EntityFramework优化：SQL语句日志

System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Text; using System.Data.Entity.Infrastructure.Interception; using System.Diagnostics; using System.Data.Common; using NLog; namespace Libing.Portal.Web.Common.Interceptors { public class NLogDbCommandInterceptor : DbCommandInterceptor { private static readonly Stopwatch watch = new Stopwatch(); private static readonly Logger logger = LogManager.GetCurrentClassLogger(); public override void ScalarExecuting(DbCommand command, DbCommandInterceptionContext<object> interceptionContext) { base.ScalarExecuting(command, interceptionContext); watch.Restart(); } public override void ScalarExecuted(DbCommand command, DbCommandInterceptionContext<object> interceptionContext) { watch.Stop(); if (interceptionContext.Exception != null) { logger.Error("Exception:{1} \r\n --> Error executing command: {0}", command.CommandText, interceptionContext.Exception.ToString()); } else { StringBuilder message = new StringBuilder(); message.AppendFormat("\r\n-->{0}", command.CommandText); foreach (DbParameter parameter in command.Parameters) { message.AppendFormat("\r\n-- {0}: ‘{1}‘ (Type = {2}, IsNullable = {3})", parameter.ParameterName, parameter.Value, parameter.DbType, parameter.IsNullable); } message.AppendFormat("\r\n-- Completed in {0} ms", watch.ElapsedMilliseconds, command); logger.Trace(message.ToString()); } base.ScalarExecuted(command, interceptionContext); } public override void NonQueryExecuting(DbCommand command, DbCommandInterceptionContext<int> interceptionContext) { base.NonQueryExecuting(command, interceptionContext); watch.Restart(); } public override void NonQueryExecuted(DbCommand command, DbCommandInterceptionContext<int> interceptionContext) { watch.Stop(); if (interceptionContext.Exception != null) { logger.Error("Exception:{1} \r\n --> Error executing command: {0}", command.CommandText, interceptionContext.Exception.ToString()); } else { StringBuilder message = new StringBuilder(); message.AppendFormat("\r\n-->{0}", command.CommandText); foreach (DbParameter parameter in command.Parameters) { message.AppendFormat("\r\n-- {0}: ‘{1}‘ (Type = {2}, IsNullable = {3})", parameter.ParameterName, parameter.Value, parameter.DbType, parameter.IsNullable); } message.AppendFormat("\r\n-- Completed in {0} ms", watch.ElapsedMilliseconds, command); logger.Trace(message.ToString()); } base.NonQueryExecuted(command, interceptionContext); } public override void ReaderExecuting(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext) { base.ReaderExecuting(command, interceptionContext); watch.Restart(); } public override void ReaderExecuted(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext) { watch.Stop(); if (interceptionContext.Exception != null) { logger.Error("Exception:{1} \r\n --> Error executing command: {0}", command.CommandText, interceptionContext.Exception.ToString()); } else { StringBuilder message = new StringBuilder(); message.AppendFormat("\r\n-->{0}", command.CommandText); foreach (DbParameter parameter in command.Parameters) { message.AppendFormat("\r\n-- {0}: ‘{1}‘ (Type = {2}, IsNullable = {3})", parameter.ParameterName, parameter.Value, parameter.DbType, parameter.IsNullable); } message.AppendFormat("\r\n-- Completed in {0} ms", watch.ElapsedMilliseconds, command); logger.Trace(message.ToString()); } base.ReaderExecuted(command, interceptionContext); } } } NLogDbCommandInterceptor.cs

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;

using System.Data.Entity.Infrastructure.Interception;
using Libing.Portal.Web.Common.Interceptors;

namespace Libing.Portal.Web.Data
{
    public class PortalContext : DbContext
    {
        static PortalContext()
        {
            Database.SetInitializer<PortalContext>(null);

            // 日志：Entity Framework生成的Sql语句
            DbInterception.Add(new NLogDbCommandInterceptor());
        }
    }
}

PortalContext.cs

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true">
  <targets>
    <target name="file" xsi:type="AsyncWrapper" queueLimit="5000" overflowAction="Discard">
      <target xsi:type="File"
              fileName="${basedir}/Logs/${shortdate}.log"
              layout="${longdate} ${level:uppercase=true} ${event-context:item=Action} ${message} ${event-context:item=Amount} ${stacktrace}"
              keepFileOpen="false"
              archiveFileName="${basedir}/Logs/${shortdate}.{##}.log"
              archiveAboveSize="1048576"
              encoding="UTF-8" />
    </target>
  </targets>
  <rules>
    <!--Trace->Debug->Info->Warn->Error->Fatal-->
    <logger name="*" minlevel="Trace" writeTo="file" />
  </rules>
</nlog>

NLog.config

EntityFramework优化：SQL语句日志

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