虽然这里有很好的答案，但没有一个完全解决了我的问题(我希望从任何IQueryable DbContext中获得整个SQL语句，包括参数)。下面的代码就是这样做的。它是来自谷歌的代码片段的组合。我只用EF6+测试过。

说句题外话，这项任务花的时间比我想象的要长得多。恕我直言，实体框架中的抽象有点太多了。

首先是使用。您需要显式引用'System.Data.Entity.dll'。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;
using System.Data.Common;
using System.Data.Entity.Core.Objects;
using System.Data.Entity;
using System.Data;
using System.Data.Entity.Infrastructure;
using System.Reflection;

下面的类将一个IQueryable转换为一个DataTable。根据您的需要修改:

public class EntityFrameworkCommand
{
    DbContext Context;

    string SQL;

    ObjectParameter[] Parameters;

    public EntityFrameworkCommand Initialize<T>(DbContext context, IQueryable<T> query)
    {
        Context = context;
        var dbQuery = query as DbQuery<T>;
        // get the IInternalQuery internal variable from the DbQuery object
        var iqProp = dbQuery.GetType().GetProperty("InternalQuery", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
        var iq = iqProp.GetValue(dbQuery, null);
        // get the ObjectQuery internal variable from the IInternalQuery object
        var oqProp = iq.GetType().GetProperty("ObjectQuery", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
        var objectQuery = oqProp.GetValue(iq, null) as ObjectQuery<T>;
        SQL = objectQuery.ToTraceString();
        Parameters = objectQuery.Parameters.ToArray();
        return this;
    }

    public DataTable GetData()
    {
        DataTable dt = new DataTable();
        var connection = Context.Database.Connection;
        var state = connection.State;
        if (!(state == ConnectionState.Open))
            connection.Open();
        using (var cmd = connection.CreateCommand())
        {
            cmd.CommandText = SQL;
            foreach (var p in Parameters)
            {
                var param = cmd.CreateParameter();
                param.Name = "@" + p.Name;
                param.Value = p.Value;
                cmd.Parameters.Add(param);
            }
            using (var da = DbProviderFactories.GetFactory(connection).CreateDataAdapter())
            {
                da.SelectCommand = cmd;
                da.Fill(dt);
            }
        }
        if (!(state == ConnectionState.Open))
            connection.Close();
        return dt;
    }
}

要使用，只需如下所示调用它:

var context = new MyContext();
var data = ....//Query, return type can be anonymous
    .AsQueryable();
var dt = new EntityFrameworkCommand()
    .Initialize(context, data)
    .GetData();

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();

有两种方法:

To view the SQL that will be generated, simply call ToTraceString(). You can add it into your watch window and set a breakpoint to see what the query would be at any given point for any LINQ query. You can attach a tracer to your SQL server of choice, which will show you the final query in all its gory detail. In the case of MySQL, the easiest way to trace the queries is simply to tail the query log with tail -f. You can learn more about MySQL's logging facilities in the official documentation. For SQL Server, the easiest way is to use the included SQL Server profiler.

SQL Management Studio => Tools => SQL Server分析器

File =>新建跟踪…

使用Template =>空白

事件选择=> T-SQL

左侧检查:SP.StmtComplete

列筛选器可用于选择特定的ApplicationName或DatabaseName

启动该概要文件运行，然后触发查询。

点击这里获取来源信息

EF Core 5.0+

这个期待已久的功能在EF Core 5.0中可用!这是每周的状态更新:

var query = context.Set<Customer>().Where(c => c.City == city); Console.WriteLine(query.ToQueryString()) results in this output when using the SQL Server database provider: DECLARE p0 nvarchar(4000) = N'London'; SELECT [c].[CustomerID], [c].[Address], [c].[City], [c].[CompanyName], [c].[ContactName], [c].[ContactTitle], [c].[Country], [c].[Fax], [c].[Phone], [c].[PostalCode], [c].[Region] FROM [Customers] AS [c] WHERE [c].[City] = @__city_0 Notice that declarations for parameters of the correct type are also included in the output. This allows copy/pasting to SQL Server Management Studio, or similar tools, such that the query can be executed for debugging/analysis.

哦吼! !

(注意:你需要使用Microsoft.EntityFrameworkCore;)

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/