zoukankan
html css js c++ java
ASP.NET程序中常用代码汇总(二)
31
. 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();
32
.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%
33
.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
"
>
<
!--
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
"
);
}
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;
}
}
}
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原文地址:https://www.cnblogs.com/wantingqiang/p/1402579.html
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