In Query 的 Linq 表达式链语法

发布于 2024-10-19 12:55:42 字数 199 浏览 2 评论 0原文

我有一个查询,似乎无法在表达式方法链语法中复制。我有两个表“User”和“UserPayment”。 User 和 UserPayment 具有一对多的关系,即一个 User 可以有多个 UserPayment。

只是想知道获取在特定日期付款的所有用户的语法是什么?或者甚至获取所有已付款的用户?

另请注意,我是用 VB 编写的。

谢谢

I have a query that I cannot seem to replicate in expression method chain syntax. I have two tables "User" and "UserPayment". User and UserPayment have a one to many relation i.e. One User can have many UserPayments.

Just wondering what the syntax is to get all users that have made a payment on a certain date? Or even get all users that have made a payment at all?

Also to note I am writing in VB.

Thanks

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巷雨优美回忆 2024-10-26 12:55:42

听起来您也许可以点击 UserPayments,使用 where 子句按日期进行过滤,并从那里获取不同的用户。

像这样的东西吗?

 Dim users = From up In db.UserPayments _
    Where up.PaymentDate >= someDate _
    Select up.User Distinct

VB 点表示法让我无法理解,但在 C# 中,我会这样做(抱歉,我无法准确地告诉您您正在寻找的内容):

var users = db.UserPayments.Where(x=>x.PayDate.Date == someDate)
                           .Select(x=>x.User)
                           .Distinct();

Sounds like you might be able to hit the UserPayments, use a where clause to filter by your date, and get the distinct Users from there.

Something like this?

 Dim users = From up In db.UserPayments _
    Where up.PaymentDate >= someDate _
    Select up.User Distinct

The VB dot-notation escapes me, but in C#, I'd do this (sorry I can't get you quite exactly what you're looking for):

var users = db.UserPayments.Where(x=>x.PayDate.Date == someDate)
                           .Select(x=>x.User)
                           .Distinct();
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