Simply grasp the method of starting external program process by C in Windows

Many users need to use C # to start an external program (process) in the process of program development, and hope to close it after using the external program. Here, we give a brief introduction to the method of starting and shutting down external processes in C #.

There are two ways for C # to start external programs (processes): one is to directly use Process class provided by C #, and use the function operation of the class to directly start external programs; Another method is to use the traditional Win32 API function CreateProcess to start the external process.

Using the Process class provided by C # to start an external program method is relatively simple, and the example code is as follows:

using System.Diagnostics; //  Includes Process Definition of class 

int myprocessID;  //  Process ID

//  Method 1 Direct use .Net Offered Process Class to start an external program 
private void openButton_Click(object sender, EventArgs e)
{
 　　 Process myProcess = Process.Start('\\NandFlash\\SerialTST.exe', ''); //  Start an external process 
 　　 myprocessID = myProcess.Id; //  Get the external process ID
}

 Use the traditional Win32 API The method of the function is relatively complex, and the code is as follows: 

using System.Runtime.InteropServices;  //  Use external Win32 API

#region Win32 API CreateProcess Function declaration makes a function declaration. 
[DllImport('coredll.Dll', EntryPoint = 'CreateProcess', SetLastError = true)]
extern static int CreateProcess(string strImageName, string strCmdLine,
   　　  　　  　           　　  　　      IntPtr pProcessAttributes, IntPtr pThreadAttributes,
              　　    　　  　　     int bInheritsHandle, int dwCreationFlags,
    　　  　　  　    　　  　　  　   　　  　　    IntPtr pEnvironment, IntPtr pCurrentDir,
    　　  　　  　    　　  　　  　   　　  　　    IntPtr bArray, ProcessInfo oProc);

public class ProcessInfo
{
 　　 public int hProcess;
 　　 public int hThread;
 　　 public int ProcessID;
 　　 public int ThreadID;
}
#endregion

Method 2: Use Win32 API to start an external program

private void openButton_Click(object sender, EventArgs e)
{
 　　 ProcessInfo pi = new ProcessInfo();
 　　 CreateProcess('\\NandFlash\\SerialTST.exe', '', IntPtr.Zero, IntPtr.Zero, 
  　　  　　  　　  　　    0, 0, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, pi);
 　　 myprocessID = pi.ProcessID;      //  Object for the program ID
}

 The way to close an external process is directly through the obtained external process's ID To shut it down. Only the use of the .Net Adj. Process Method of class: 

//  Shut down an external process 
private void closeButton_Click(object sender, EventArgs e)
{
 　　 Process myProcessA = Process.GetProcessById(myprocessID);   //  Pass ID Associated process 
 　　 myProcessA.Kill();          // kill Process 
}