如何从 URL 获取数据并将其保存到 C#.NET 中的二进制文件中，而不会出现编码混乱？
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How to GET data from an URL and save it into a file in binary in C#.NET without the encoding mess?
提问by jms
In C#.NET, I want to fetch data from an URL and save it to a file in binary.
在 C#.NET 中，我想从 URL 获取数据并将其保存到二进制文件中。
Using HttpWebRequest/Streamreader to read into a string and saving using StreamWriter works fine with ASCII, but non-ASCII characters get mangled because the Systems thinks it has to worry about Encodings, encode to Unicode or from or whatever.
使用 HttpWebRequest/Streamreader 读入字符串并使用 StreamWriter 保存在 ASCII 中工作正常，但非 ASCII 字符会被损坏，因为系统认为它必须担心编码、编码为 Unicode 或来自或其他。
What is the easiest way to GET data from an URL and saving it to a file, binary, as-is?
从 URL 获取数据并将其按原样保存到文件、二进制文件的最简单方法是什么？
// This code works, but for ASCII only
String url = "url...";
HttpWebRequest request = (HttpWebRequest)
WebRequest.Create(url);
// execute the request
HttpWebResponse response = (HttpWebResponse)
request.GetResponse();
// we will read data via the response stream
Stream ReceiveStream = response.GetResponseStream();
StreamReader readStream = new StreamReader( ReceiveStream );
string contents = readStream.ReadToEnd();
string filename = @"...";
// create a writer and open the file
TextWriter tw = new StreamWriter(filename);
tw.Write(contents.Substring(5));
tw.Close();
采纳答案by Marc Gravell
Minimalist answer:
极简回答：
using (WebClient client = new WebClient()) {
client.DownloadFile(url, filePath);
}
Or in PowerShell (suggested in an anonymous edit):
或者在 PowerShell 中（建议匿名编辑）：
[System.Net.WebClient]::WebClient
$client = New-Object System.Net.WebClient
$client.DownloadFile($URL, $Filename)
回答by Matthew Flaschen
Just don't use any StreamReader or TextWriter. Save into a file with a raw FileStream.
只是不要使用任何 StreamReader 或 TextWriter。使用原始 FileStream 保存到文件中。
String url = ...;
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);
// execute the request
HttpWebResponse response = (HttpWebResponse) request.GetResponse();
// we will read data via the response stream
Stream ReceiveStream = response.GetResponseStream();
string filename = ...;
byte[] buffer = new byte[1024];
FileStream outFile = new FileStream(filename, FileMode.Create);
int bytesRead;
while((bytesRead = ReceiveStream.Read(buffer, 0, buffer.Length)) != 0)
outFile.Write(buffer, 0, bytesRead);
// Or using statement instead
outFile.Close()
回答by Aviatrix
This is what I use:
这是我使用的：
sUrl = "http://your.com/xml.file.xml";
rssReader = new XmlTextReader(sUrl.ToString());
rssDoc = new XmlDocument();
WebRequest wrGETURL;
wrGETURL = WebRequest.Create(sUrl);
Stream objStream;
objStream = wrGETURL.GetResponse().GetResponseStream();
StreamReader objReader = new StreamReader(objStream, Encoding.UTF8);
WebResponse wr = wrGETURL.GetResponse();
Stream receiveStream = wr.GetResponseStream();
StreamReader reader = new StreamReader(receiveStream, Encoding.UTF8);
string content = reader.ReadToEnd();
XmlDocument content2 = new XmlDocument();
content2.LoadXml(content);
content2.Save("direct.xml");
