我按如下方式下载网页。我想将其保存为UTF-8文本。但是如何?
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
using (HttpWebResponse resp = (HttpWebResponse)req.GetResponse())
{
Encoding enc = Encoding.GetEncoding(resp.CharacterSet);
Encoding utf8 = Encoding.UTF8;
using (StreamWriter w = new StreamWriter(new FileStream(pathname, FileMode.Create), utf8))
{
using (StreamReader r = new StreamReader(resp.GetResponseStream()))
{
// This works, but it's bad because you read the whole response into memory:
string s = r.ReadToEnd();
w.Write(s);
// This doesn't work :(
char[] buffer = new char[1024];
int n;
while (!r.EndOfStream)
{
n = r.ReadBlock(buffer, 0, 1024);
w.Write(utf8.GetChars(Encoding.Convert(enc, utf8, enc.GetBytes(buffer))));
}
// This means that r.ReadToEnd() is doing the transcoding to UTF-8 differently.
// But how?!
}
}
return resp.StatusCode;
}
请勿阅读本段。正是在这里发出关于太多代码消失的警告信息。
答案 0 :(得分:7)
您可以简单地使用WebClient类。它支持编码和更容易使用:
WebClient webClient = new WebClient();
webClient.Encoding = System.Text.Encoding.UTF8;
webClient.DownloadFile(url, "file.txt");