Silverlihgt Client调用WCF服务

很多人肯定在实际的应用开发中都被Silverlight调用WCF服务的相关操作折磨了一阵子。要想很好的掌握这一应用技巧，还是需要我们从不断的操作中去积累经验。在这里我们将会为大家详细介绍一下这方面的知识。

WCF工程中需要注意的地方：

1.新建一个crossdomain.xml文件，内容如下

< ?xml version="1.0" encoding="utf-8" ?>
< cross-domain-policy>
< allow-access-from domain="*" />
< !-- 意为：允许来自任意域名对本web服务站点的任意跨域访问，
如要限制跨域访问站点：可将"*"更改为相应域名，多个域名则为多个
< allow-access-from ... />节点 -->
< /cross-domain-policy>

2.修改web.config文件内容

< endpoint address="" binding="basicHttpBinding" contract="Demo.WCF.IService1">
< endpoint address="mex" binding="basicHttpBinding" contract="IMetadataExchange"/>

3.或app.config文件内容,增加basicHttpbinding绑定，默认的情况下可能会有其他的绑定

注意，在同一个服务接口上绑定不同协议的时候，地址一定要不一样

< endpoint address="" binding="basicHttpBinding" contract="Demo.WCF.IService1">
< endpoint address="ws" binding="wsHttpBinding" contract="Demo.WCF.IService1">
< endpoint address="mex" binding="basicHttpBinding" contract="IMetadataExchange"/>

因为目前Silverlight只支持basicHttpBinding

Silverlight工程需要注意的地方：

注意其address访问地址

< client>
< endpoint address="http://localhost:4584/Service1.svc" 
binding="basicHttpBinding"
bindingConfiguration="BasicHttpBinding_IService1" 
contract="ServiceReference1.IService1"
name="BasicHttpBinding_IService1" />
< /client>

实现Silverlight调用WCF服务代码如下：

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private void Button_Click(object sender, RoutedEventArgs e)
{
ServiceReference1.Service1Client client = new Demo.Slapp.
ServiceReference1.Service1Client();
client.GetDataAsync(9);
client.GetDataCompleted += new EventHandler< Demo.Slapp.
ServiceReference1.GetDataCompletedEventArgs>(client_GetDataCompleted);
client.CloseCompleted += new EventHandler< System.ComponentModel.
AsyncCompletedEventArgs>(client_CloseCompleted);
}
void client_GetDataCompleted(object sender, Demo.Slapp.
ServiceReference1.GetDataCompletedEventArgs e)
{
if (e.Error == null)
{
this.btnDemo.Content = e.Result;
}
else
{
this.btnDemo.Content = "eror";
}
}