Hi group,

First: .NET V2.0 (cannot upgrade)

I am trying to do my best with a DataGridView but I have several
issues. To illustrate what I have so far (more or less), some example
code first (questions are below the code):

There is a form which contains nothing but a DataGridView, the ctor
looks like:

      public Form1() {
           InitializeComponent();

           resetBindingsDelegate = new
ResetBindingsDelegate(resetBindings);

           for (int i = 0; i < 30; i++) {
               this.bindingSource1.Add(new Record());
           }

           t = new Thread(new ThreadStart(run));
           t.Start();
       }

The DataGridView will have 30 rows containing a Record. The Record
class is:

  public class Record {
       private long b;

       public Record() {
           b = 0;
       }

       public long B {
           get { return b; }
           set { b = value; }
       }
   }

Nothing special here... The thread started in the Form1 ctor looks
like:

       private void run() {
               do {
                   long newValue = System.DateTime.Now.Ticks;

                   IList<Record> records = this.bindingSource1.List
as IList<Record>;

                   foreach (Record r in records) {
                       r.B = newValue;
                   }

                   Invoke(resetBindingsDelegate, new Object[]
{false});

                   Thread.Sleep(50);
               } while (true);
       }

       private void resetBindings(bool metadatachanged)
       {
           this.bindingSource1.ResetBindings(metadatachanged);
       }

It does nothing but setting the current tickstime in the records's
property B.

Here are my questions:

1) Without the resetBindings() call, the new values do not show up in
the DataGridView. My feeling is that this should work (but it
doesn't). What am I doing wrong? What is the right way to update data?
To be honest: The values are there and if I select a cell, the current
value is shown. But it doesn't work automatically.
2) In case the resetBindings() call is correct, I have the problem
that each call automatically selects a cell, the old selection is
somtimes lost. The big problem is that the DataGridView scrolls
automatically to the selected cell. Thus, I cannot scroll down because
ResetBindings selects automatically the first cell (well, I can scroll
down but it immediately jumps to the first position - where the
selection is). Can I somehow make ResetBindings stop to manipulate the
cell selection?
3) I also found a method ResetItem(index). This solves all the issues
above but it slows down the application dramatically. For each cell
change, I have to call it and this call has to go via a delegate.
4) Is there any useful tutorial available explaining how DataGridView/
DataBinding work and how make a fast and useful table out of it? The
Microsoft documentation is not very helpfull...

Thanks for all your ideas and suggestions!

Regards,
Paul