asp.net 编程 实用语句(6条)_实用技巧

分享到:

1.Panel 横向滚动,纵向自动扩展
<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>
(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");
}
3.DataGrid超级连接列
DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"
4.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
}
5.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"+"\"");
  }
}
6.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" 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;
  }
  }
}

昵    称:
验证码:

相关文档: