c# – Linq问题选择一列的总和减去另一个表的另一列

这是我的sql代码

SELECT   M.PartNo AS ModulePartNo,(SELECT SUM(Delivered - Allocated) 
FROM V_InStock Stk
WHERE Stk.PartNo = M.PartNo) AS Available
FROM V_Products M
WHERE M.PartNo='100-25897'

我真的有问题让这个在Linq工作,无法解决总和部分 – 任何帮助将非常感激

解决方法

这应该工作.

var query = from stk in V_InStock
            group stk by stk.PartNo into stkg
            where stkg.Key == '100-25897'
            select new
            {
              ModulePartNo = stkg.Key,Available = stkg.Sum(s => s.Delivered) - stkg.Sum(s => s.Allocated)
            }