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  • asp.net非常实用语句2126条

    21.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
    }


    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"+""");
      }
    }


    26.模板列


    <ASP:TEMPLATECOLUMN visible="False" sortexpression="demo"

    headertext="ID">
    <ITEMTEMPLATE>
    <ASP LABEL text=’<%# DataBinder.eval_r(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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  • 原文地址:https://www.cnblogs.com/eagleking0318/p/6521525.html
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