在DataSet中建立两个 DataTable 对象之间的父/子关系

1。建立两个 DataTable 对象之间的父/子关系
>>>>DataColumn parentCol;
DataColumn childCol;
parentCol = DataSet1.Tables["Customers"].Columns["CustID"];
childCol = DataSet1.Tables["Orders"].Columns["CustID"];
DataRelation relCustOrder;
relCustOrder = new DataRelation("CustomersOrders", parentCol, childCol);
DataSet1.Relations.Add(relCustOrder);
2。获得相关数据
private void GetChildRowsFromDataRelation(DataTable myTable ) {
DataRow[] arrRows;
foreach(DataRelation myRelation in myTable.ChildRelations){
foreach(DataRow myRow in myTable.Rows){
arrRows = myRow.GetChildRows(myRelation, DataRowVersion.Proposed);
// Print values of rows.
for(int i = 0; i < arrRows.Length; i++){
foreach(DataColumn myColumn in myTable.Columns){
Console.WriteLine(arrRows[i][myColumn]);
}
}
}
}
}