[C#(WebForm)] - ASPX常用代码-优快云博客

来源：http://www.fenbi360.net/content.aspx?id=1104&t=ct

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

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 " );

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;} " )

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 + " ') " );
}

★特别注意：【?id=】处不能为【?id =】

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.Inf:
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 >

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

示例：http://dotnet.aspx.cc/exam/enter2tab.aspx

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" />
......

最好将你的aspnetmenu升级到1.2版

21.委托讨论
http://community.youkuaiyun.com/Expert/topic/2651/2651579.xml?temp=.7183191
http://dev.youkuaiyun.com/develop/article/22/22951.shtm

22.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")% > ' οnkeyup="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")% > ' οnkeyup="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：

// 1.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?'); " );
}
}
}

// 2.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'; " ;
}

// 3.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();

// 4.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;
}
}

// 5.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 );

34.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" >

</ 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" >
< table >
< 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 >
</ table >
</ 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 " );
}

35.警告窗口

/// <summary>
/// 服务器端弹出alert对话框
/// </summary>
/// <param name="str_Message"> 提示信息,例子："不能为空!" </param>
/// <param name="page"> Page类 </param>
public void Alert( string str_Message,Page page)
{
page.RegisterStartupScript( "" , " <script>alert(' " + str_Message + " ');</script> " );
}

36.重载此警告窗口,使某控件获得焦点

/// <summary>
/// 服务器端弹出alert对话框，并使控件获得焦点
/// </summary>
/// <param name="str_Ctl_Name"> 获得焦点控件Id值,比如：txt_Name </param>
/// <param name="str_Message"> 提示信息,例子："请输入您姓名!" </param>
/// <param name="page"> Page类 </param>
public void Alert( string str_Ctl_Name, string str_Message,Page page)
{
page.RegisterStartupScript( "" , " <script>alert(' " + str_Message + " ');document.forms(0). " + str_Ctl_Name + " .focus(); document.forms(0). " + str_Ctl_Name + " .select();</script> " );
}

37.确认对话框

/// <summary>
/// 服务器端弹出confirm对话框
/// </summary>
/// <param name="str_Message"> 提示信息,例子："您是否确认删除!" </param>
/// <param name="btn"> 隐藏Botton按钮Id值,比如：btn_Flow </param>
/// <param name="page"> Page类 </param>
public void Confirm( string str_Message, string btn,Page page)
{
page.RegisterStartupScript( "" , " <script> if (confirm(' " + str_Message + " ')==true){document.forms(0). " + btn + " .click();}</script> " );
}

38.重载确认对话框，点击确定触发一个隐藏按钮事件，点击取消触发一个隐藏按钮事件

/// <summary>
/// 服务器端弹出confirm对话框,询问用户准备转向那些操作，包括“确定”和“取消”时的操作
/// </summary>
/// <param name="str_Message"> 提示信息，比如："成功增加数据,单击\"确定\"按钮填写流程,单击\"取消\"修改数据" < /param>
/// <param name="btn_Redirect_Flow"> "确定"按钮id值 </param>
/// <param name="btn_Redirect_Self"> "取消"按钮id值 </param>
/// <param name="page"> Page类 </param>
public void Confirm( string str_Message, string btn_Redirect_Flow, string btn_Redirect_Self,Page page)
{
page.RegisterStartupScript( "" , " <script> if (confirm(' " + str_Message + " ')==true){document.forms(0). " + btn_Redirect_Flow + " .click();}else{document.forms(0). " + btn_Redirect_Self + " .click();}</script> " );
}

39.获得焦点

/// <summary>
/// 使控件获得焦点
/// </summary>
/// <param name="str_Ctl_Name"> 获得焦点控件Id值,比如：txt_Name </param>
/// <param name="page"> Page类 </param>
public void GetFocus( string str_Ctl_Name,Page page)
{
page.RegisterStartupScript( "" , " <script>document.forms(0). " + str_Ctl_Name + " .focus(); document.forms(0). " + str_Ctl_Name + " .select();</script> " );
}

40.子窗体返回主窗体

/// <summary>
/// 名称：redirect
/// 功能：子窗体返回主窗体
/// 参数：url
/// 返回值：空
/// </summary>
public void redirect( string url,Page page)
{
if ( Session[ " IfDefault " ] != ( object ) " Default " )
{
page.RegisterStartupScript( "" , " <script>window.top.document.location.href=' " + url + " ';</script> " );
}
}

41.判断是否为数字

/// <summary>
/// 名称：IsNumberic
/// 功能：判断输入的是否是数字
/// 参数：string oText：源文本
/// 返回值：bool true:是 false:否
/// </summary>
public bool IsNumberic( string oText)
{
try
{
int var1 = Convert.ToInt32 (oText);
return true ;
}
catch
{
return false ;
}
}

//获得字符串实际长度（包括中文字符）
// 获得字符串oString的实际长度
public int StringLength( string oString)
{
byte [] strArray = System.Text .Encoding.Default .GetBytes (oString);
int res = strArray.Length ;
return res;
}

42.将回车转换为TAB

// 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 " );
}

43.datagrid分页中如果删除时出现超出索引

public void jumppage(System.Web.UI.WebControls.DataGrid dg)
{
int int_PageLess; // 定义页面跳转的页数
// 如果当前页是最后一页
if (dg.CurrentPageIndex == dg.PageCount - 1 )
{
// 如果就只有一页
if (dg.CurrentPageIndex == 0 )
{
// 删除后页面停在当前页
dg.CurrentPageIndex = dg.PageCount - 1 ;
}
else
{
// 如果最后一页只有一条记录
if ((dg.Items.Count % dg.PageSize == 1 ) || dg.PageSize == 1 )
{
// 把最后一页最后一条记录删除后，页面应跳转到前一页
int_PageLess = 2 ;
}
else // 如果最后一页的记录数大于1，那么在最后一页删除记录后仍然停在当前页
{
int_PageLess = 1 ;
}
dg.CurrentPageIndex = dg.PageCount - int_PageLess;
}
}
}

转载于:https://www.cnblogs.com/hcbin/archive/2010/04/12/1709089.html