新建一个类继承自 HandleErrorAttribute,然后重写OnException这个方法
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public class LogHandleErrorAttribute: HandleErrorAttribute
{
private readonly ILoggerService _log;
public LogHandleErrorAttribute(ILoggerService log)
{
this._log = log;
}
public override void OnException(ExceptionContext filterContext)
{
base.OnException(filterContext);
_log.Error("被系统过滤捕获的异常" + filterContext.Exception.ToString());
filterContext.HttpContext.Response.Redirect("/");
}
}
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只要程序出错就会执行这个方法。
注册定义好的异常过虑器
打开App_Start文件夹中FilterConfig.cs修改
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| public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new LogHandleErrorAttribute());
}
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先写好ILogService接口
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| public interface ILoggerService
{
void Info(string message);
void Warn(string message);
void Debug(string message);
void Error(string message);
void Error(Exception ex);
void Fatal(string message);
void Fatal(Exception ex);
}
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自定义记录日志
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| public class MyLogHelper:ILoggerService
{
private static Queue<string> _execptionQueue;
static MyLogHelper()
{
_execptionQueue = new Queue<string>();
ThreadPool.QueueUserWorkItem(m =>
{
while (true)
{
if (_execptionQueue.Count > 0)
{
var ex = _execptionQueue.Dequeue();
if (ex != null)
{
WriteLog(ex);
}
else
{
Thread.Sleep(2000);
}
}
else
{
Thread.Sleep(2000);
}
}
});
}
public void Info(string message)
{
throw new NotImplementedException();
}
public void Warn(string message)
{
throw new NotImplementedException();
}
public void Debug(string message)
{
throw new NotImplementedException();
}
public void Error(string message)
{
_execptionQueue.Enqueue(message);
}
public void Error(Exception ex)
{
throw new NotImplementedException();
}
public void Fatal(string message)
{
throw new NotImplementedException();
}
public void Fatal(Exception ex)
{
throw new NotImplementedException();
}
public static void WriteLog(string exception)
{
lock (_execptionQueue)
{
File.AppendAllText($@"C:\log_{DateTime.Now.ToString("yy-MM-dd")}", exception);
}
}
}
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主要先使用队列将异常信息记录在内存中，通过静态构造函数在里面开启新线程每两秒往文件中记录异常信息
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| public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new LogHandleErrorAttribute(new MyLogHelper()));
}
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通过log4net记录日志
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| public class LogHelper:ILoggerService
{
private readonly ILog _logger;
private static Queue<string> _execptionQueue;
public LogHelper()
{
_logger = LogManager.GetLogger(
System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
_execptionQueue = new Queue<string>();
ThreadPool.QueueUserWorkItem(m =>
{
while (true)
{
if (_execptionQueue.Count > 0)
{
var ex = _execptionQueue.Dequeue();
if (ex != null)
{
_logger.Error(ex);
}
else
{
Thread.Sleep(2000);
}
}
else
{
Thread.Sleep(2000);
}
}
});
}
public void Info(string message)
{
_logger.Info(message);
}
public void Warn(string message)
{
_logger.Warn(message);
}
public void Debug(string message)
{
_logger.Debug(message);
}
public void Error(string message)
{
_execptionQueue.Enqueue(message);
}
public void Error(Exception ex)
{
_logger.Error(ex.Message, ex);
}
public void Fatal(string message)
{
_logger.Fatal(message);
}
public void Fatal(Exception ex)
{
_logger.Fatal(ex.Message, ex);
}
}
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| public class FilterConfig
{
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new LogHandleErrorAttribute(new LogHelper()));
InitLogHandleError();
}
public static void InitLogHandleError()
{
log4net.Config.XmlConfigurator.Configure();
}
}
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web.config
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| <configuration>
<configSections>
......
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4Net" />
</configSections>
......
<log4net>
<root>
<level value="ALL" />
<appender-ref ref="SysAppender" />
</root>
<logger name="WebLogger">
<level value="DEBUG" />
</logger>
<appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net">
<param name="File" value="App_Data/" />
<param name="AppendToFile" value="true" />
<param name="RollingStyle" value="Date" />
<param name="DatePattern" value=""Logs_"yyyyMMdd".txt"" />
<param name="StaticLogFileName" value="false" />
<layout type="log4net.Layout.PatternLayout,log4net">
<conversionPattern value="{%level}%date{MM/dd HH:mm:ss} - %message%newline%newline"/>
</layout>
</appender>
<appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
</layout>
</appender>
</log4net>
</configuration>
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