Thursday, November 6, 2008

几种ASP.Net常用的代码

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");

Demo:
default.aspx

<head runat="server">
<title></title>
<script language="javascript" type="text/javascript">
function RedirectToOtherPage()
{
// alert(document.getElementById("DropDownList1").value);
window.open("DestinationPage.aspx?value="+document.getElementById

("DropDownList1").value,"ref");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<center>
<h1>Redirect to another page and transfer value</h1>
<br /><br /><br />
<asp:DropDownList ID="DropDownList1" runat="server" Width="150">
<asp:ListItem>Kevin</asp:ListItem>
<asp:ListItem>Mary</asp:ListItem>
<asp:ListItem>Gary</asp:ListItem>
<asp:ListItem>Derek</asp:ListItem>
<asp:ListItem>John</asp:ListItem>
</asp:DropDownList> 
<asp:Button ID="Button1" runat="server" Text="TransferWithString"

OnClientClick="RedirectToOtherPage()" /> 
 
 
 
</center>
</div>
</form>
</body>
********************************
destination.aspx.cs

public partial class DestinationPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
string msg = Request.QueryString["value"].ToString();
Response.Write(msg);
}
}
}

2.为按钮添加对话框 Button1.Attributes.Add("onclick","return confirm(’确认?’)");

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

false;}")

Demo:
default.aspx

<asp:Button ID="Button2" runat="server" Text="Button" onclick="Button2_Click" />
<asp:HiddenField ID="Text1" runat="server" />

************************
default.aspx.cs

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//Button2.Attributes.Add("onclick", "if(confirm('are you sure?')){return true;}

else{return false;}");
Button2.Attributes.Add("onclick", "if(confirm('are you sure?'))

{document.getElementById('Text1').value='kevin';}else{document.getElementById

('Text1').value='false';}");

}
protected void Button2_Click(object sender, EventArgs e)
{
if (Text1.Value == "kevin")
{
Response.Write("this is true....");
}
else
{
Response.Write("this is 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?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 if(e.Item.ItemType ==

ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) {  string

OrderItemID =e.item.cells[1].Text;  ...  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 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 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={0}"    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> <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;   }  

} }    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 】 <%# 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]))$   【大小写转换】

HttpUtility.HtmlEncode(string); HttpUtility.HtmlDecode(string)
19.如何设定全局变量   Global.asax中   Application_Start()事件中   添加Application[属

性名] = xxx;   就是你的全局变量    20.怎样作到HyperLinkColumn生成的连接后,点击连接,

打开新窗口?   HyperLinkColumn有个属性Target,将器值设置成"_blank"即可.(Target="_blank")

  【ASPNETMENU】点击菜单项弹出新窗口   在你的menuData.xml文件的菜单项中加入

URLTarget="_blank",如: <?xml version="1.0" encoding="GB2312"?> <MenuData

ImagesBaseURL="images/"> <MenuGroup> <MenuItem Label="内参信息" URL="Infomation.aspx"

> <MenuGroup ID="BBC"> <MenuItem Label="公告信息" URL="Infomation.aspx"

URLTarget="_blank" LeftIcon="file.gif"/> <MenuItem Label="编制信息简报"

URL="NewInfo.aspx" LeftIcon="file.gif" /> ...... 21.读取DataGrid控件TextBox值 foreach

(DataGrid dgi in yourDataGrid.Items) {  TextBox tb = (TextBox)dgi.FindControl

("yourTextBoxId");  tb.Text.... }    23.在DataGrid中有3个模板列包含Textbox分别为

DG_ShuLiang (数量) DG_DanJian(单价) DG_JinE(金额)分别在5.6.7列,要求在录入数量及单价的时候

自动算出金额即:数量*单价=金额还要求录入时限制为 数值型.我如何用客户端脚本实现这个功能?   

〖思归〗 <asp:TemplateColumn HeaderText="数量"> <ItemTemplate> <asp:TextBox

id="ShuLiang" runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")%

>’ onkeyup="javascript:DoCal()" /> <asp:RegularExpressionValidator id="revS"

runat="server" ControlToValidate="ShuLiang" ErrorMessage="must be integer"

ValidationExpression="^\d+$" /> </ItemTemplate> </asp:TemplateColumn> <

asp:TemplateColumn HeaderText="单价"> <ItemTemplate> <asp:TextBox id="DanJian" runat=’

server’ Text=’<%# DataBinder.Eval(Container.DataItem,"DG_DanJian")%>’

onkeyup="javascript:DoCal()" /> <asp:RegularExpressionValidator id="revS2" runat="server"

ControlToValidate="DanJian" ErrorMessage="must be numeric" ValidationExpression="^\d+

(\.\d*)?$" /> </ItemTemplate> </asp:TemplateColumn> <asp:TemplateColumn HeaderText="

金额"> <ItemTemplate> <asp:TextBox id="JinE" runat=’server’ Text=’<%# DataBinder.Eval

(Container.DataItem,"DG_JinE")%>’ /> </ItemTemplate> </asp:TemplateColumn><script

language="javascript"> function DoCal() {  var e = event.srcElement;  var row =

e.parentNode.parentNode;  var txts = row.all.tags("INPUT");  if (!txts.length ||

txts.length < 3)   return;  var q = txts[txts.length-3].value;  var p = txts

[txts.length-2].value;  if (isNaN(q) || isNaN(p))   return;  q = parseInt(q);  p =

parseFloat(p);  txts[txts.length-1].value = (q * p).toFixed(2); } </script> 24.datagrid

选定比较底下的行时,为什么总是刷新一下,然后就滚动到了最上面,刚才选定的行因屏幕的关系就看

不到了。page_load page.smartNavigation=true    25.在Datagrid中修改数据,当点击编辑键时,

数据出现在文本框中,怎么控制文本框的大小 ? private void DataGrid1_ItemDataBound(obj

sender,DataGridItemEventArgs e) {  for(int i=0;i<e.Item.Cells.Count-1;i++)   if

(e.Item.ItemType==ListItemType.EditType)   {    e.Item.Cells[i].Attributes.Add

("Width", "80px")   } }    26.对话框 private static string ScriptBegin = "<script

language=\"JavaScript\">"; private static string ScriptEnd = "</script>"; public static

void ConfirmMessageBox(string PageTarget,string Content) {  string ConfirmContent="var

retValue=window.confirm(’"+Content+"’);"+"if(retValue){window.location=’"+PageTarget+"’;}";

 ConfirmContent=ScriptBegin + ConfirmContent + ScriptEnd;  Page ParameterPage = (Page)

System.Web.HttpContext.Current.Handler;  ParameterPage.RegisterStartupScript

("confirm",ConfirmContent);  //Response.Write(strScript); }    27. 将时间格式化:string

aa=DateTime.Now.ToString("yyyy年MM月dd日"); 1.1 取当前年月日时分秒

currentTime=System.DateTime.Now; 1.2 取当前年 int 年= DateTime.Now.Year;    1.3 取当前月

int 月= DateTime.Now.Month;    1.4 取当前日 int 日= DateTime.Now.Day;    1.5 取当前时

int 时= DateTime.Now.Hour;    1.6 取当前分 int 分= DateTime.Now.Minute;    1.7 取当前秒

int 秒= DateTime.Now.Second;    1.8 取当前毫秒 int 毫秒= DateTime.Now.Millisecond;   

28.自定义分页代码: 先定义变量 : public static int pageCount; //总页面数 public static

int curPageIndex=1; //当前页面    下一页: if(DataGrid1.CurrentPageIndex <

(DataGrid1.PageCount - 1)) {  DataGrid1.CurrentPageIndex += 1;  curPageIndex+=1; } bind

(); // DataGrid1数据绑定函数    上一页: if(DataGrid1.CurrentPageIndex >0) {  

DataGrid1.CurrentPageIndex += 1;  curPageIndex-=1; } bind(); // DataGrid1数据绑定函数   

直接页面跳转: int a=int.Parse(JumpPage.Value.Trim());//JumpPage.Value.Trim()为跳转值 if(a

<DataGrid1.PageCount) {  this.DataGrid1.CurrentPageIndex=a; } bind(); 29.DataGrid使用:

添加删除确认: private void DataGrid1_ItemCreated(object sender,

System.Web.UI.WebControls.DataGridItemEventArgs e) {  foreach(DataGridItem di in

this.DataGrid1.Items)  {   if

(di.ItemType==ListItemType.Item||di.ItemType==ListItemType.AlternatingItem)   {    

((LinkButton)di.Cells[8].Controls[0]).Attributes.Add("onclick","return confirm(’确认删除此

项吗?’);");   }  } }    样式交替: ListItemType itemType = e.Item.ItemType; if

(itemType == ListItemType.Item ) {  e.Item.Attributes["onmouseout"] =

"javascript:this.style.backgroundColor=’#FFFFFF’;";  e.Item.Attributes["onmouseover"] =

"javascript:this.style.backgroundColor=’#d9ece1’;cursor=’hand’;" ; } else if( itemType ==

ListItemType.AlternatingItem) {  e.Item.Attributes["onmouseout"] =

"javascript:this.style.backgroundColor=’#a0d7c4’;";  e.Item.Attributes["onmouseover"] =

"javascript:this.style.backgroundColor=’#d9ece1’;cursor=’hand’;" ; }    添加一个编号列:

DataTable dt= c.ExecuteRtnTableForAccess(sqltxt); //执行sql返回的DataTable DataColumn

dc=dt.Columns.Add("number",System.Type.GetType("System.String")); for(int i=0;i<

dt.Rows.Count;i++) {  dt.Rows[i]["number"]=(i+1).ToString(); } DataGrid1.DataSource=dt;

DataGrid1.DataBind();   DataGrid1中添加一个CheckBox,页面中添加一个全选框 private void

CheckBox2_CheckedChanged(object sender, System.EventArgs e) {  foreach(DataGridItem

thisitem in DataGrid1.Items)  {   ((CheckBox)thisitem.Cells[0].Controls

[1]).Checked=CheckBox2.Checked;  } }    将当前页面中DataGrid1显示的数据全部删除 foreach

(DataGridItem thisitem in DataGrid1.Items) {  if(((CheckBox)thisitem.Cells[0].Controls

[1]).Checked)  {   string strloginid= DataGrid1.DataKeys[thisitem.ItemIndex].ToString();

  Del (strloginid); //删除函数  } }    30.当文件在不同目录下,需要获取数据库连接字符

串(如果连接字符串放在Web.config,然后在Global.asax中初始化) 在Application_Start中添加以下

代码: Application["ConnStr"]

=this.Context.Request.PhysicalApplicationPath+ConfigurationSettings.    AppSettings

["ConnStr"].ToString();    31. 变量.ToString() 字符型转换 转为字符串 12345.ToString

("n"); //生成 12,345.00 12345.ToString("C"); //生成 ¥12,345.00 12345.ToString("e"); //生成

1.234500e+004 12345.ToString("f4"); //生成 12345.0000 12345.ToString("x"); //生成 3039 (16

进制) 12345.ToString("p"); //生成 1,234,500.00%    32、变量.Substring(参数1,参数2); 截取

字串的一部分,参数1为左起始位数,参数2为截取几位。 如:string s1 = str.Substring(0,2); 33.

在自己的网站上登陆其他网站:(如果你的页面是通过嵌套方式的话,因为一个页面只能有一个FORM,这

时可以导向另外一个页面再提交登陆信息) <SCRIPT language="javascript"> <!--  function

gook(pws)  {   frm.submit();  } //--> </SCRIPT> <body leftMargin="0" topMargin="0"

onload="javascript:gook()" marginwidth="0" marginheight="0"> <form name="frm" action="

http://220.194.55.68:6080/login.php?retid=7259 " method="post"> <tr> <td> <input

id="f_user" type="hidden" size="1" name="f_user" runat="server"> <input id="f_domain"

type="hidden" size="1" name="f_domain" runat="server"> <input class="box" id="f_pass"

type="hidden" size="1" name="pwshow" runat="server"> <INPUT id="lng" type="hidden"

maxLength="20" size="1" value="5" name="lng"> <INPUT id="tem" type="hidden" size="1"

value="2" name="tem"> </td> </tr> </form>   文本框的名称必须是你要登陆的网页上的名

称,如果源码不行可以用vsniffer 看看。   下面是获取用户输入的登陆信息的代码: string name;

name=Request.QueryString["EmailName"]; try {  int a=name.IndexOf("@",0,name.Length);  

f_user.Value=name.Substring(0,a);  f_domain.Value=name.Substring(a+1,name.Length-(a+1));

 f_pass.Value=Request.QueryString["Psw"]; } catch {  Script.Alert("错误的邮箱!");  

Server.Transfer("index.aspx"); }

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