C# 更改FileStream写入编码类型
这是我的代码:C# 更改FileStream写入编码类型,c#,asp.net,file,encoding,character-encoding,C#,Asp.net,File,Encoding,Character Encoding,这是我的代码: public static string DownloadFile(string FtpUrl, string FileNameToDownload, string userName, string password, string tempDirPath) { string ResponseDescription = ""; string PureFileName = new FileInfo(Fil
public static string DownloadFile(string FtpUrl, string FileNameToDownload,
string userName, string password, string tempDirPath)
{
string ResponseDescription = "";
string PureFileName = new FileInfo(FileNameToDownload).Name;
string DownloadedFilePath = tempDirPath + "/" + PureFileName;
string downloadUrl = String.Format("{0}/{1}", FtpUrl, FileNameToDownload);
FtpWebRequest req = (FtpWebRequest)FtpWebRequest.Create(downloadUrl);
req.Method = WebRequestMethods.Ftp.DownloadFile;
req.Credentials = new NetworkCredential(userName, password);
req.UseBinary = true;
req.Proxy = null;
try
{
FtpWebResponse response = (FtpWebResponse)req.GetResponse();
Stream stream = response.GetResponseStream();
byte[] buffer = new byte[2048];
FileStream fs = new FileStream(DownloadedFilePath, FileMode.Create);
int ReadCount = stream.Read(buffer, 0, buffer.Length);
while (ReadCount > 0)
{
fs.Write(buffer, 0, ReadCount);
ReadCount = stream.Read(buffer, 0, buffer.Length);
}
ResponseDescription = response.StatusDescription;
fs.Close();
stream.Close();
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
return ResponseDescription;
}
}
这段代码从ftp服务器下载一个文件,并将其写入服务器中的特定路径。
但保存文件的编码不是UTF-8。
我想将文件的编码类型更改为UTF-8。
我必须使用StreamReader吗?
如何修改该代码?您可以将其包装在StreaWriter中:
try
{
FtpWebResponse response = (FtpWebResponse)req.GetResponse();
Stream stream = response.GetResponseStream();
byte[] buffer = new byte[2048];
var sw = new StreamWriter( new FileStream(DownloadedFilePath, FileMode.Create),
Encoding.UTF8);
int ReadCount = stream.Read(buffer, 0, buffer.Length);
while (ReadCount > 0)
{
sw.Write(buffer, 0, ReadCount);
ReadCount = stream.Read(buffer, 0, buffer.Length);
}
ResponseDescription = response.StatusDescription;
sw.Close();
stream.Close();
}
我希望这会有帮助
您可以在这里查看:理论上,下面的内容应该可以工作,但这取决于responsestream是否可以与streamreader一起工作。 使用不同的编码编写很容易,您可以简单地使用streamwriter(基于textwriter)而不是filestream。但是,您不能直接写入字节,因为您必须写入格式正确的文本。为此,必须使用正确的原始编码将字节转换为文本(字符缓冲区)
char[] buffer = new char[2048]; //or 1024 if you want to keep the same block size
using (var reader = new StreamReader(stream, Encoding.Unicode)) // <= Or whatever encoding the orignal is
{
using (var tw = new StreamWriter(DownloadedFilePath, false, Encoding.UTF8)) //streamwriter instead of filestream
{
while (true)
{
int ReadCount = reader.Read(buffer, 0, buffer.Length);
if (ReadCount == 0) break;
tw.Write(buffer, 0, ReadCount);
}
ResponseDescription = response.StatusDescription;
stream.Close();
tw.Close();
}
}
char[]buffer=新字符[2048]//或1024,如果要保持相同的块大小
使用(var reader=newstreamreader(stream,Encoding.Unicode))//