How to Execute multiple commands in Process

Question

I have a list of a thousand items, Each of these items must be checked by the CMD.exe, With the help of the following code, I can check an item by CMD

  var p = new Process
 {
   StartInfo =
   {
     UseShellExecute = false,
     RedirectStandardOutput = true,
     CreateNoWindow = true,
     FileName = "cmd",
     Arguments = $"list {Id}"
   }};
   p.Start();
   var _Data = await p.StandardOutput.ReadToEndAsync();

But the question is, I want all of these items to be checked quickly by CMD, I'm currently doing this as follows

foreeach(var item in list)
{
     var p = new Process
     {
       StartInfo =
       {
         UseShellExecute = false,
         RedirectStandardOutput = true,
         CreateNoWindow = true,
         FileName = "cmd",
         Arguments = $"list {item}"
       }};
       p.Start();
       var _Data = await p.StandardOutput.ReadToEndAsync();
}

But it takes a long time to do this

I beg to suggest you are probably going the wrong way about this altogether. This seems to be a classic XY Problem. What are you actually trying to achieve? — Charlieface
– Charlieface, Commented Jun 13, 2021 at 11:50

Rostam Bamasi · Accepted Answer · 2021-06-13 11:45:54Z

2

You can redirect standard input and use a StreamWriter to write to it:

Process p = new Process();
    ProcessStartInfo info = new ProcessStartInfo();
    info.FileName = "cmd.exe";
    info.RedirectStandardInput = true;
    info.UseShellExecute = false;

    p.StartInfo = info;
    p.Start();

    using (StreamWriter sw = p.StandardInput)
    {
        if (sw.BaseStream.CanWrite)
        {
            sw.WriteLine("mysql -u root -p");
            sw.WriteLine("mypassword");
            sw.WriteLine("use mydb;");
        }
    }

answered Jun 13, 2021 at 11:45

Rostam Bamasi

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