[Solved] Cannot call start on a completed task [closed]

by


This code works for me and I can click the button multiple times without throwing the error in your title:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
   public partial class Form1 : Form
   {
      public Form1()
      {
         InitializeComponent();
      }

  void Button1Click(object sender, System.EventArgs e)
  {
     Task one = new Task(() => DoSomething());
     Task two = new Task(() => DoSomethingElse());
     Task three = new Task(() => DoEvenMore());

     one.Start();
     two.Start();
     three.Start();
  }

  void DoSomething()
  {
     if (InvokeRequired) Invoke((MethodInvoker)delegate { DoSomething(); });
     else label1.Text = "One started";

  }

  void DoSomethingElse()
  {
     if (InvokeRequired) Invoke((MethodInvoker)delegate { DoSomethingElse(); });
     else label1.Text += "Two started";

  }

  void DoEvenMore()
  {
     if (InvokeRequired) Invoke((MethodInvoker)delegate { DoEvenMore(); });
     else label1.Text += "Three started";

  }
   }

}

2

solved Cannot call start on a completed task [closed]