未调用流程退出事件处理程序方法 [英] Process Exited event handler method is not being called

问题描述

这是下面的代码... Process.Exited 事件处理程序方法没有被调用...我还通过断点和所有这些检查了这一点.

Here is the following code...the Process.Exited event handler method is not being called...I also checked that by breakpoints and all of that.

Process f;

private void button3_Click_1(object sender, EventArgs e)
{
    f = new Process();
    f.StartInfo.FileName = "tutorial.mp4";
    f.EnableRaisingEvents = true;
    f.Exited += new EventHandler(f_Exited);
    f.Start();
}

private void f_Exited(object sender, System.EventArgs e)
{
    //some stuff not important
}

推荐答案

我认为这是不可能的，因为不能保证在打开这样的文件时根本不会启动任何进程.

I think this isn't possible, because it isn't guaranteed that a process is started at all when you open a file like this.

假设没有为文件类型".mp4"设置任何标准程序.然后Windows将要求用户选择一个程序来打开文件.但是，如果用户取消此操作并且根本不选择任何程序，则不会开始任何处理.因此，我认为在这种情况下，因为您不能依赖此事件，所以根本不会触发Exited事件.

Suppose there isn't any standard program set for the file type ".mp4". Then Windows will ask the user to choose a program to open the file; but if the user cancels this and do not choose a program at all, then no process is started. Therfore I believe that in such a case the Exited event isn't fired at all because you can not rely on this.

我能想到的就是直接使用适当的命令行参数启动播放器，如下所示:

All i can think of is to start the player directly with an appropriate command line argument, like so:

Process f;
private void  button3_Click_1(object sender, EventArgs e)
{
    f = new Process();
    f.StartInfo.FileName = "wmplayer.exe"; // or something other
    f.StartInfo.Arguments = @"c:\tutorial.exe"; // as for the wmplayer, you have to specify the whole path.
    f.EnableRaisingEvents = true;
    f.Exited += new EventHandler(f_Exited);
    f.Start();

}
private void f_Exited(object sender, System.EventArgs e)
{
    //some stuff not important
}

这篇关于未调用流程退出事件处理程序方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！