c# Thread issue using Invoke from a background thread

Question

I\'ve got thread, which processes some analytic work.

   private static void ThreadProc(object obj)
    {
        var grid = (DataGridView)obj;
        forea         


        

Answer 1

You have a deadlock. Your t.Join is blocking the GUI thread until ThreadProc is done. ThreadProc is blocked waiting for t.Join to finish so it can do the Invokes.

Bad Code

    Thread t = new Thread(new ParameterizedThreadStart(ThreadProc)); 
    t.Start(dgvSource); 
    t.Join();  <--- DEADLOCK YOUR PROGRAM
    MessageBox.Show("Done", "Info"); 

Good Code

   backgroundWorker1.RunWorkerAsync

  private void backgroundWorker1_DoWork(object sender, 
        DoWorkEventArgs e)
    {    
        var grid = (DataGridView)obj;    
        foreach (DataGridViewRow row in grid.Rows)    
        {    
            if (Parser.GetPreparationByClientNameForSynonims(row.Cells["Prep"].Value.ToString()) != null)    
                UpdateGridSafe(grid,row.Index,1);    
            // don't need this Thread.Sleep(10);    
        }    
    }  

   private void backgroundWorker1_RunWorkerCompleted(
            object sender, RunWorkerCompletedEventArgs e)
        {
        MessageBox.Show("Done", "Info"); 
}

EDIT

Also use BeginInvoke instead of Invoke. That way your worker thread doesn't have to block every time you update the GUI.

Reference

Avoid Invoke(), prefer BeginInvoke()