从网页下载源代码时遇到问题

Question

我正在尝试使用 c# 下载此网页的源代码，用于学校项目。
这是我想要获取的页面：
http://www.epicurious.com/tools/fooddictionary/entry?id=1650

我已经尝试过诸如

 HttpWebRequest request = (HttpWebRequest)
            WebRequest.Create("http://www.epicurious.com/tools/fooddictionary/entry?id=1650");

和 by using 之

 WebClient client = new WebClient();
string value = client.DownloadString("http://www.epicurious.com/tools/fooddictionary/entry?id=1650");

类的代码，但两种方法都无法获取页面源代码。任何帮助将不胜感激。

Answer 1

使用 HttpWebRequest.Create

try
{
    WebRequest req = HttpWebRequest.Create("http://www.epicurious.com/tools/fooddictionary/entry?id=1650");
    req.Method = "GET";

    string source;
    using (StreamReader reader = new StreamReader(req.GetResponse().GetResponseStream()))
    {
        source = reader.ReadToEnd();
    }
}
catch (Exception ex)
{
    //Log the exception 
    MessageBox.Show(ex.ToString());
}

使用 DownloadString

WebClient client = new WebClient();
string reply = client.DownloadString("http://www.epicurious.com/tools/fooddictionary/entry?id=1650");

以上方法对我来说效果很好。检查是否有异常..

Answer 2

这个怎么样...

string sourceCode = "";
Uri site = new Uri("http://www.epicurious.com/tools/fooddictionary/entry?id=1650");
WebRequest request = WebRequest.Create(site);
using(StreamReader reader = new StreamReader(request.GetResponse().GetResponseStream(), Encoding.ASCII)){
    sourceCode = reader.ReadToEnd();
}

“using”语句将为您关闭您的流。注意：在流上调用 close 也会在它正在使用的任何流上调用类，这就是为什么您只需要单个 using 语句