window phone WebClient和HttpWebRequest 并解决gb2312乱码问题

1.WebClient类

在System.Net空间下，提供向URI标识的目标发送数据和从URI标识的目标接收数据的类。

获取数据通过OpenReadAync，完成时OpenReadCompleted

private void DoWebClient()

{

string url = "http://www.qq.com";

WebClient client = new WebClient();

client.OpenReadAsync(new Uri(url));

client.OpenReadCompleted += new OpenReadCompletedEventHandler(WebClient_OpenReadCompleted);

}

private void WebClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)

{

using (StreamReader reader = new StreamReader(e.Result,DBCSCodePage.DBCSEncoding.GetDBCSEncoding("gb2312")))

{

string contents = reader.ReadToEnd();

int begin = contents.ToString().IndexOf("<title>");

int end = contents.ToString().IndexOf("</title>");

//UI线程调用，直接更新界面

ClientText.Text = contents.ToString().Substring(begin + 7, end - begin - 7);

}

}

2.HttpWebRequest 类

在System.Net空间下，提供WebRequest类的HTTP的实现

private void DoHttpWebRequest()

{

string url = "http://www.baidu.com";

WebRequest request = HttpWebRequest.Create(url);

IAsyncResult result = request.BeginGetResponse(ResponseCallBack, request);

}

private void ResponseCallBack(IAsyncResult result)

{

HttpWebRequest req = result.AsyncState as HttpWebRequest;

WebResponse res = req.EndGetResponse(result);

using(Stream stream=res.GetResponseStream())

using (StreamReader reader = new StreamReader(stream, DBCSCodePage.DBCSEncoding.GetDBCSEncoding("gb2312")))

{

string contents = reader.ReadToEnd();

int begin = contents.ToString().IndexOf("<title>");

int end = contents.ToString().IndexOf("</title>");

//基于后台运行，不在UI线程

Dispatcher.BeginInvoke(() => { ReqText.Text = contents.ToString().Substring(begin + 7, end - begin - 7); });

}

}

ps:DBCSCodePage就是用来解决乱码问题的

源码：http://download.csdn.net/detail/wulongtiantang/5072852