Cfrgtkky

I have a datagridview in which I process the data from a datatable. Then change the color on fields that are an issue. I do this through the ProgressChanged event. This is the code:

    private void bgwCompare_ProgressChanged(object sender, ProgressChangedEventArgs e)

    {

        ReportRow rr = (ReportRow)e.UserState;

        if (rr.nRow == 1 && rr.nColumn == 2)

            rr.nColumn = 2;  // If I leave this in it works, if I remove it the single cell is not colored

        if (rr.nColumn == -1)

            dgvResults.Rows[rr.nRow].DefaultCellStyle.BackColor = Color.Yellow;

        else

            dgvResults.Rows[rr.nRow].Cells[rr.nColumn].Style.BackColor = Color.Salmon;





    }

This gets... REALLY bizarre... I only appear to have a problem with a single cell out of over 1000 records.

IF I try to watch the cell get set, it works. (see the above code rr.nRow == 1 && rr.nColumn == 2)

If I comment that code out, the cell doesn't get painted. If I leave that code in, the cell gets painted. I know the value getting set to itself isn't doing anything, I just used that to set a break point. However, if I take the breakpoint off but leave the code it; it works. I'm baffled on what the heck is going on...

Anyone have any ideas?

I think that if you comment your line rr.nColumn = 2 out the code will be interpreted as like

if (rr.nRow == 1 && rr.nColumn == 2)

{

    if (rr.nColumn == -1)

        dgvResults.Rows[rr.nRow].DefaultCellStyle.BackColor = Color.Yellow;

    else

        dgvResults.Rows[rr.nRow].Cells[rr.nColumn].Style.BackColor = Color.Salmon;

}

and then the BackColor on [1,2] is not set as desired.

@DaBlue as you say in the comments no my code is not interpreted like this, please then try the following

if (false)

    MessageBox.Show("1");  // If I leave this in it works, if I remove it the single cell is not colored

if (true)

    MessageBox.Show("2");

else

    MessageBox.Show("3");

In this case "2" will be shown and then try out the following code

if (false)

    //MessageBox.Show("1");  // If I leave this in it works, if I remove it the single cell is not colored

if (true)

    MessageBox.Show("2");

else

    MessageBox.Show("3");

this time you won't see any pop up

IMHO you should always use curly braces even if it's an "one-liner"

Turns out it was working ok. I restarted my computer and re-ran the project with out the "debug code" and it worked perfectly. There must have been something in the OS that was causing issues.