,转ASP.NET程序中常用代码汇总

1.打开新的窗口并传送参数:

//传送参数:

response.write("<script>window.open(’*.aspx?);

2.为按钮添加确定对话框

Button1.Attributes.Add("onclick","return confirm(’确认?’)");

button.attributes.add("onclick","if(confirm(’are you sure?’)){return true;}else{return false;}")

3.删除表格选定记录

int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];

string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()

4.删除表格记录警告

private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)

{

 switch(e.Item.ItemType)

 {

  case ListItemType.Item :

  case ListItemType.AlternatingItem :

  case ListItemType.EditItem:

   TableCell myTableCell;

   myTableCell = e.Item.Cells[14];

   LinkButton myDeleteButton ;

   myDeleteButton = (LinkButton)myTableCell.Controls[0];

   myDeleteButton.Attributes.Add("onclick","return confirm(’您是否确定要删除这条信息’);");

   break;

  default:

   break;

 }

}

5.点击表格行链接另一页

private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)

{

 //点击表格打开

 if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

  e.Item.Attributes.Add("onclick","window.open(’Default.aspx?)%>’ />

7.表格点击改变颜色

if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)

{

 e.Item.Attributes.Add("onclick","this.style.backgroundColor=’#99cc00’;

    this.style.color=’buttontext’;this.style.cursor=’default’;");

}

  写在DataGrid的_ItemDataBound里

if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)

{

e.Item.Attributes.Add("onmouseover","this.style.backgroundColor=’#99cc00’;

   this.style.color=’buttontext’;this.style.cursor=’default’;");

e.Item.Attributes.Add("onmouseout","this.style.backgroundColor=’’;this.style.color=’’;");

}

8.关于日期格式

日期格式设定

DataFormatString="{0:yyyy-MM-dd}"

  //我觉得应该在itembound事件中

e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))

9.获取错误信息并到指定页面

//不要使用Response.Redirect,而应该使用Server.Transfer

  e.g

// in global.asax

protected void Application_Error(Object sender, EventArgs e) {

if (Server.GetLastError() is HttpUnhandledException)

Server.Transfer("MyErrorPage.aspx");

//其余的非HttpUnhandledException异常交给ASP.NET自己处理就okay了 :)

}

  //Redirect会导致post-back的产生从而丢失了错误信息,所以页面导向应该直接在服务器端执行,这样就可以在错误处理页面得到出错信息并进行相应的处理

10.清空Cookie

Cookie.Expires=[DateTime];

Response.Cookies("UserName").Expires = 0

11.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

}

12.Panel 横向滚动,纵向自动扩展

<asp:panel ></asp:panel>

13.回车转换成Tab

<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>

onkeydown="if(event.keyCode==13) event.keyCode=9"

14.DataGrid超级连接列

DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?

15.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"+"\"");

 }

}

16.模板列

<ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID">

<ITEMTEMPLATE>

<ASP:LABEL text=’<%# DataBinder.Eval(Container.DataItem, "ArticleID")%>’ runat="server" width="80%" />

</ITEMTEMPLATE>

</ASP:TEMPLATECOLUMN>

<ASP:TEMPLATECOLUMN headertext="选中">

<HEADERSTYLE wrap="False" horizontalalign="Center"></HEADERSTYLE>

<ITEMTEMPLATE>

<ASP:CHECKBOX />

</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;

  }

 }

}

17.数字格式化

【<%#Container.DataItem("price")%>的结果是500.0000,怎样格式化为500.00?】

<%#Container.DataItem("price","{0:¥#,##0.00}")%>

int i=123456;

string s=i.ToString("###,###.00");

18.日期格式化

【aspx页面内:<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")%>

  显示为: 2004-8-11 19:44:28

  我只想要:2004-8-11 】 取{0:d}即可

<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date","{0:yyyy-M-d}")%>

  应该如何改?

  【格式化日期】

  取出来,一般是object((DateTime)objectFromDB).ToString("yyyy-MM-dd");

  【日期的验证表达式】

  A.以下正确的输入格式: [2004-2-29], [2004-02-29 10:29:39 pm], [2004/12/31]

^((\d{2}(([02468][048])|([13579][26]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|([1-2][0-9])))))|(\d{2}(([02468][1235679])|([13579][01345789]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\s(((0?[1-9])|(1[0-2]))\:([0-5][0-9])((\s)|(\:([0-5][0-9])\s))([AM|PM|am|pm]{2,2})))?$

  B.以下正确的输入格式:[0001-12-31], [9999 09 30], [2002/03/03]

^\d{4}[\-\/\s]?((((0[13578])|(1[02]))[\-\/\s]?(([0-2][0-9])|(3[01])))|(((0[469])|(11))[\-\/\s]?(([0-2][0-9])|(30)))|(02[\-\/\s]?[0-2][0-9]))$

19【大小写转换】

HttpUtility.HtmlEncode(string);

HttpUtility.HtmlDecode(string);

20.如何设定全局变量

  Global.asax中

  Application_Start()事件中

  添加Application[属性名] = xxx;