C# WinForm捕獲全域異常

C# WinForm捕獲全域異常

　　許多小公司的項目都缺少異常處理模組，我們也是。經常會出現這種情況，使用者在UI介面操作，就直接跳出堆棧調用的異常資訊對話方塊，老闆看到那叫一個火啊！你們的代碼怎麼天天出現亂碼。呵呵！這就是沒有異常捕獲處理導致的，現在許多人寫代碼都沒意識處理異常，只要實現功能就好，我的許多組員也是如此。

　　項目剛接手，所以打算做一個異常全域捕獲，統一處理的模式，採用具體詳細資料的對話方塊提醒與記錄檔儲存方式。以下是根據網上找的C#winform全域異常捕獲做了點修改。　

static class Program
     {
         /// <summary>
         /// 應用程式的主進入點。
         /// </summary>
         [STAThread]
         static void Main()
         {
             try
             {
                 //設定應用程式處理異常方式：ThreadException處理
                 Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
                 //處理UI線程異常
                 Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
                 //處理非UI線程異常
                 AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
 
                 #region 應用程式的主進入點
                 Application.EnableVisualStyles();
                 Application.SetCompatibleTextRenderingDefault(false);
                 Application.Run(new Form1());
                 #endregion
             }
             catch (Exception ex)
             {
                 string str = GetExceptionMsg(ex,string.Empty);
                 MessageBox.Show(str, "系統錯誤", MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
         }
 
 
         static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
         {
             string str = GetExceptionMsg(e.Exception, e.ToString());
             MessageBox.Show(str, "系統錯誤", MessageBoxButtons.OK, MessageBoxIcon.Error);
             //LogManager.WriteLog(str);
         }
 
         static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
         {
             string str = GetExceptionMsg(e.ExceptionObject as Exception, e.ToString());
             MessageBox.Show(str, "系統錯誤", MessageBoxButtons.OK, MessageBoxIcon.Error);
             //LogManager.WriteLog(str);
         }
 
         /// <summary>
         /// 產生自訂異常訊息
         /// </summary>
         /// <param name="ex">異常對象</param>
         /// <param name="backStr">備用異常訊息：當ex為null時有效</param>
         /// <returns>例外狀況字串文本</returns>
         static string GetExceptionMsg(Exception ex,string backStr)
         {
             StringBuilder sb = new StringBuilder();
             sb.AppendLine("****************************異常文本****************************");
             sb.AppendLine("【出現時間】：" + DateTime.Now.ToString());
             if (ex != null)
             {               
                 sb.AppendLine("【異常類型】：" + ex.GetType().Name);
                 sb.AppendLine("【異常資訊】：" + ex.Message);
                 sb.AppendLine("【堆棧調用】：" + ex.StackTrace);
             }
             else
             {
                 sb.AppendLine("【未處理異常】：" + backStr);
             }
             sb.AppendLine("***************************************************************");
             return sb.ToString();
         }
     }

-----------------
配合用log4.net做日誌記錄

下面這段配置放在app.config裡,放在<configuration>下即可

------config begin-------
  <configSections>
    <section name="log4net"  type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
  </configSections>
  <log4net debug="true">
    <logger name="Admin">
      <!--control log level: ALL|DEBUG|INFO|WARN|ERROR|FATAL|OFF-->
      <level value="DEBUG" />
      <appender-ref ref="rollingFile" />
    </logger>
    <appender  name="rollingFile" type="log4net.Appender.RollingFileAppender,log4net" >
      <param name="File" type=""  value="Logs\\" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="10"/>
      <param name="RollingStyle" value="Date" />
      <param name="DatePattern" value="yyyyMMdd&quot;.log&quot;" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%d  %5p: %m%n" />
      </layout>
    </appender>
  </log4net>

--- config end---

log.cs 類檔案,放在一個公用的地方,即可

程式裡要記錄的地方直接用
ShareLibrary.Log.Debug(str);
或者
ShareLibrary.Log.Debug(ex);

---------- cs begin-----------

using System;
using System.Collections.Generic;
using System.Text;
using log4net;

namespace ShareLibrary
{
    public class Log
    {
       
        private static log4net.ILog log = log4net.LogManager.GetLogger("Admin");
        public static void Debug(string message)
        {
            if (log.IsDebugEnabled)
            {
                log.Debug(message);
            }
        }
        /// <summary>
        /// 記錄異常的相關資訊,log4net
        /// </summary>
        /// <param name="ex1"></param>
        public static void Debug(System.Exception ex1)
        {
            if (!log.IsDebugEnabled)
            {
                //若不可用,重新設定
                log4net.Config.XmlConfigurator.Configure();
            }
            log.Debug(ex1.Message.ToString() + "\r\n" + ex1.Source.ToString() + "\r\n" + ex1.TargetSite.ToString() + "\r\n" + ex1.StackTrace.ToString());
            //if (log.IsDebugEnabled)
            //{

               
            //    log.Debug(ex1.Message.ToString() + "\r\n" + ex1.Source.ToString() + "\r\n" + ex1.TargetSite.ToString() + "\r\n" + ex1.StackTrace.ToString());
            //}
           
        }
        public static void Error(string message)
        {
            if (log.IsErrorEnabled)
            {
                log.Error(message);
            }
        }
        public static void Fatal(string message)
        {

            if (log.IsFatalEnabled)
            {
                log.Fatal(message);
            }
        }
        public static void Info(string message)
        {
            if (log.IsInfoEnabled)
            {
                log.Info(message);
            }
        }

        public static void Warn(string message)
        {
            if (log.IsWarnEnabled)
            {
                log.Warn(message);
            }
        }
    }
}

----------- cs 結束---------------