Question

我在aspx.cs文件中打开了一个带有此查询的asp.net项目：

from ev in table1
where ev.FromDate > DateTime.Today && ev.Active
orderby ev.FromDate
select ev;

这会自动变成一个数组。

我是asp.net的新手。它可能很容易，但我无法想象如何在此添加另一个表（table2）和条件！

您可能会要求提供表结构，例如：

table1

event_id  
FromDate  
toDate  
*item_id* [should be used as foreign key]  
Active

table2

item_id [should be used as foreign key]  
Desc   
Lang   
Active

谢谢

Answer 1

如果您正在寻找linq查询加入两个表。假设您拥有tabel2属性，因为您有table1。

from ev in table1
join item in table2 on item.item_id equals ev.item_id
where ev.FromDate > DateTime.Today && ev.Active
orderby ev.FromDate
select new {ev = ev, item = item};

Answer 2

只需加入他们并选择匿名类型：

from ev in table1
join sv in table2 on ev.item_id equals sv.item_id
where ev.FromDate > DateTime.Today && ev.Active
orderby ev.FromDate
select new 
          {
             ev.event_id, 
             ev.FromDate, 
             ev.toDate, 
             ev.item_id, 
             evActive = ev.Active, 
             sv.Desc, 
             sv.Lang, 
             svActive = sv.Active
          };

反向SQL语句asp.net

2 个答案: