asp.net程序中最常用的三十三种编程代码,为初学者多多积累经验,为高手们归纳总结,看了觉得很有价值~,大家不妨参考下!
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(
"
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}
"
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
// 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
"
/
>
最好将你的aspnetmenu升级到1.2版
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?
<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:
2007年02月01日
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:
1.1 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?’);");
}
}
}
1.2 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’;" ;
}
1.3 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();
//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;
}
}
1.4 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()
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");
}