如何在值列表上过滤DataRows？

Question

我有一个具有TransactionID列的DataRow's集合-我正在尝试过滤出TransactionID列表中没有匹配值的DataRow's

List<int?> IDs = _sqlResultsRaw.AsEnumerable()
            .Select(x => x.Field<int?>("TransactionID")).ToList();
List<int?> pIDs = _sqlResultsRaw.AsEnumerable()
            .Select(x => x.Field<int?>("ParentTransactionID")).ToList();

List<int?> IDsToKeep = IDs.Except(pIDs).ToList();

我想创建一个DataRows集合，该集合具有与IDsToKeep匹配的值。如果TransactionID不在IDsToKeep中，我想将其删除

Answer 1

        EnumerableRowCollection<DataRow> val = _sqlResultsRaw.AsEnumerable()
            .Where(x => IDsToKeep.Contains((int)x["TransactionID"]));