Silverlight与WCF之间的通信(1)SL客户端定时请求WCF服务

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flydragon0815 2011-12-05 00:20:35 博主文章分类：C#

文章标签 职场休闲 silverlight Silverlight与WCF之间的通信 文章分类 .Net 后端开发

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：

Silverlight与WCF之间的通信(1)SL客户端定时请求WCF服务 _Silverlight与WCF之间的通信_02

代码

//先定义服务契约

[ServiceContract]
public interface IChatService
{
[OperationContract]
bool SendMessage(MessageInfo msg);

[OperationContract]
List<MessageInfo> GetMessages(string UserAccount);
}

//再定义数据契约

[DataContract]
public class MessageInfo
{
[DataMember]
public string ID { set; get; }
[DataMember]
public string Title { set; get; }
[DataMember]
public string Message { set; get; }
[DataMember]
public DateTime SendTime { set; get; }
[DataMember]
public DateTime? ReadTime { set; get; }
[DataMember]
public string Sender { set; get; }
[DataMember]
public string ReceiveUser { set; get; }
[DataMember]
public string ReceiveOrgan { set; get; }
[DataMember]
public string ReceiveMode { set; get; }
[DataMember]
public int State { set; get; }
[DataMember]
public int Receipt { set; get; }
[DataMember]
public string Source { set; get; }

}

//最后在webconfig中配置好服务

<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="ChatBehavior">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service behaviorConfiguration="ChatBehavior" name="WebChat.Web.ChatService">
<endpoint address="" binding="basicHttpBinding" contract="WebChat.Web.IChatService"></endpoint>
</service>
</services>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>

到这里呢，一个服务就Host在IIS上了，可以通过浏览服务或服务引用进行验证服务是否正常运行。

二，在Silverlight中向服务器请求数据

Silverlight与WCF之间的通信(1)SL客户端定时请求WCF服务 _silverlight_05

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
}

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