为什么在设置过滤器后WinForms DataGridView中的RowIndex总是-1？

Question

我想要一个WinForms DataGridView（datasource = DataTable），用户可以在其中选择多个复选框单元格并按空格键启用/禁用它们。只要不应用过滤器，这就可以正常工作。一旦我这样做，行索引为-1，我无法通过按空格键来选择所选单元格。

这是我用来通过按空格键来选择多个单元格的代码。

private void grdChannels_KeyUp(object sender, KeyEventArgs e)
{
    string currentRowFilter = (grdChannels.DataSource as DataTable).DefaultView.RowFilter;
    if (e.KeyCode == Keys.Space)
    {
        e.Handled = true;
        DataGridViewSelectedCellCollection selectedCells = grdChannels.SelectedCells;
        for (int i = 0; i < selectedCells.Count; i++)
        {
            if (selectedCells[i].RowIndex == -1)
                continue;   // Why do we get here if a RowFilter was added?
            DataGridViewCell selectedCell = selectedCells[i];
            if (!(selectedCell is DataGridViewCheckBoxCell))
                continue;
            DataGridViewCheckBoxCell selectedCheckBoxCell = (DataGridViewCheckBoxCell)selectedCell;
            string cellVal = selectedCheckBoxCell.Value?.ToString();
            bool currentCellVal = bool.Parse(string.IsNullOrEmpty(cellVal) ? "False" : cellVal);
            selectedCheckBoxCell.Value = !currentCellVal;
        }
        grdChannels.BindingContext[grdChannels.DataSource].EndCurrentEdit();
    }
}

这是我在数据网格上设置/重置过滤器的代码（grdChannels）：

if (grdChannels.Columns[node.Key] != null)
    (grdChannels.DataSource as DataTable).DefaultView.RowFilter = string.Format("[{0}] = true", node.Key.Trim());
else
    (grdChannels.DataSource as DataTable).DefaultView.RowFilter = null;

我还必须添加此代码，以便在更改我的datagridview时更新它：

private void grdChannels_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
     // this is needed as cell values won't be commited as long as user doesn't change row or hits enter
     grdChannels.BindingContext[grdChannels.DataSource].EndCurrentEdit();
}

private void grdChannels_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
    grdChannels.CommitEdit(DataGridViewDataErrorContexts.Commit);
}

一旦用户点击过滤视图中的复选框，该行就会获得一个索引，一切都按预期工作。但如果用户首先使用空格键，则索引始终为-1。我该如何解决这个问题？