var AbbA = (from t1 in mdc.table1
join t2 in mdc.table2 on t1.id equals t2.id
select new { t1, t2 }).AsQueryable();
if(a=1)
AbbA=AbbA.Where(q=>q.t1.cid==x);
else
AbbA=AbbA.Where(q=>q.t1.cid==y);
var Global=Abba.Select(q=> new{NewName1 = t1.field1, NewName2=t2.field2}).ToList();
我只想列出2个字段。但是返回了2个字段和where子句字段。
分析器视图
exec sp_executesql N'SELECT
[Extent1].[cid] AS [cid], >>> This is where clause filed
[Extent1].[field1] AS [NewName1],
[Extent2].[field2] AS [NewName2]
FROM [dbo].[table1] AS [Extent1]
INNER JOIN [dbo].[table2] AS [Extent2] ON [Extent1].[id] = [Extent2].[id]
WHERE [Extent1].[cid] = @p__linq__0',N'@p__linq__0 int',@p__linq__0=10000
我想我明白你的问题了…为什么生成的SQL包含where子句?
这一行将添加where子句,因为它仍然形成可查询的表达式树
AbbA=AbbA.Where(q=>q.t1.cid==x);
如果你想从生成的sql中删除where子句,然后在查询结束时添加一个ToList(),然后你将使用linq to objects操作结果,并且你将在从sql中检索到实际对象后操作内存中的对象。
var AbbA = (from t1 in mdc.table1
join t2 in mdc.table2 on t1.id equals t2.id
select new { t1, t2 }).ToList();