那么可能会存在类似GetRecordsCompleted的事件，如果存在则必须将其绑定。由于在Silverlight项目中引用了WCF服务后，会为每个服务方法创建事件。在Xamarin中。