asp.net 编程 实用语句(6条)
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;
}
}
}