通过使用TransactionDto resultAlias = null;
var results = session.QueryOver<TransactionTable>(() => transactionAlias)
.Left.JoinAlias(pr => pr.UserFrom, () => usersFromAlias)
.Left.JoinAlias(pr => pr.UserTo, () => usersToAlias)
.Left.JoinAlias(pr => pr.GatewayTable, () => gatewayAlias)
.SelectList(list => list
.Select(pr => pr.TransactionId).WithAlias(() => resultAlias.TransactionId)
.Select(pr => pr.Amount).WithAlias(() => resultAlias.Amount)
.Select(pr => pr.Reason).WithAlias(() => resultAlias.Reason)
.Select(pr => pr.TransactionDatetime).WithAlias(() => resultAlias.TransactionDatetime)
.Select(pr => pr.GatewayTableId).WithAlias(() => resultAlias.GatewayTableId)
.Select(Projections.Conditional(
Restrictions.Eq(
Projections.Property(() => transactionAlias.UserFromId), 0),
Projections.Constant("Paypal"),
Projections.Property(() => usersFromAlias.FullName)
)).WithAlias(() => resultAlias.UserFromName)
.Select(Projections.Conditional(
Restrictions.Eq(
Projections.Property(() => transactionAlias.UserToId), 0),
Projections.Constant("Paypal"),
Projections.Property(() => usersToAlias.FullName)
)).WithAlias(() => resultAlias.UserToName))
.TransformUsing(Transformers.AliasToBean<TransactionDto>())
.List<TransactionDto>();
，我们可以获得它，但下拉列表中不会显示默认值。我们还有其他选项可以访问所选值吗？
我的更多代码如下：
[(ngModel)]="topic.id"答案 0 :(得分：0)
我不确定你要求的是什么，但我相信你希望能够获得所选项目的ID？我附上了一个快速实现的stackblitz，它将演示如何做到这一点。如果这不完全是你想要完成的事情，请告诉我。