How Can I Check if a C# Process Instance Is Still Running?

How to determine the status of a running process in C#

In .NET, the System.Diagnostics.Process class provides access to running process information. A critical task that may arise is determining whether a specific process is still active.

Question: How to determine if a Process instance is currently running?

Answer:

Method 1: Use process name

Process[] pname = Process.GetProcessesByName("notepad");
if (pname.Length == 0)
  MessageBox.Show("进程未运行");
else
  MessageBox.Show("进程正在运行");

In this code, we retrieve a collection of all processes that match a specified name (e.g., "notepad"). If the length of this collection is zero, it means that no process by that name is running.

Method 2: Traverse all processes

Process[] processlist = Process.GetProcesses();
foreach(Process theprocess in processlist){
   Console.WriteLine($"进程名称：{theprocess.ProcessName}，进程ID：{theprocess.Id}");
}

This method involves looping through all running processes and checking the name and identification number of each process. This is a more general approach that finds all processes, not just those with a specified name.

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