Question

我试图使用c＃为学校项目下载此网页的源代码这是我试图得到的页面：
http://www.epicurious.com/tools/fooddictionary/entry?id=1650

我尝试过像

这样的代码

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

并使用

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

这两种方法都没有让我获得页面来源。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");

以上方法对我来说很好。检查异常，如果有..

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”语句将为您关闭流。注意：在流上调用close也会调用它正在使用的任何流上的类，这就是为什么你只需要单个using语句

麻烦从网页下载源代码

2 个答案: