> I've populated all the cells in a combo box column with values from 1 -
> 50 using the following code:
>
>  foreach (DataGridViewRow row in uxTabSummary.Rows)
>  {
>       DataGridViewComboBoxCell cell = (DataGridViewComboBoxCell)
> row.Cells["numRows"];
>        for (int i = 1; i < 51; i++)
>        {
>             cell.Items.Add(i);
>         }
>   }
>
> However, after the user changes a value in the drop down combo box, and
> moves the focus to another cell, a "System.ArgumentException:
> DataGridViewComboBoxCell value is not valid".
>
> Googling shows an extensive number of people suffering the same, but
> I'm none the wiser.
>
> Is there a simple solution to this?
>
> Greg.

> Greg wrote:
> > I've populated all the cells in a combo box column with values from 1 -
> > 50 using the following code:
> >
> >  foreach (DataGridViewRow row in uxTabSummary.Rows)
> >  {
> >       DataGridViewComboBoxCell cell = (DataGridViewComboBoxCell)
> > row.Cells["numRows"];
> >        for (int i = 1; i < 51; i++)
> >        {
> >             cell.Items.Add(i);
> >         }
> >   }
> >
> > However, after the user changes a value in the drop down combo box, and
> > moves the focus to another cell, a "System.ArgumentException:
> > DataGridViewComboBoxCell value is not valid".
> >
> > Googling shows an extensive number of people suffering the same, but
> > I'm none the wiser.
> >
> > Is there a simple solution to this?
> >
> > Greg.
>
> Perhaps you can try adding a DataTable to hold all those values for the
> ComboBox, then setting the ComboBoxColumn.DataSource to the DataTable.
> The ComboBoxColumn.ValueMember's data must be valid for the underlying
> column in the DataGridView.
>
> B.