C# 读取网页内容 Streamreader

Question

我需要像这样在流式阅读器中阅读网页的内容

www.example.com

<test>
<sample></sample>
</test>

我明白了：

System.IO.StreamReader StreamReader1 =
new System.IO.StreamReader("www.example.com");
string test = StreamReader1.ReadToEnd();

然后我得到这个错误代码

尝试访问该方法失败： System.IO.StreamReader..ctor(System.String)

Answer 1

试试WebClient，它更简单，您不必担心溪流和河流：

using (var client = new WebClient())
{
    string result = client.DownloadString("http://www.example.com");
    // TODO: do something with the downloaded result from the remote
    // web site
}

Answer 2

如果你想使用 StreamReader，这里是我正在使用的代码：

    const int Buffer_Size = 100 * 1024;


        WebRequest request = CreateWebRequest(uri);
        WebResponse response = request.GetResponse();
        result = GetPageHtml(response);

...

    private string GetPageHtml(WebResponse response) {
        char[] buffer = new char[Buffer_Size];
        Stream responseStream = response.GetResponseStream();
        using(StreamReader reader = new StreamReader(responseStream)) {
          int index = 0;
          int readByte = 0;
          do {
              readByte = reader.Read(buffer, index, 256);
              index += readByte;
          }
          while (readByte != 0);
          response.Close();
        }
        string result = new string(buffer);
        result = result.TrimEnd(new char[] {'\0'});
        return result;
    }