asp.net 编程 实用语句(6条)_asp.net教程-查字典教程网
asp.net 编程 实用语句(6条)
asp.net 编程 实用语句(6条)
发布时间:2016-12-29 来源:查字典编辑
摘要:1.Panel横向滚动,纵向自动扩展<asp:panelstyle="overflow-x:scroll;overflow-y:auto;"...

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("rn");

}

strBuilder.Append(ex.Message).Append("rn").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;

}

}

}

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