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.

Great, thanks!

Brian Tkatch wrote:
> 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.