ASP.NET程序中常用代码汇总(二)
ASP.NET程序中常用代码汇总(二) Csdn blog 专家群 高海东
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=\''+e.Item.Style['BACKGROUND-COLOR']+'\'');e.Item.Attributes.Add( 'onmouseover','this.style.backgroundColor=\''+ '#EFF3F7'+'\'');}}16.模板列<ASP:TEMPLATECOLUMN visible='False' sortexpression='demo' headertext='ID'><ITEMTEMPLATE><ASP:LABEL text=’<%# DataBinder.Eval(Container.DataItem, 'ArticleID')%>’ runat='server' width='80%' id='lblColumn' /></ITEMTEMPLATE></ASP:TEMPLATECOLUMN><ASP:TEMPLATECOLUMN headertext='选中'><HEADERSTYLE wrap='False' horizontalalign='Center'></HEADERSTYLE><ITEMTEMPLATE><ASP:CHECKBOX id='chkExport' runat='server' /></ITEMTEMPLATE><EDITITEMTEMPLATE><ASP:CHECKBOX id='chkExportON' runat='server' enabled='true' /></EDITITEMTEMPLATE></ASP:TEMPLATECOLUMN>后台代码protected void CheckAll_CheckedChanged(object sender, System.EventArgs e){//改变列的选定,实现全选或全不选。CheckBox chkExport ;if( CheckAll.Checked){foreach(DataGridItem oDataGridItem in MyDataGrid.Items){chkExport = (CheckBox)oDataGridItem.FindControl('chkExport');chkExport.Checked = true;}}else{foreach(DataGridItem oDataGridItem in MyDataGrid.Items){chkExport = (CheckBox)oDataGridItem.FindControl('chkExport');chkExport.Checked = false;}}}17.数字格式化【<%#Container.DataItem('price')%>的结果是500.0000,怎样格式化为500.00?】<%#Container.DataItem('price','{0:¥#,##0.00}')%>int i=123456;string s=i.ToString('###,###.00');18.日期格式化【aspx页面内:<%# DataBinder.Eval(Container.DataItem,'Company_Ureg_Date')%>
显示为: 2004-8-11 19:44:28
我只想要:2004-8-11 】
<%# DataBinder.Eval(Container.DataItem,'Company_Ureg_Date','{0:yyyy-M-d}')%>
应该如何改?
【格式化日期】
取出来,一般是object((DateTime)objectFromDB).ToString('yyyy-MM-dd');
【日期的验证表达式】
A.以下正确的输入格式: [2004-2-29], [2004-02-29 10:29:39 pm], [2004/12/31]
^((\d{2}(([02468][048])|([13579][26]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|([1-2][0-9])))))|(\d{2}(([02468][1235679])|([13579][01345789]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\s(((0?[1-9])|(1[0-2]))\:([0-5][0-9])((\s)|(\:([0-5][0-9])\s))([AM|PM|am|pm]{2,2})))?$
B.以下正确的输入格式:[0001-12-31], [9999 09 30], [2002/03/03]
^\d{4}[\-\/\s]?((((0[13578])|(1[02]))[\-\/\s]?(([0-2][0-9])|(3[01])))|(((0[469])|(11))[\-\/\s]?(([0-2][0-9])|(30)))|(02[\-\/\s]?[0-2][0-9]))$
19【大小写转换】
HttpUtility.HtmlEncode(string);
HttpUtility.HtmlDecode(string);
20.如何设定全局变量
Global.asax中
Application_Start()事件中
添加Application[属性名] = xxx;