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asp.net 编程 实用语句(6条)

  • 时间:2021-12-05 17:20 编辑: 来源: 阅读:
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摘要:asp.net 编程 实用语句(6条)
[b]1.Panel 横向滚动,纵向自动扩展[/b] <asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel> 2.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> [b](2) //当在有keydown事件的控件上敲回车时,变为tab[/b] public void Tab(System.Web .UI.WebControls .WebControl webcontrol) { webcontrol.Attributes .Add ("onkeydown", "if(event.keyCode==13) event.keyCode=9"); } [b]3.DataGrid超级连接列[/b] DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}" [b]4.自定义异常处理[/b] //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 } [b]5.DataGrid行随鼠标变色[/b] 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"+"\"");   } } [b]6.模板列[/b] <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" horiz></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;   }   } }
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