Question

将此SQL脚本转换为linq时遇到一些麻烦。 “fn_Split_t”函数只是拆分逗号分隔值。令我困惑的部分是那里的团体，因为它似乎抛弃了跟随它的一切。

    declare @count int
    select @count = COUNT(*) from  dbo.fn_Split_t(@portfolios)
    select 
         cc.CustodianCommentId
        ,cc.[Message]
        ,Symbol = NULL
        ,cc.DateStamp
        ,cc.AppUser
        ,PositionDate = @date
        ,cc.[Status]
        ,cc.Category
        ,cc.[Group]
    from dbo.CustodianComment cc
    join dbo.CustodianCommentPortfolio ccp on ccp.CustodianCommentId = cc.CustodianCommentId
    join dbo.CustodianPortfolio cp on ccp.CustodianPorfolioId = cp.CustodianPortfolioId
    join dbo.fn_Split_t(@portfolios) s on s.items = cp.PortfolioCode
    where  cp.PositionDate = @date 
    group by cc.CustodianCommentId,  cc.[Message], cc.DateStamp, cc.AppUser, cc.[Status], cc.Category, cc.[Group]
    having count(cc.CustodianCommentId) = @count
    order by cc.DateStamp desc

尝试排名第一的结果如下：

from c in Context.Comments
join pc in Context.PortfolioComments on c.CommentId equals pc.CommentId
join p in Context.Portfolios on pc.PortfolioId equals p.PortfolioId
where portfolios.Contains(p.PortfolioCode)
&& p.PositionDate == EntityFunctions.TruncateTime(date)
group c by c.CommentId into g
where g.Count() > portfolios.Count()
select new
{
   CommentId = c.CommentId,

   Message = c.Message,
   DateStamp = c.DateStamp,
   AppUser = c.AppUser,
   PositionDate = p.PositionDate,
   Status = c.Status,
   Category = c.Category,
   CategoryId = c.CategoryId,
   Group = c.Group
}

但是这不起作用，因为它说匿名对象中的c不在范围内。顺便说一下，投资组合与在SQL脚本中传递给@portfolios的csv字符串相同。我现在有点卡在这一点上，所以任何帮助都将不胜感激！谢谢！

Answer 1

 string[] portfoliosArray = portfolios.Split(',', StringSplitOptions.RemoveEmptyEntries);

 from ... in ...
    where portoliosArray.Contains(p.PortfolioCode)
    select ...

当投资组合代码列表包含空格或其他空格时，您可能需要修剪条目：

 string[] portfoliosArray = portfolios.Split(',', StringSplitOptions.RemoveEmptyEntries)
       .Select(s => s.Trim()).Where(s => !string.IsNullOrEmpty(s)).ToArray();

从原始SQL中读取，您可能需要：

    where portfoliosArray.All(p => c.PortFolios.PortfolioCode)

或者：

    where c.Portfolios.All(p => portfoliosArray.Contains(p.Portfolio.Code))

虽然我对你的要求并不完全确定。

将此SQL脚本转换为LINQ时遇到一些麻烦

1 个答案: