Configure datagrivviewcomboboxcell items during the datasource binding process.

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C#

.NET

DataGridView

Hello Everyone,

I am looking for a way to feed the combobox cell of a datagridview during the initialization of the datasource binding operation.

I was hoping to apply the cmb.Items.Add(...) operation there but RowsAdded does not come for each new row, it is a bit random.

If I apply that operation after the binding is completed, it takes a very long time to update the combobox item for in my case 1024 rows.

Does somebody know a way to feed the combobox on demand if I do not use the virtualmode system but the datasource binding way ?

What I have tried:

I tried:

RowsAdded += AdvancedDataGridView_RowsAdded;

private void AdvancedDataGridView_RowsAdded(object sender, DataGridViewRowsAddedEventArgs e)
        {
            if (_onRowAdded != null)
            {

                foreach (System.Windows.Forms.DataGridViewRow row in base.Rows)
                {
                    T values = (T)row.DataBoundItem;
                    values = Copy(values);
                    _onRowAdded(row, values);
                }
            }
        }

        private void OnRowAdded(DataGridViewRow row, Channel values)
        {
            mpUserControls.DataGridViewColumn col = _grid.Columns["InputMode"];

            System.Windows.Forms.DataGridViewCell cell = row.Cells[col.Index];

            if (cell is DataGridViewComboBoxCell)
            {
                DataGridViewComboBoxCell combo = (DataGridViewComboBoxCell)cell;
                combo.Value = string.Empty;
                combo.Items.Clear();
                if (combo.Items.Count <= 0)
                {
combo.Items.Add(Channel.netInputMode.INPUTMODE_VOLTAGE.ToString());
                    if (row.Index % 2 != 0)
combo.Items.Add(Channel.netInputMode.INPUTMODE_ICP.ToString());
                }

                combo.Value = values.InputMode;
            }
        }

This works fine for rows index 0 and 1 but not until the 1024 row count.

Do you know if there is a possible way to complete that expectation ?

Thank you so much in advance.
Best regards.
Miqi