Windows Forms

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;
    cx++;
}

newRow.Cells[cx].Value = o.ColumnValue;

dgvLayout.Rows[rowIndex].Cells[cx].Value = o.ColumnValue;

foreach (Column o in newRow.ExportLine.RecordLayout.Columns.Values)
{
    int rowIndex = dgvLayout.Rows.Count - 1;
    dgvLayout.Rows[rowIndex].Cells[cx].Value = o.ColumnValue;
    cx++;
}

foreach (Column o in newRow.ExportLine.RecordLayout.Columns.Values)
{
    DataGridViewCell c = newRow.Cells[cx];
    newRow.Cells[cx].Value = o.ColumnValue;
    cx++;
}

newRow.Cells[cx].Value = o.ColumnValue;

Specified argument was out of the range of valid values.
Parameter name: <big>rowIndex</big>

Brady Kelly wrote:

on the line I highlighted

Luc Pattyn wrote:

Haven't seen anything highlighted in your past five messages. I give up.
Read my tips, especially #2.

I wrote earlier:

cx starts at 1 because the is always a default column at the leftmost side of the grid. The line that is failing is:

newRow.Cells[cx].Value = o.ColumnValue;