Silverlight与WCF之间的通信(1)SL客户端定时请求WCF服务

这几天在做一个Silverlight的页面聊天工具，基本上从头看了一遍Silverlight和WCF相关的东西，也遇到了不少问题，刚开始是用Silverlight做了定时请求服务器的数据信息，后期准备利用WCF的双工通信来做，通信过程分为两个部分记录。

一 ，需要建立一个WCF的服务端

这里直接在Silverlight的站点中新建了一个WCF服务，代码如下：

代码

public partial class MainPage : UserControl
{
Timer timer;
ChatService.ChatServiceClient proxy;

BasicHttpBinding binding;
EndpointAddress endPoint;

public MainPage()
{
InitializeComponent();

binding = new BasicHttpBinding();
endPoint = new EndpointAddress("http://localhost:1939/ChatService.svc%22);

timer = new Timer(new TimerCallback(GetMessages),this,100,100);
}

#region 定时检测信息
public void GetMessages(object obj)
{
proxy = new ChatService.ChatServiceClient(binding, endPoint);
proxy.GetMessagesCompleted += new EventHandler<ChatService.GetMessagesCompletedEventArgs>(GetMessagesComleted);
proxy.GetMessagesAsync("wengyuli");
}

void GetMessagesComleted(object sender, ChatService.GetMessagesCompletedEventArgs e)
{
if(e.Error==null)
{
if (this.listMsgs.Dispatcher.CheckAccess())
{
this.listMsgs.ItemsSource= e.Result;
}
else
{
this.listMsgs.Dispatcher.BeginInvoke(() => { this.listMsgs.ItemsSource = e.Result; });
}
}
}
#endregion

#region 发送信息
private void btnSend_Click(object sender, RoutedEventArgs e)
{
ChatService.MessageInfo message = new ChatService.MessageInfo();
message.ID = Guid.NewGuid().ToString();
message.Receipt = 0;
message.ReceiveMode = "user";
message.ReceiveOrgan = "";
message.ReceiveUser = "xiejianjun";
message.Message = this.txtMessage.Text;
message.Sender = "wengyuli";
message.SendTime = DateTime.Now;
message.Source = "web";
message.State = 0;
message.Title = this.txtMessage.Text;

proxy = new ChatService.ChatServiceClient(binding, endPoint);
proxy.SendMessageCompleted += new EventHandler<ChatService.SendMessageCompletedEventArgs>(SendMessageComleted);

proxy.SendMessageAsync(message);
}
void SendMessageComleted(object sender,ChatService.SendMessageCompletedEventArgs e)
{
if (e.Error == null)
{
//MessageBox.Show("服务器返回结果：" + e.Result);
}
}
#endregion
}

前台：

<ListBox Height="213" HorizontalAlignment="Left" DisplayMemberPath="Message" ItemsSource="{Binding MessageInfo}" Name="listMsgs" VerticalAlignment="Top" Width="283" ></ListBox>

编译并运行后得到数据：