使用ASP.NET MVC下载后如何删除文件?

问题描述

我要在下载后立即删除文件，该怎么办?我尝试子类化FilePathResult并覆盖

I want to delete a file immediately after download, how do I do it? I've tried to subclass FilePathResult and override the WriteFile method where I delete file after

HttpResponseBase.TransmitFile

被调用，但这会挂起应用程序.

is called, but this hangs the application.

用户下载后可以安全删除文件吗?

Can I safely delete a file after user downloads it?

推荐答案

您可以使用OnActionExecuted方法为操作创建自定义操作过滤器，该方法将在操作完成后删除文件，例如

You could create a custom actionfilter for the action with an OnActionExecuted Method that would then remove the file after the action was completed, something like

public class DeleteFileAttribute : ActionFilterAttribute 
{ 
    public override void OnActionExecuted(ActionExecutedContext filterContext) 
    { 
        // Delete file 
    } 
} 

然后您的动作

[DeleteFileAttribute]
public FileContentResult GetFile(int id)
{
   ...
}

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