让Ef.DbContext输出SQL

1、在YourDbContext构造函数中配置Database.Log。

1 public partial class XxxEntities: DbContext
2     {
3         public XxxEntities()
4             : base("name=XxxEntities")
5         {
6             System.Diagnostics.Debug.WriteLine("--实例化DbContext--");
7             Database.Log = x => { System.Diagnostics.Debug.WriteLine(x); };
8         }
9     }

2、在Debug(F5)环境下测试，才能在output窗口中输出SQL信息。

 1 --实例化DbContext--
 2 已于 2015/6/2 12:51:38 +08:00
 3  打开了连接
 4 SELECT 
 5     [Extent1].[CoSetID] AS [CoSetID], 
 6     [Extent1].[BeginTime] AS [BeginTime], 
 7     [Extent1].[EndTime] AS [EndTime], 
 8     [Extent1].[CreateTime] AS [CreateTime], 
 9     [Extent1].[CreatorID] AS [CreatorID], 
10     [Extent1].[Creator] AS [Creator], 
11     [Extent1].[LastUpdateTime] AS [LastUpdateTime], 
12     [Extent1].[LastEditorID] AS [LastEditorID], 
13     [Extent1].[LastEditor] AS [LastEditor], 
14     [Extent1].[IsEnabled] AS [IsEnabled], 
15     [Extent1].[IsDeleted] AS [IsDeleted], 
16     [Extent1].[Timestamp] AS [Timestamp]
17     FROM [dbo].[CourseSet] AS [Extent1]
18     WHERE 0 = [Extent1].[IsDeleted]
19     ORDER BY [Extent1].[BeginTime] ASC
20 
21 
22 -- 正在 2015/6/2 12:51:39 +08:00
23  执行
24 -- 已在 25 毫秒内完成，结果为: SqlDataReader
25 
26 
27 
28 已于 2015/6/2 12:51:39 +08:00
29  关闭了连接

默认情况下，VS会输出许多其它类型的消息，但是可以在output窗口中右击选择需要输出的消息类型。