silverlight中获取网页代码示例

概述在silverlight中如果要跨域访问，则需要在被访问网站的根目录下添加策略文件crossdomain.xml。内容如下（可以更细致配置，可以查阅相关资料）：  <?xml version="1.0"?><!-- http://localhost/crossdomain.xml --><cross-domain-policy> <allow-access-from domain

在silverlight中如果要跨域访问，则需要在被访问网站的根目录下添加策略文件crossdomain.xml。内容如下（可以更细致配置，可以查阅相关资料）：

 <?xml version="1.0"?><!-- http://localhost/crossdomain.xml --><cross-domain-policy> <allow-access-from domain="*" /></cross-domain-policy>

 

在silverlight中使用webclIEnt来获取网页内容，这里我简单封装了一个类。

需要using System.Net;

 

  public class SuperWebRequest { public SuperWebRequest(string url,Delegate onComplete) { requestURL = url; webClIEntOnCompet = onComplete; webClIEnt.DownloadStringCompleted += new DownloadStringCompletedEventHandler(webClIEnt_DownloadStringCompleted); Random rand = new Random(); bool add_flag = false; for (int i = 0; i < url.Length; i++) { if (url[i] == '?') { add_flag = true; break; } } Uri endpoint; if (add_flag) endpoint = new Uri(url + "&rand=" + rand.Next()); else endpoint = new Uri(url + "?rand=" + rand.Next());//添加随机数防止缓存 webClIEnt.DownloadStringAsync(endpoint); } private voID webClIEnt_DownloadStringCompleted(object sender,DownloadStringCompletedEventArgs e) { if (!e.Cancelled && e.Error == null) { //回调 Super.objMainPage.dispatcher.BeginInvoke(webClIEntOnCompet,e.Result.ToString()); } else { MessageBox.Show("web通信异常" + e.Error.Message.ToString()); } } private WebClIEnt webClIEnt = new WebClIEnt(); private Delegate webClIEntOnCompet; private string requestURL; }

 

使用方法：

 

定义带模板委托

    public delegate voID DelegateSingleParam<T>(T t);

 

调用

                SuperWebRequest myWebRequest = new SuperWebRequest(
                    Config.Webroot+"lastvolumn.xml",new DelegateSingleParam<string>(OnLoadLastVolumn));

 

回调: data即网页代码

        private voID OnLoadLastVolumn(string data)        {                    }

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