C＃如何將流複製到Streamwriter中

我想將Stream（包含圖像）的內容複製到一個StreamWriter（我正在寫一個webrequest），到目前爲止我無法做到這一點。C＃如何將流複製到Streamwriter中

我試過imageStream.CopyTo(streamWriter);但是沒有工作，因爲它只能將它複製到另一個Stream而不是StreamWriter。

我希望有人能幫助我！

編輯：CODE ADDED

request.BeginGetRequestStream((requestResult => 
{ 
    Stream stream = request.EndGetRequestStream(requestResult); 
    using (StreamWriter streamWriter = new StreamWriter(stream)) 
    { 
     streamWriter.WriteLine(boundary); 
     streamWriter.WriteLine("Content-Disposition: form-data; name=\"json\""); 
     streamWriter.WriteLine("Content-Type: text/plain; charset=utf-8"); 
     streamWriter.WriteLine("Content-Transfer-Encoding: 8bit"); 

     streamWriter.WriteLine(json); 

     streamWriter.WriteLine(boundary); 
     streamWriter.WriteLine("Content-Disposition: form-data; name=\"image\"; filename=\"image.jpg\""); 
     streamWriter.WriteLine("Content-Type: application/octet-stream"); 
     streamWriter.WriteLine("Content-Transfer-Encoding: binary"); 
     streamWriter.WriteLine(""); 

     streamWriter.Flush(); 

     image.CopyTo(streamWriter.BaseStream); 
     // image.CopyTo(stream); // also not working 

     streamWriter.WriteLine(""); 
     streamWriter.WriteLine(boundary); 

     streamWriter.Close(); 
    } 

    ExecuteRequest(this, request); 

}), request);

來源

2012-10-19 Mats Hofman

你的例子說「requestStream」，你想確保你寫入響應流。 –

您可以使用* imageStream.CopyTo（requestStream.BaseStream）; * – decyclone

@decyclone似乎不起作用，雖然它運行良好，但不會複製數據。我將用添加的代碼編輯我的問題。 –

日Thnx到@decyclone我不得不使用streamWriter.BaseStream和重要的也是這個否則會以錯誤的順序寫入前使用Stream.Flush（）。

 request.BeginGetRequestStream((requestResult => 
     { 
      using (StreamWriter streamWriter = new StreamWriter(request.EndGetRequestStream(requestResult))) 
      { 
       streamWriter.WriteLine(boundary); 
       streamWriter.WriteLine("Content-Disposition: form-data; name=\"json\""); 
       streamWriter.WriteLine("Content-Type: text/plain; charset=utf-8"); 
       streamWriter.WriteLine("Content-Transfer-Encoding: 8bit"); 

       streamWriter.WriteLine(json); 

       streamWriter.WriteLine(boundary); 
       streamWriter.WriteLine("Content-Disposition: form-data; name=\"image\"; filename=\"image.jpg\""); 
       streamWriter.WriteLine("Content-Type: application/octet-stream"); 
       streamWriter.WriteLine("Content-Transfer-Encoding: binary"); 
       streamWriter.WriteLine(""); 

       streamWriter.Flush(); 

       streamWriter.CopyTo(stream.BaseStream); 

       streamWriter.WriteLine(""); 
       streamWriter.WriteLine(boundary); 

       streamWriter.Close(); 
      } 

      ExecuteRequest(this, request); 

     }), request);

來源

2012-10-19 19:15:38

C＃如何將流複製到Streamwriter中

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