C＃ - 文件已损坏上传到服务器后， [英] C# - File is corrupt after uploaded to server

问题描述

我用来上传文件Excel和PDF下面的源代码，但该文件被移动到服务器后，该文件已损坏。我认为这个问题是在编码过程 Encoding.UTF8.GetBytes（sourceStream.ReadToEnd（））; ，但我不知道如何解决它结果<。 / p>

 公共静态无效sampleUpload（）
 {
 //获取用于与服务器通信的对象。 
的FtpWebRequest请求=（的FtpWebRequest）WebRequest.Create（ftp://100.165.80.15:21/output/Group经销商，主要经销商，区域，分公司和目标Report_20120927105003.pdf）; 
 request.Method = WebRequestMethods.Ftp.UploadFile; 
 
 //这个例子假设FTP站点使用匿名登录。 
 request.Credentials =新的NetworkCredential（TOC，fid123 !!）; 
 
 //文件的内容复制到请求流。 
的StreamReader的SourceStream =新的StreamReader（D：\\Group经销商，主要经销商，区域，分公司和目标Report_20120927105003.pdf）; 
字节[] = fileContents Encoding.UTF8.GetBytes（sourceStream.ReadToEnd（））; 
 sourceStream.Close（）; 
 request.ContentLength = fileContents.Length; 
 
流requestStream = request.GetRequestStream（）; 
 requestStream.Write（fileContents，0，fileContents.Length）; 
 requestStream.Close（）; 
 
 FtpWebResponse响应=（FtpWebResponse）request.GetResponse（）; 
 
 Console.WriteLine（上传文件的完整，状态{0}，response.StatusDescription）; 
 
 response.Close（）; 
} 
  

解决方案

不要读二进制文件为文本。使用 Stream.CopyTo 方法（或等效代码，如果你不能使用.NET 4.0）

 使用（的StreamReader的SourceStream = ...）{
使用（流requestStream = request.GetRequestStream（））
 {
 sourceStream.CopyTo（requestStream）; 
} 
} 
  

I used the following source code for upload file excel and pdf, but after the file was moved to server, the file is corrupt. I think the problem is on encoding process Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());, but I don't know how to resolve it.

public static void sampleUpload()
    {
        // Get the object used to communicate with the server.
        FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://100.165.80.15:21/output/Group Dealer, Main Dealer, Zone, Branch, and Destination Report_20120927105003.pdf");
        request.Method = WebRequestMethods.Ftp.UploadFile;

        // This example assumes the FTP site uses anonymous logon.
        request.Credentials = new NetworkCredential("toc", "fid123!!");

        // Copy the contents of the file to the request stream.
        StreamReader sourceStream = new StreamReader("D:\\Group Dealer, Main Dealer, Zone, Branch, and Destination Report_20120927105003.pdf");
        byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
        sourceStream.Close();
        request.ContentLength = fileContents.Length;

        Stream requestStream = request.GetRequestStream();
        requestStream.Write(fileContents, 0, fileContents.Length);
        requestStream.Close();

        FtpWebResponse response = (FtpWebResponse)request.GetResponse();

        Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription);

        response.Close();
    }

解决方案

Don't read binary files as text. Use Stream.CopyTo method (or equivalent code if you can't use .Net 4.0)

 using(StreamReader sourceStream = ...){
   using(Stream requestStream = request.GetRequestStream())
   {
     sourceStream.CopyTo(requestStream);
   }
 }

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