需要引入命名空间：

复制代码 代码如下:

using System.Net;

using System.IO;

函数内容：

复制代码 代码如下:

/// <summary>

/// 根据Url获得源文件内容

/// </summary>

/// <param name="url">合法的Url地址</param>

/// <returns></returns>

public static string GetSourceTextByUrl(string url)

{

WebRequest request = WebRequest.Create(url);

request.Timeout = 20000;//20秒超时

WebResponse response = request.GetResponse();

Stream resStream = response.GetResponseStream();

StreamReader sr = new StreamReader(resStream);

return sr.ReadToEnd();

}