EF 6.0 이상에 해당 : 로깅 기능에 대해 더 알고 싶어하고 이미 제공된 답변 중 일부를 추가하려는 경우.
EF에서 데이터베이스로 전송 된 모든 명령을 기록 할 수 있습니다. EF 6.x에서 생성 된 쿼리를 보려면DBContext.Database.Log property
무엇이 기록 되는가
- SQL for all different kinds of commands. For example:
- Queries, including normal LINQ queries, eSQL queries, and raw queries from methods such as SqlQuery.
- Inserts, updates, and deletes generated as part of SaveChanges
- Relationship loading queries such as those generated by lazy loading
- Parameters
- Whether or not the command is being executed asynchronously
- A timestamp indicating when the command started executing
- Whether or not the command completed successfully, failed by throwing an exception, or, for async, was canceled
- Some indication of the result value
- The approximate amount of time it took to execute the command. Note that this is the time from sending the command to getting the result object back. It does not include time to read the results.
예:
using (var context = new BlogContext())
{
context.Database.Log = Console.Write;
var blog = context.Blogs.First(b => b.Title == "One Unicorn");
blog.Posts.First().Title = "Green Eggs and Ham";
blog.Posts.Add(new Post { Title = "I do not like them!" });
context.SaveChangesAsync().Wait();
}
산출:
SELECT TOP (1)
[Extent1].[Id] AS [Id],
[Extent1].[Title] AS [Title]
FROM [dbo].[Blogs] AS [Extent1]
WHERE (N'One Unicorn' = [Extent1].[Title]) AND ([Extent1].[Title] IS NOT NULL)
-- Executing at 10/8/2013 10:55:41 AM -07:00
-- Completed in 4 ms with result: SqlDataReader
SELECT
[Extent1].[Id] AS [Id],
[Extent1].[Title] AS [Title],
[Extent1].[BlogId] AS [BlogId]
FROM [dbo].[Posts] AS [Extent1]
WHERE [Extent1].[BlogId] = @EntityKeyValue1
-- EntityKeyValue1: '1' (Type = Int32)
-- Executing at 10/8/2013 10:55:41 AM -07:00
-- Completed in 2 ms with result: SqlDataReader
UPDATE [dbo].[Posts]
SET [Title] = @0
WHERE ([Id] = @1)
-- @0: 'Green Eggs and Ham' (Type = String, Size = -1)
-- @1: '1' (Type = Int32)
-- Executing asynchronously at 10/8/2013 10:55:41 AM -07:00
-- Completed in 12 ms with result: 1
INSERT [dbo].[Posts]([Title], [BlogId])
VALUES (@0, @1)
SELECT [Id]
FROM [dbo].[Posts]
WHERE @@ROWCOUNT > 0 AND [Id] = scope_identity()
-- @0: 'I do not like them!' (Type = String, Size = -1)
-- @1: '1' (Type = Int32)
-- Executing asynchronously at 10/8/2013 10:55:41 AM -07:00
-- Completed in 2 ms with result: SqlDataReader
외부 파일에 로그하려면
using (var context = new BlogContext())
{
using (var sqlLogFile = new StreamWriter("C:\\temp\\LogFile.txt"))
{
context.Database.Log = sqlLogFile.Write;
var blog = context.Blogs.First(b => b.Title == "One Unicorn");
blog.Posts.First().Title = "Green Eggs and Ham";
context.SaveChanges();
}
}
자세한 정보는 여기 : 데이터베이스 작업 로깅 및 인터셉트
