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The author:(作者)aaa
published in(发表于) 2013/12/18 8:26:38
菜鸟的最爱,.NET经典代码汇总(三)_.net资料_编程技术

菜鸟的最爱 .NET经典代码汇总(三)_.net资料_编程技术-你的首页-uuhomepage.com

  程序的学习是一个循序渐进的过程,一些常用的或经典代码应该保存下来以便日后使用。本文就给出一些.net的经典代码,希望对大家有所帮助……


  21.自定义异常处理


  //自定义异常处理类
  using System;
  using System.Diagnostics;
  namespace MyAppException
  {
  ///
  /// 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
  ///
  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
  {
  ///
  /// 事件日志记录类,提供事件日志记录支持
  ///
  /// 定义了4个日志记录方法 (error, warning, info, trace)
  ///
  ///
  public class ApplicationLog
  {
  ///
  /// 将错误信息记录到Win2000/NT事件日志中
  /// 需要记录的文本信息
  ///
  public static void WriteError(String message)
  {
  WriteLog(TraceLevel.Error, message);
  }
  ///
  /// 将警告信息记录到Win2000/NT事件日志中
  /// 需要记录的文本信息
  ///
  public static void WriteWarning(String message)
  {
  WriteLog(TraceLevel.Warning, message);
  }
  ///
  /// 将提示信息记录到Win2000/NT事件日志中
  /// 需要记录的文本信息
  ///
  public static void WriteInfo(String message)
  {
  WriteLog(TraceLevel.Info, message);
  }
  ///
  /// 将跟踪信息记录到Win2000/NT事件日志中
  /// 需要记录的文本信息
  ///
  public static void WriteTrace(String message)
  {
  WriteLog(TraceLevel.Verbose, message);
  }
  ///
  /// 格式化记录到事件日志的文本信息格式
  /// 需要格式化的异常对象
  /// 异常信息标题字符串.
  ///
  /// 格式后的异常信息字符串,包括异常内容和跟踪堆栈.
  ///
  ///
  public static String FormatException(Exception ex, String catchInfo)
  {
  StringBuilder strBuilder = new StringBuilder();
  if (catchInfo != String.Empty)
  {
  strBuilder.Append(catchInfo).Append(" ");
  }
  strBuilder.Append(ex.Message).Append(" ").Append(ex.StackTrace);
  return strBuilder.ToString();
  }
  ///
  /// 实际事件日志写入方法
  /// 要记录信息的级别(error,warning,info,trace).
  /// 要记录的文本.
  ///
  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
  }


  22.Panel 横向滚动,纵向自动扩展


<asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>


  23.回车转换成Tab


  (1)


<script language="javascript" for="document" event="onkeydown">
if(event.keyCode==13 && event.srcElement.type!=’button’ && event.srcElement.type!=’submit’ &&     event.srcElement.type!=’reset’ && event.srcElement.type!=’’&& event.srcElement.type!=’textarea’);
event.keyCode=9;
</script>


  (2) //当在有keydown事件的控件上敲回车时,变为tab


  public void Tab(System.Web .UI.WebControls .WebControl webcontrol)
  {
  webcontrol.Attributes .Add ("onkeydown", "if(event.keyCode==13) event.keyCode=9");
  }


  24.DataGrid超级连接列


  DataNavigateUrlField="字段名" DataNavigateUrlFormatString=http://xx/inc/delete.aspx?ID={0}


  25.DataGrid行随鼠标变色


  private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
  {
  if (e.Item.ItemType!=ListItemType.Header)
  {
  e.Item.Attributes.Add( "onmouseout","this.style.backgroundColor=""+e.Item.Style["BACKGROUND-COLOR"]+""");
  e.Item.Attributes.Add( "onmouseover","this.style.backgroundColor=""+ "#EFF3F7"+""");
  }
  }





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