ASP.NET程序中常用代码汇总(二)

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11.自定义异常处理

// 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
}

12.Panel 横向滚动,纵向自动扩展

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

13.回车转换成Tab

<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>

onkeydown = " if(event.keyCode==13) event.keyCode=9 "
**
**

14.DataGrid超级连接列

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

15.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

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