C#

OriginalGriff wrote:

Use Invoke to move teh listBox update back onto the UI thread and it should be fine.

private void TaskRunButton_Click(object sender, EventArgs e)
{
	// clear the list before writing
	listBox.Items.Clear();
	Task demoTask = new Task(DemoTask);
	demoTask.Start();
}

private void DemoTask()
{
	try
	{
		List<Task> tsk1 = new List<Task>();
		List<Task> tsk2 = new List<Task>();

		for (int i = 0; i < 10; i++)
		{
			tsk1.Add(new Task(TaskDemoWait100ms));
			tsk2.Add(new Task(TaskDemoWaitWait200ms));
		}

		for (int i = 0; i < 10; i++)
		{
			tsk1[i].Start();
			tsk2[i].Start();
			tsk2[i].Wait();
			listBox.BeginInvoke(new separatorDelegate(() =>
			{ listBox.Items.Add("------------"); }));
		}
	}
	catch (Exception ex)
	{
		string msg = ex.Message;
	}
}

delegate void taskdelegate(int threadId);
delegate void separatorDelegate();

private void TaskDemoWait100ms()
{
	Thread.Sleep(100);
	object[] param = new object[1];

	param[0] = (object)Thread.CurrentThread.ManagedThreadId;

	listBox.BeginInvoke(new taskdelegate((int threadId) =>
	{ listBox.Items.Add("Wait 100 ms, Thread Id = " + threadId); }), param);
}

private void TaskDemoWaitWait200ms()
{
	Thread.Sleep(200);
	object[] param = new object[1];

	param[0] = (object)Thread.CurrentThread.ManagedThreadId;

	listBox.BeginInvoke(new taskdelegate((int threadId) =>
	{ listBox.Items.Add("Wait 200 ms, Thread Id = " + threadId); }), param);
}

private async Task SynchronousWait200ms()
{
    await Task.Delay(200);
    listBox.Items.Add("Wait 200 ms, Thread Id = " + Thread.CurrentThread.ManagedThreadId);
}

private async void TaskRunButton_Click1(object sender, EventArgs e)
{
    listBox.Items.Clear();
    
    for (int i = 0; i < 10; i++)
    {
        await SynchronousWait200ms();
    }
    
    listBox.Items.Add("------------");
}

bonjot wrote:

Is possible to show the window of "Find and Replace" menu only without workbook appear?

bonjot wrote:

I just want to use excel search system in my program.