Question

我有以下查询：

SELECT S.[FlowOrder], S.[DESCRIPTION], COUNT(I.ID)
FROM WorkFlowStatus AS S
INNER JOIN Item AS I
    ON S.ID = I.StatusID
WHERE I.Installation = '1'
GROUP BY S.[Description], S.[FlowOrder]
ORDER BY S.[FlowOrder]

这给了我一个项目的计数，按工作流的外键分组，从我的FK表输出描述性名称。

我已经在后台使用LINQ查询（使用LINQ-to-SQL）：

var items = from s in _entities.WorkflowStatus
    join i in _entities.Items on s.ID equals i.StatusId
    into Statuses
    orderby s.FlowOrder
    select new {s.Description, ItemCount = Statuses.Count() };

如何将SQL中的where子句放入此LINQ查询中？

Answer 1

这个怎么样？

var items = from s in _entities.WorkflowStatus
    join i in _entities.Items.Where(item=>item. Installation == "1") on s.ID equals i.StatusId
    into Statuses
    orderby s.FlowOrder
    select new {s.Description, ItemCount = Statuses.Count() };

将SQL转换为LINQ查询 - group / join / filter

1 个答案: