Question

因为目前我无法检索

的问题

        public IQueryable<Issue> commodityMatch_GetData(){

        string userName = HttpContext.Current.User.Identity.Name;
        Context db = new Context();
        IQueryable<Issue> query = db.Issues;
        //currently is filter by commodity and product line
        //looking on how to only filter by commodity

        var x = from r in db.Records
                where r.Username1 == userName
                select r.CommodityID;



        System.Diagnostics.Debug.WriteLine("Im fucking here");
        foreach(int s in x)
        {

            //s got 17 and 18
            System.Diagnostics.Debug.WriteLine(s);
            query = query.Where(p => p.CommodityID == s);
            //how to run mutiple time and return multiple times?
            //return mean end

        }


        return query;
        }

例如在var x中我有2个int，即17和18，但在上面的代码中，我无法检索商品= 17和18的问题。

        foreach(int s in x)
        {

            //s got 17 and 18
            System.Diagnostics.Debug.WriteLine(s);
            query = query.Where(p => p.CommodityID == s);
            return query;

        }

如果在这里返回查询，它只显示商品17的问题，然后它没有显示商品18的问题。

Answer 1

尝试将问题加入到单个LINQ查询的记录中：

var x = from r in db.Records
        join i in db.Issues
        on r.CommodityID == iCommodityID
        where r.Username1 == userName
        select i;

return x;

C＃如何在foreach中返回多个查询

1 个答案: