DbCommandInterceptor抓取EF执行时的SQL语句

Posted 2021-12-02 souphm

 

EF6.1也出来不少日子了,6.1相比6.0有个很大的特点就是新增了System.Data.Entity.Infrastructure.Interception 命名空间,此命名空间下的对象可以允许我们更加方便的了解到EF运行时的一些信息,当然我们最想看的还是EF生成的Sql语句,话不多讲,开始干吧;

public class EFIntercepterLogging : DbCommandInterceptor
    {

        ILog log = LogManager.GetLogger("InfoAppender");
        private readonly Stopwatch _stopwatch = new Stopwatch();
        public override void ScalarExecuting(System.Data.Common.DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
        {
            SaveCmdSql(command);
            base.ScalarExecuting(command, interceptionContext);
            _stopwatch.Restart();
        }
        public override void ScalarExecuted(System.Data.Common.DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
        {
            _stopwatch.Stop();
            SaveCmdSql(command);
            if (interceptionContext.Exception != null)
            {
                Trace.TraceError("Exception:{1} rn --> Error executing command: {0}", command.CommandText, interceptionContext.Exception.ToString());
            }
            else
            {
                Trace.TraceInformation("rn执行时间:{0} 毫秒rn-->ScalarExecuted.Command:{1}rn", _stopwatch.ElapsedMilliseconds, command.CommandText);
            }
            base.ScalarExecuted(command, interceptionContext);
        }
        public override void NonQueryExecuting(System.Data.Common.DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
        {
            SaveCmdSql(command);
            base.NonQueryExecuting(command, interceptionContext);
            _stopwatch.Restart();
        }
        public override void NonQueryExecuted(System.Data.Common.DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
        {
            _stopwatch.Stop();
            SaveCmdSql(command);
            if (interceptionContext.Exception != null)
            {
                Trace.TraceError("Exception:{1} rn --> Error executing command:rn {0}", command.CommandText, interceptionContext.Exception.ToString());
            }
            else
            {
                Trace.TraceInformation("rn执行时间:{0} 毫秒rn-->NonQueryExecuted.Command:rn{1}", _stopwatch.ElapsedMilliseconds, command.CommandText);
            }
            base.NonQueryExecuted(command, interceptionContext);
        }
        /// <summary>
        /// 读取操作
        /// </summary>
        /// <param name="command"></param>
        /// <param name="interceptionContext"></param>
        public override void ReaderExecuting(System.Data.Common.DbCommand command, DbCommandInterceptionContext<System.Data.Common.DbDataReader> interceptionContext)
        {
            SaveCmdSql(command);
            base.ReaderExecuting(command, interceptionContext);
            _stopwatch.Restart();
        }
        public override void ReaderExecuted(System.Data.Common.DbCommand command, DbCommandInterceptionContext<System.Data.Common.DbDataReader> interceptionContext)
        {
            _stopwatch.Stop();
            SaveCmdSql(command);
            if (interceptionContext.Exception != null)
            {
                Trace.TraceError("Exception:{1} rn --> Error executing command:rn {0}", command.CommandText, interceptionContext.Exception.ToString());
            }
            else
            {
                Trace.TraceInformation("rn执行时间:{0} 毫秒 rn -->ReaderExecuted.Command:rn{1}", _stopwatch.ElapsedMilliseconds, command.CommandText);
            }
            base.ReaderExecuted(command, interceptionContext);
        }
        //保存执行的sql语句
        public void SaveCmdSql(DbCommand command)
        {
            log.Info(command.CommandText);
        }

    }

最后在Global.asax中注册下这个。

就可以记录sql语句了。

//EF监控
DbInterception.Add(new EFIntercepterLogging());

转自：https://www.cnblogs.com/lgxlsm/p/6305816.html