您如何检查进程是否正在运行? [英] how do you check if a process is running?

问题描述

您好，我想编写一个简单的程序来检查某个进程，如果该进程正在运行，则会出现一个消息框.这是到目前为止我得到的，但是没有显示消息框.

Hi, I want to make a simple program that checks for a process and if it is running a messagebox will appear. Here is what I got so far but it doesn''t show the messagebox.

private void Form1_Load(object sender, EventArgs e)
       {
           foreach(Process pro in Process.GetProcesses("notepad")) {

               if( pro.ProcessName.Contains("notepad"))
               {
                   MessageBox.Show("hi");
               }

感谢您提前提供帮助.

Thanks for the help in advance.

推荐答案

看起来有些奇怪.带有字符串参数的GetProcesses在作为参数传递的计算机上搜索进程，请参阅: http://msdn .microsoft.com/en-us/library/x8b2hzk8.aspx [ ^ ].

您可以尝试 Process.GetProcessesByName方法(字符串) [

Looks a bit odd. The GetProcesses with a string parameter searches for processes on the machine passed as the parameter, see: http://msdn.microsoft.com/en-us/library/x8b2hzk8.aspx[^].

You could try Process.GetProcessesByName Method (String)[^] instead.

您可以使用属性System.Diagnostics.Process.HasExited.请注意此调用可能引发的异常，它可以帮助您解决其余情况，例如尚未启动过程等.
http://msdn.microsoft.com/en-us/library/system. diagnostics.process.hasexited.aspx [ ^ ].

在大多数情况下，您不应该检查进程状态，而应该简单地进行阻塞调用以等待进程启动:Process.WaitForExit.不用说，在这种情况下，您应该在单独的线程中使用进程.

请参阅: http://msdn.microsoft.com/en-us/library/system .diagnostics.process.aspx [ ^ ].

—SA

You can use the property System.Diagnostics.Process.HasExited. Pay attention for the exceptions this call can throw — it can help you to cover remaining situations, such as when the process has not been started, etc.:
http://msdn.microsoft.com/en-us/library/system.diagnostics.process.hasexited.aspx[^].

In most cases, you should not check the process status but should simply make a blocking call waiting for the process to start: Process.WaitForExit. Needless to say, in this case you should work with a process in a separate thread.

Please see: http://msdn.microsoft.com/en-us/library/system.diagnostics.process.aspx[^].

—SA

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