如果您还想拥有参数值(不仅是@p_linq_0，而且还有它们的值)，您可以使用IDbCommandInterceptor并向ReaderExecuted方法添加一些日志记录。

适用于EF 6.0及以上: 对于那些想要了解更多关于日志功能并添加到已经给出的一些答案的人。

现在可以记录从EF发送到数据库的任何命令。查看从EF 6生成的查询。x，使用DBContext.Database.Log属性

记录什么

- 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.

例子:

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(); 
}

输出:

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

记录到外部文件:

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();
   }
}

更多信息在这里:记录和拦截数据库操作

在我的EF 6+的情况下，而不是在立即窗口中使用这个来查找查询字符串:

var sql = ((System.Data.Entity.Core.Objects.ObjectQuery)query).ToTraceString();

我最终不得不使用这个来获得生成的SQL命令:

var sql = ((System.Data.Entity.Infrastructure.DbQuery<<>f__AnonymousType3<string,string,string,short,string>>)query).ToString();

当然，您的匿名类型签名可能有所不同。

HTH.

在EF 4.1中可以执行以下操作:

var result = from x in appEntities
             where x.id = 32
             select x;

System.Diagnostics.Trace.WriteLine(result .ToString());

这将为您提供生成的SQL。

如果您正在使用DbContext，您可以执行以下操作来获取SQL:

var result = from i in myContext.appEntities
             select new Model
             {
                 field = i.stuff,
             };
var sql = result.ToString();

好吧，目前我正在使用Express分析器，缺点是它只适用于MS SQL Server。你可以在这里找到这个工具:https://expressprofiler.codeplex.com/