ADO.NET Entity Framework CodeFirst 如何输出日志(EF 5.0)
ADO.NET Entity Framework CodeFirst 如何输出日志(EF4.3) 用的EFProviderWrappers ,这个组件好久没有更新了,对于SQL执行日志的解决方案的需求是杠杠的,今天给大家介绍一个更好的组件Clutch.Diagnostics.EntityFramework,可以通过Nuget 获取:
这个框架定义了一个接口 IDbTracingListener:
namespace Clutch.Diagnostics.EntityFramework { public interface IDbTracingListener { void CommandExecuting(DbTracingContext context); void CommandFinished(DbTracingContext context); void ReaderFinished(DbTracingContext context); void CommandFailed(DbTracingContext context); void CommandExecuted(DbTracingContext context); } } 实现这个接口,添加一个类,里面实现自己的SQL 日志记录:
using System; using System.Data.Common; using System.Diagnostics; using Clutch.Diagnostics.EntityFramework; /// <summary> /// Implementation of IDbTracingListener Class is used for tracing all SQL Queries to the entity framework database /// </summary> public class DbTracingListener : IDbTracingListener { public void CommandExecuted(DbConnection connection, DbCommand command, object result, TimeSpan duration) { Debug.WriteLine(command.CommandText); Debug.WriteLine(string.Format("Executed in: {0}", duration)); } public void CommandExecuting(DbConnection connection, DbCommand command) { } public void CommandFailed(DbConnection connection, DbCommand command, Exception exception, TimeSpan duration) { } public void CommandFinished(DbConnection connection, DbCommand command, object result, TimeSpan duration) { } }
在方法内部通过 context.Command.CommandText 可以获得你的ef的sql命令的内容。
然后在程序的入口启用SQL日志输出实现:
// Enable Tracing queries DbTracing.Enable(); // Adding the listener (implementation of IDbTracingListener) DbTracing.AddListener(new DbTracingListener());