private void dgridParent_Click(object sender, EventArgs e)
{
// get the child rows of the currently selected row,
// based on the "FKProdCat" relationship. Turn that
// array of rows into a table and make that table
// the DataSource of the child DataGrid.
// The Parent DataGrid's DataTable
DataTable dtabParent =
dgridParent.DataSource as DataTable;
// The selected row in the Parent DataGrid
int ixSelectedRow = dgridParent.CurrentRowIndex;
// Retrieve the table of child rows.
dgridChild.DataSource =
UtilData.ConvertArrayToTable(
dtabParent.Rows[ixSelectedRow]
.GetChildRows("FKProdCat"));
}
