选择一个包含where的新对象

Question

当我们选择新对象时，如何将Where与 Linq 一起使用？

这就是我所拥有的：

From x In mydb.vw_TransactionsWithNames 
Select New datetransaction() With {.start = x.StartDate, .ends = x.EndDate} 
Where x.fkCommunity = c.PkCommunity And x.isCancelled = 0

但我在Select New datetransaction() With {.start = x.StartDate, .ends = x.EndDate} - ＆gt;之后出错了姓名＆＃39; x＆＃39;未在当前范围内声明或未声明

谢谢。

Answer 1

通过声明预期的类型使表达式具体化。 Where子句在Select语句之前。 query是Anonymous Type，是结果的集合。

Dim query = From x As {datatype here} In mydb.vw_TransactionsWithNames 
            Where x.fkCommunity = c.PkCommunity And x.isCancelled = 0
            Select New With {.start = x.StartDate, .ends = x.EndDate}