使用匿名类型-一个变量选择两个不同的查询 [英] Using anonymous types - one variable choose two different queries

问题描述

我想对两个查询之一进行变量处理，但是有两个不同的表，并且出现错误无法确定条件表达式的类型，因为在System.Linq.IQueryable<WGamesTicket>和System.Linq.IQueryable<AllGamesTicket>

I want to variable take one of two queries but there are two different tables and I have error "Type of conditional expression cannot be determined because there is no implicit conversion between System.Linq.IQueryable<WGamesTicket> and System.Linq.IQueryable<AllGamesTicket>

           var dsakj = (type == "mix") ?
                (from el in objDC.WGamesTickets
                 where el.ticket.time == DTtemp
                     //&& el.typeOfGame == "mix"
                 select el)
                 :
                 (from el in objDC.AllGamesTickets
                  where el.ticket.time == DTtemp
                  //&& el.typeOfGame == "eng"
                  select el);

推荐答案

您必须转换为新的自定义类.例如，您要从两个不同的表中提取数据，但也许您想从每个表中收集ID和名称.因此，将您的代码更改为:

You'll have to cast to a new custom class. For example, you're pulling from two different tables, but maybe you want to collect the id and name from each. So change your code to:

var dsakj = (type == "mix") ?
            (from el in objDC.WGamesTickets
             where el.ticket.time == DTtemp
                 //&& el.typeOfGame == "mix"
             select new myCustomObject()
             {
                 id = el.id,
                 name = el.name,
             })
             :
             (from el in objDC.AllGamesTickets
              where el.ticket.time == DTtemp
              //&& el.typeOfGame == "eng"
             select new myCustomObject()
             {
                 id = el.id,
                 name = el.name,
             });

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