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 + "’)");
}




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
"
);
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();
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
?

〖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>
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");
}

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 + "’)");
}




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
"
);
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();
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
?

〖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>
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");
}
本文汇总了ASP.NET开发中常用的技巧,包括窗口参数传递、按钮对话框添加、表格记录删除及警告等操作,同时还介绍了如何实现表格点击变色、日期格式化处理、错误信息获取与处理等功能。
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