Windows Forms

note
        public class NamedRow: DataGridViewRow
        {
            public NamedRow() {}

            public NamedRow(string rowName):this()
            {
                this.RowName = rowName;
            }
            public string RowName { get; set; }
        }        
        
        private void GridBadForm_Load(object sender, EventArgs e)
        {
            dgvLayout.Columns.Add("Column 1", "Column 1");
            dgvLayout.Columns.Add("Column 2", "Column 2");

            NamedRow namedRowA = new NamedRow("Row A");
            namedRowA.CreateCells(dgvLayout);
            //namedRowA.Cells[0].Value = "A One";
            //namedRowA.Cells[1].Value = "A Two";

            NamedRow namedRowB = new NamedRow("Row B");
            namedRowB.CreateCells(dgvLayout);
            //namedRowB.Cells[0].Value = "B One";
            namedRowB.Cells[1].Value = "B Two";

            dgvLayout.Rows.Clear();
            dgvLayout.Rows.Add(namedRowA);
            dgvLayout.Rows.Add(namedRowB);

            NamedRow firstRow = (NamedRow)dgvLayout.Rows[0];
            NamedRow lastRow = (NamedRow)dgvLayout.Rows[dgvLayout.Rows.Count - 1];
            Debug.Print(firstRow.RowName);
            Debug.Print(lastRow.RowName);
        }

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?<o:p>

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