Backgroundworker error DateTime

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Hello, have some problem with DateTime in Backgroundworker.
Any solution for this one?
I really need DateTime.

This code don't work:

C#

private void bw_DoWork(object sender, DoWorkEventArgs e)
{
    BackgroundWorker worker = sender as BackgroundWorker;

        DateTime? start = DateTimePicker1.Value;
        DateTime? end = DateTimePicker2.Value;
        DateTime now = DateTime.Now;
        if (now >= end)
        {
            System.Threading.Thread.Sleep(500);
        }

}

This simple code works:

C#

private void bw_DoWork(object sender, DoWorkEventArgs e)
{

            System.Threading.Thread.Sleep(500);


}

Posted 17-Apr-13 5:34am

klottim

Updated 17-Apr-13 5:35am

v2

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Comments

Irina Pykhova 17-Apr-13 11:52am

look at answer about cross-threading, you should correct your code. And perhaps you should check whether end.HasValue is true and then compare with end.Value, not with end

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Pheonyx · Answer 1 · 2013-04-17T05:42:00

It would appear you are cross threading the application. You need to use delegates if you want other threads to be able to interact with user controls (even just reading them).
You could take advantage of this code snippet

Code Snippet

C#

private void button1_Click(object sender, EventArgs e)
    {
      string[] A = {textBox1.Text,textBox2.Text};
      backgroundWorker1.RunWorkerAsync(A);
    }
    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
      string[] S = (string[]) e.Argument;
    }

(source: http://social.msdn.microsoft.com/Forums/en-US/Vsexpressvcs/thread/47b693a3-1add-4fc7-8459-4232554c7131[^])