Question

I am using BackGround Worker for Loading data from DB(MS Access).
In my Form_Load i use:

 bgw.RunWorkerAsync();

In my DoWork event I laod the data from DB

private void bgw_DoWork(object sender, DoWorkEventArgs e)
    {

        int iResult = OpenDB();
        if (iResult != 0)
        {
            MessageBox.Show("Error in Opening DataBase", Constants.TITLE);
            return ;
        }
        DataSet ds = GetAllUserInfo();
        e.Result = ds;


    }

And in My RunWorkerCompleted i assign data to DataGridView.

    private void bgw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {

        dgUsers.Rows[0].Cells[0].Value = e.Result; 


    }

//Error Comes here after executing above code

[STAThread]
        static void Main()
        {
            Application.Run(new frmMain());
        }

Any help is appreciated.
Thanks.

Answer 1

Use SyncronizationContext mechanism for UI update . Example here http://www.codeproject.com/KB/threads/SynchronizationContext.aspx

1 .Have this as a global object :

System.Threading.SynchronizationContext synchronizationContext;

1. Instantiate the object “synchronizationContext” on Form_Load event :

   synchronizationContext = System.Threading.SynchronizationContext.Current;

2. Modify bgw_RonWorkerCompleted to :

   private void bgw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
   {

         synchronizationContext.Post(new SendOrPostCallback(
          delegate
          {
              dgUsers.DatSource =e.Result as DataSet;
          }), null);
   

   }