title: How do I directly trigger a download window for a downloaded S3 file in .NET?
body: <p>I still don't know very well about aws s3 storage, but I can already do the basic operations of listing / uploading / downloading objects using nuget awssdks.</p>
  <p>However, when downloading an object, I have to create a file on my web server and then make the file available to my user.</p>
  <p>It seems to me that I don't know how to perform the direct download to the client.</p>
  <p>Is this possible ? If yes, which way to do this?</p>
  <p>How to simply transform my current source code for direct download in S3 ?</p>
  <p>Thank you very much for guidance.</p>
  <pre><code>private void DOWFile(string pFileDir, string pFileName, string pDescription)
  {
      //Armazena o path do arquivo
      string lFilePath = pFileDir + pFileName;
      //Verifica se o arquivo existe
      if (File.Exists(lFilePath))
      {
          //Limpa o objeto de resposta
          Response.Clear();
          //Limpa o nome do arquivo
          if (Request.UserAgent.Contains(&quot;Firefox&quot;)) pDescription = TFileInfo.CONVERTToFileName(pDescription);   
          //Adiciona o cabeçalho do donwload
          Response.AddHeader(&quot;Content-Disposition&quot;, &quot;attachment; filename=\&quot;&quot; + HttpUtility.UrlPathEncode(pDescription) + &quot;\&quot;&quot;);
          //Seta o tipo do arquivo
          Response.ContentType = &quot;application/octet-stream&quot;;
          //Passa a referência do arquivo
          Response.WriteFile(lFilePath);
          //Executa o download do arquivo
          Response.Flush();
          //Finaliza o processamento
          HttpContext.Current.Response.SuppressContent = true;
          HttpContext.Current.ApplicationInstance.CompleteRequest();
      }
      else
      {
          //Mostra a mensagem de Erro
          SETErrorInfo(new TErrorInfo(-1, &quot;DOWFile&quot;, TErrorInfo.ErrFileNotFound, &quot;FileNotFound - &quot; + lFilePath, false, true, false, true, false, TErrorInfo.TErrType.etLogic));
      }
  }
  
  public bool FileDownS3(string pLocalPath, string pFileNameS3)
      {
          IAmazonS3 lClient_Aws = new AmazonS3Client(Amazon.RegionEndpoint.USEast1);
          TransferUtility lUtility = new TransferUtility(lClient_Aws);
  
          string filename = pLocalPath + pFileNameS3;
          FileStream fs = File.Create(filename);
          fs.Close();
  
  
          lUtility.Download(filename, gBucketName, pFileNameS3);
  
          return true;
      }
  </code></pre>