如何在绑定到datatable的datagridview中保存更改的数据

private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
    if (e.RowIndex >= 0 && e.ColumnIndex >= 0) // 确保修改的是有效的单元格
    {
        DataGridView dataGridView = (DataGridView)sender;
        DataTable dataTable = (DataTable)dataGridView.DataSource;

        DataRow modifiedRow = dataTable.Rows[e.RowIndex];
        DataColumn modifiedColumn = dataTable.Columns[e.ColumnIndex];

        object modifiedValue = dataGridView.Rows[e.RowIndex].Cells[e.ColumnIndex].Value;

        modifiedRow[modifiedColumn] = modifiedValue;
    }
}

private void SaveChanges()
{
    DataTable dataTable = (DataTable)dataGridView1.DataSource;
    dataTable.AcceptChanges();
}