Linq中int转String（解决LINQ to Entities 不识别方法"System.String ToString()",因此该方法无法转换为存储表达式.）..._weixin_34261415的博客

var query =
                 (from p in pageData
                  join z in zcData
                  on p.ZC equals z.ItemID into j_join
                  from x in j_join.DefaultIfEmpty()
                  group p by x.IName into g
                  select new
                  {
                      g.Key,
                      countNub = g.Count()
                  }).ToList();
var query =
                 (from p i