.NET开发中自定义异常处理源代码

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   //自定义异常处理类
using System;
using System.Diagnostics;
namespace MyAppException
{
  /// <summary>
  /// 从系统异常类ApplicationException继承的应用程序异常处理类。
  /// 自动将异常内容记录到Windows NT/2000的应用程序日志
  /// </summary>
  public class AppException:System.ApplicationException
  {
  public AppException()
  {
  if (ApplicationConfiguration.EventLogEnabled)LogEvent("出现一个未知错误。");
  }
  public AppException(string message)
  {
  LogEvent(message);
  }
  public AppException(string message,Exception innerException)
  {
  LogEvent(message);
  if (innerException != null)
  {
  LogEvent(innerException.Message);
  }
  }
  //日志记录类
  using System;
  using System.Configuration;
  using System.Diagnostics;
  using System.IO;
  using System.Text;
  using System.Threading;
  namespace MyEventLog
  {
  /// <summary>
  /// 事件日志记录类,提供事件日志记录支持
  /// <remarks>
  /// 定义了4个日志记录方法 (error, warning, info, trace)
  /// </remarks>
  /// </summary>
  public class ApplicationLog
  {
  /// <summary>
  /// 将错误信息记录到Win2000/NT事件日志中
  /// <param name="message">需要记录的文本信息</param>
  /// </summary>
  public static void WriteError(String message)
  {
  WriteLog(TraceLevel.Error, message);
  }
  /// <summary>
  /// 将警告信息记录到Win2000/NT事件日志中
  /// <param name="message">需要记录的文本信息</param>
  /// </summary>
  public static void WriteWarning(String message)
  {
  WriteLog(TraceLevel.Warning, message);  
  }
  /// <summary>
  /// 将提示信息记录到Win2000/NT事件日志中
  /// <param name="message">需要记录的文本信息</param>
  /// </summary>
  public static void WriteInfo(String message)
  {
  WriteLog(TraceLevel.Info, message);
  }
  /// <summary>
  /// 将跟踪信息记录到Win2000/NT事件日志中
  /// <param name="message">需要记录的文本信息</param>
  /// </summary>
  public static void WriteTrace(String message)
  {
  WriteLog(TraceLevel.Verbose, message);
  }
  /// <summary>
  /// 格式化记录到事件日志的文本信息格式
  /// <param name="ex">需要格式化的异常对象</param>
  /// <param name="catchInfo">异常信息标题字符串.</param>
  /// <retvalue>
  /// <para>格式后的异常信息字符串,包括异常内容和跟踪堆栈.</para>
  /// </retvalue>
  /// </summary>
  public static String FormatException(Exception ex, String catchInfo)
  {
  StringBuilder strBuilder = new StringBuilder();
  if (catchInfo != String.Empty)
  {
  strBuilder.Append(catchInfo).Append("\r\n");
  }
  strBuilder.Append(ex.Message).Append("\r\n").Append(ex.StackTrace);
  return strBuilder.ToString();
  }
  /// <summary>
  /// 实际事件日志写入方法
  /// <param name="level">要记录信息的级别(error,warning,info,trace).</param>
  /// <param name="messageText">要记录的文本.</param>
  /// </summary>
  private static void WriteLog(TraceLevel level, String messageText)
  {
  try
  {
  EventLogEntryType LogEntryType;
  switch (level)
  {
  case TraceLevel.Error:
  LogEntryType = EventLogEntryType.Error;
  break;
  case TraceLevel.Warning:
  LogEntryType = EventLogEntryType.Warning;
  break;
  case TraceLevel.Info:
  LogEntryType = EventLogEntryType.Information;
  break;
  case TraceLevel.Verbose:
  LogEntryType = EventLogEntryType.SuccessAudit;
  break;
  default:
  LogEntryType = EventLogEntryType.SuccessAudit;
  break;
  }
  EventLog eventLog = new EventLog("Application", ApplicationConfiguration.EventLogMachineName, ApplicationConfiguration.EventLogSourceName );
  //写入事件日志
  eventLog.WriteEntry(messageText, LogEntryType);
  }
  catch {} //忽略任何异常
  }
  } //class ApplicationLog
}

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