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ASP.NET程序中常用的三十三种代码一

1. 打开新的窗口并传送参数: 

传送参数:

response.write("<script>window.open(’*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"’)</script>")

接收参数:

string a = Request.QueryString("id");

string b = Request.QueryString("id1");

2.为按钮添加对话框

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

button.attributes.add(" 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(" confirm(’您是否确定要删除这条信息’);");

break;

default:

}

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?id=" + e.Item.Cells[0].Text + "’);");

双击表格连接到另一页

在itemDataBind事件中

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

string OrderItemID =e.item.cells[1].Text;

...

e.item.Attributes.Add("ondblclick", "location.href=’../ShippedGrid.aspx?id=" + OrderItemID + "’");

双击表格打开新一页

e.item.Attributes.Add("ondblclick", "open(’../ShippedGrid.aspx?id=" + OrderItemID + "’)");

6.表格超连接列传递参数

<asp:HyperLinkColumn Target="_blank" headertext="ID号" DataTextField="id" NavigateUrl="aaa.aspx?id=’

<%# DataBinder.Eval(Container.DataItem, "数据字段1")%>’ & name=’<%# DataBinder.Eval(Container.DataItem, "数据字段2")%>’ />

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

8.关于日期格式

日期格式设定

DataFormatString=""

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)

public AppException(string message,Exception innerException)

LogEvent(message);

if (innerException != null)

//日志记录类

using System.Configuration;

using System.IO;

using System.Text;

using System.Threading;

namespace MyEventLog

/// 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>

public class ApplicationLog

/// 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>

public static void WriteError(String message)

WriteLog(TraceLevel.Error, message);

/// 将警告信息记录到Win2000/NT事件日志中

public static void WriteWarning(String message)

WriteLog(TraceLevel.Warning, message);  

/// 将提示信息记录到Win2000/NT事件日志中

public static void WriteInfo(String message)

WriteLog(TraceLevel.Info, message);

/// 将跟踪信息记录到Win2000/NT事件日志中

public static void WriteTrace(String message)

WriteLog(TraceLevel.Verbose, message);

/// 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>

public static String FormatException(Exception ex, String catchInfo)

StringBuilder strBuilder = new StringBuilder();

if (catchInfo != String.Empty)

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

return strBuilder.ToString();

/// 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>

private static void WriteLog(TraceLevel level, String messageText)

try

EventLogEntryType LogEntryType;

switch (level)

case TraceLevel.Error:

LogEntryType = EventLogEntryType.Error;

case TraceLevel.Warning:

LogEntryType = EventLogEntryType.Warning;

case TraceLevel.Info:

LogEntryType = EventLogEntryType.Information;

case TraceLevel.Verbose:

LogEntryType = EventLogEntryType.SuccessAudit;

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 style="overflow-x:scroll;overflow-y:auto;"></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?ID="

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%" id="lblColumn" />

</ITEMTEMPLATE>

</ASP:TEMPLATECOLUMN>

<ASP:TEMPLATECOLUMN headertext="选中">

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

<ASP:CHECKBOX id="chkExport" runat="server" />

<EDITITEMTEMPLATE>

<ASP:CHECKBOX id="chkExportON" runat="server" enabled="true" />

</EDITITEMTEMPLATE>

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

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","")%>

int i=123456;

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

本文转自 参天树 51CTO博客,原文链接:http://blog.51cto.com/119244/48576,如需转载请自行联系原作者

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