c# - 从服务器下载文件，然后在服务器上删除

Question

好的，我正在从服务器下载文件，我计划在客户端下载文件后删除我在服务器上下载的文件..

我的下载代码工作正常，但我不知道什么时候输入删除文件的命令。

string filepath = restoredFilename.ToString();

            // Create New instance of FileInfo class to get the properties of the file being downloaded
            FileInfo myfile = new FileInfo(filepath);

            // Checking if file exists
            if (myfile.Exists)
            {

                // Clear the content of the response
                Response.ClearContent();

                // Add the file name and attachment, which will force the open/cancel/save dialog box to show, to the header
                Response.AddHeader("Content-Disposition", "attachment; filename=" + myfile.Name);

                //Response.AddHeader("Content-Disposition", "inline; filename=" + myfile.Name);
                // Add the file size into the response header
                Response.AddHeader("Content-Length", myfile.Length.ToString());

                // Set the ContentType
                Response.ContentType = ReturnExtension(myfile.Extension.ToLower());

                //// Write the file into the response (TransmitFile is for ASP.NET 2.0. In ASP.NET 1.1 you have to use WriteFile instead)
                Response.TransmitFile(myfile.FullName);

                // End the response
                Response.End();

            }

现在我知道 response.End() 会停止一切并返回值，那么还有另一种方法吗..

我需要调用一个函数

DeleteRestoredFileForGUI(restoredFilename);

删除文件但不知道放在哪里..我尝试在 Response.End() 之前和之后放置但它不起作用..

感谢任何帮助...谢谢

Answer 1

添加

Response.Flush();
DeleteRestoredFileForGUI(restoredFilename);

在调用 TransmitFile() 之后并放弃对 Response.End() 的调用(您不需要它)。

如果这不起作用，则放弃 TransmitFile() 并使用:

Stream s = myFile.OpenRead();
int bytesRead = 0;
byte[] buffer = new byte[32 * 1024] //32k buffer
while((bytesRead = s.Read(buffer, 0, buffer.Length)) > 0 &&
      Response.IsClientConnected)
{
   Response.OutputStream.Write(buffer, 0, bytesRead);
   Response.Flush();
}