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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:

image

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());
posted @ 2013-08-08 22:08 张善友 阅读(...) 评论(...) 编辑 收藏