调用PowerShell脚本.Net 3.5的多线程WinForm

Question

Will I run into any issues executing a single PowerShell script from a multithreaded WinForm app? My main concern is related to the WinForm threads locking the PowerShell script.

for (int i = 0; i <= toProcess; i++)
{
    bWorker.ReportProgress(0, i.ToString());
    PowerShellProcs workPs = new PowerShellProcs();

    workPs.CusId = CustomerDataTable.Rows[i]["CustomerID"].ToString();

    ThreadStart threadDelegate = new ThreadStart(workPs.DoPs);
    Thread newThread = new Thread(threadDelegate);
    newThread.Name = CustomerDataTable.Rows[i]["CustomerID"].ToString();
    newThread.Start();

    if (toProcess == i)
    {
        resetEvent.Set();
    }
    Thread.Sleep(1000);

    //threads.Add(newThread);
}

class PowerShellProcs
{
    public string CusId;
    public void DoPs()
    {
        String customerId = CusId;
        var scriptfile = @"c:\ProcessCustomer.ps1";         
        Process _Proc = new Process();
        _Proc.StartInfo = "Powershell.exe";
        _Proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
        _Proc.StartInfo.Arguments = "'" + customerId + "' ";
        _Proc.Start();
    }
}

Answer 1

What if toProcess contains the value 1,000,000. then you're spawning 1m threads. The _Proc.Start() is not blocking, so your threads will be finished in no-time, but you will probably don't want to spawn 1m processes.

If you want to process them parallel, add the process.WaitForExit(); (to make the executing process blocking) in the thread and put them on the ThreadPool . (The ThreadPool limits the concurrent threads (so also processes))

or

use the Parallel.Foreach() with the MaxDegreeOfParallelism property.