Re: Negative rowIndex problem for new DataGridViewRow

Brady

DId that work?  If not, could you zip up the part of your code with
the data grid view and email it to my email address

[email protected]

I'll debug the code to see what's going on.

kara

On Jan 27, 2008 1:00 PM, Brady Kelly <[email protected]> wrote:
> I create and add a new row to an unbound DataGridView.  Then, if I try and
> access an item in the Cells collection of the row, as in my commented out
> code, I get an index out of range exception, rowIndex.  I'm not specifying a
> row index, so I assume it is inferring it from the row object, whose
> rowIndex property is -1.  However, when I access the cell through a row in
> the grids Rows collection, I'm happy, as in my other code.  Can anyone
> explain this behaviour?
>
>
>
> The exception:
>
>
>
> Specified argument was out of the range of valid values.
>
> Parameter name: rowIndex
>
>
>
> The code:
>
>
>
>            ExportLineRow newRow = new ExportLineRow(); // Derived from
> DataGridViewRows.
>
>            newRow.ExportLine = newLIne;
>
>            newRow.CreateCells(dgvLayout);
>
>            dgvLayout.Rows.Add(newRow);
>
>
>
>            int cx = 1;
>
>            foreach (Column o in
> newRow.ExportLine.RecordLayout.Columns.Values)
>
>            {
>
>                int rowIndex = dgvLayout.Rows.Count - 1;
>
>                dgvLayout.Rows[rowIndex].Cells[cx].Value = o.ColumnValue;
>
>
>
>                // TODO Find out why this doesn't work.  Why is rowIndex -1?
>
>                //DataGridViewCell c = newRow.Cells[cx];
>
>                //newRow.Cells[cx].Value = o.ColumnValue;
> // Exception thrown here.
>
>                cx++;
>
>            }
>
>
>
> My column indexing is clearly not the problem, as in the following
> breakdown, the first snippet works with the same column index that's used in
> the second snippet, which failes:
>
>
>
> Works:
>
>
>
>            foreach (Column o in
> newRow.ExportLine.RecordLayout.Columns.Values)
>
>            {
>
>                int rowIndex = dgvLayout.Rows.Count - 1;
>
>                dgvLayout.Rows[rowIndex].Cells[cx].Value = o.ColumnValue;
>
>                cx++;
>
>            }
>
>
>
> Doesn't work:
>
>
>
>            foreach (Column o in
> newRow.ExportLine.RecordLayout.Columns.Values)
>
>            {
>
>                DataGridViewCell c = newRow.Cells[cx];
>
>                newRow.Cells[cx].Value = o.ColumnValue;
>
>                cx++;
>
>            }
>