WebRequest 擷取網頁亂碼

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問題：在用WebRequest擷取網頁源碼時得到的源碼是亂碼。

原因：1，編碼不對

解決辦法：設定對應編碼

WebRequest request = WebRequest.Create(Url);
WebResponse response = await request.GetResponseAsync();

Stream stream = response.GetResponseStream();
StreamReader reader = new StreamReader(stream, Encoding.GetEncoding(coding));//這裡的coding是頁面的編碼，可以用Ie右鍵查看編碼。
Result = reader.ReadToEnd();

reader.Dispose();
reader.Dispose();

2，頁面進行壓縮了

看看html的head,ContentEncoding是否是gzip如果是的話需要解壓。//下面的代碼是在winrt下的

　　　　　　WebRequest request = WebRequest.Create(Url);
                WebResponse response = await request.GetResponseAsync();
                Debug.WriteLine(((HttpWebResponse)response).StatusDescription);
                if (response.Headers.AllKeys.Contains("Content-Encoding") && response.Headers["Content-Encoding"].ToLower() == "gzip")//如果使用了GZip則先解壓
                {
                    using (System.IO.Stream streamReceive = response.GetResponseStream())
                    {
                        using (var zipStream =
                            new System.IO.Compression.GZipStream(streamReceive, System.IO.Compression.CompressionMode.Decompress))
                        {
                            using (StreamReader sr = new System.IO.StreamReader(zipStream, Encoding.GetEncoding(coding)))
                            {
                                Result = sr.ReadToEnd();
                            }
                        }
                    }
                }