silverlight正在调用WCF服务，但未传递参数

Question

I have a WCF service in a project with the following setup

//interface

namespace AttendanceSystem
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
    [ServiceContract]
    public interface IService1
    {
        [OperationContract]
        void DoWork(string s);
    }
}

// and the following implementation

namespace AttendanceSystem
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
    public class Service1 : IService1
    {
        public void DoWork(string s)
        {
            StreamWriter file = new StreamWriter(@"C:\users\waqasjafri\desktop\test.txt");
            if (s == null)
            {
                file.WriteLine("value is null");
            }
            else
            {
                file.WriteLine("value is not null");
            }
            file.Close();
        }
    }
}

Here is the web.config file in the website application part of my solution that pertains to the wcf service

  <system.serviceModel>
<behaviors>
  <serviceBehaviors>
    <behavior name="">
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="true" />
    </behavior>
  </serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />

and the ServiceReference.clientconfig file in the silverlight project

<configuration>
<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding name="BasicHttpBinding_IService1" maxBufferSize="2147483647"
                maxReceivedMessageSize="2147483647">
                <security mode="None" />
            </binding>
        </basicHttpBinding>
    </bindings>
    <client>
        <endpoint address="http://localhost:48886/Service1.svc" binding="basicHttpBinding"
            bindingConfiguration="BasicHttpBinding_IService1" contract="ServiceReference1.IService1"
            name="BasicHttpBinding_IService1" />
    </client>
</system.serviceModel>

//here is the calling code ... it is in an event that gets triggered on a button click

ServiceReference1.Service1Client obj = new ServiceReference1.Service1Client();
obj.DoWorkAsync("Test");

The parameter is always being passed as null. what is going wrong? I can't figure it out since I'm new to integrating WCF/silverlight/Asp.net.

Answer 1

Update your service reference again. Try like this, In silverlight your method should have a completed event,

  ServiceReference1.Service1Client client = new ServiceReference1.Service1Client();
            client.DoWorkCompleted += (a, ae) =>
            { 

            };
            client.DoWorkAsync("Test");

Answer 2

You might be exceeding the maxStringContentLength which is 8192 by default. See here:

http://msdn.microsoft.com/en-us/library/ms731361(v=vs.110).aspx

http://msdn.microsoft.com/en-us/library/ms731325(v=vs.110).aspx

You may want to consider using binary message encoding as well.