常用网站后台与前台表单的有效性简单验证(不用验证控件，怕忘)
这个方法只是简单的验证 一般情况下可以使用
如果实现较为复杂的 比如输入框失去焦点就开始判断用户名是否存在或者其他条件 请参照另外一篇：
http://www.cnblogs.com/luqingsong/archive/2011/01/14/1935691.html
网站后台验证（不用验证控件）
代码
//
----------------------------------------------------验证开始
//
验证输入是否完整
if
(answer.Length
==
0
||
email.Length
==
0
||
name.Length
==
0
||
pwd.Length
==
0
||
qrpwd.Length
==
0
||
question.Length
==
0
)
{
Response.Write(
"
<script language='JavaScript'>alert('输入不完整')</script>
"
);
return
;
}
//
验证密码与确认密码是否一致
if
(pwd
!=
qrpwd)
{
Response.Write(
"
<script language='JavaScript'>alert('密码与确认密码不一致')</script>
"
);
return
;
}
//
验证密码
if
(
!
Regex.IsMatch(pwd,
"
^[a-zA-Z0-9]{6,20}$
"
))
{
Response.Write(
"
<script language='JavaScript'>alert(' 密码长度必须大于6个字符小于20个字符，只能为英语字、数字，例如：snsn2003等')</script>
"
);
return
;
}
//
验证电子邮件
if
(
!
Regex.IsMatch(email,
@"
\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
"
))
{
Response.Write(
"
<script language='JavaScript'>alert('请输入有效的邮件地址')</script>
"
);
return
;
}
//
验证用户名是否存在
if
(
new
xh.shop.DAL.user().Exists(name))
{
Response.Write(
"
<script language='JavaScript'>alert('用户名已经存在')</script>
"
);
return
;
}
//
--------------------------------------------------------验证结束
前台javascript验证：
第一步:在提交按钮的前台代码中加入
OnClientClick="return checkform()" 如果为真则执行 如果为假就不执行提交
如
<
asp:Button
ID
="butsubmit"
runat
="server"
OnClientClick
="return checkform()"
Text
="提交"
/>
第二步：在head部分写入：(如果是根据母版则在母版页的head部分写)
代码
<
script type
=
"
text/javascript
"
>
function
checkform() {
var
name
=
document.getElementById(
'
<%=txtname.ClientID %>
'
).value;
var
email
=
document.getElementById(
'
<%=txtemail.ClientID %>
'
).value;
var
pwd
=
document.getElementById(
'
<%=txtpwd.ClientID %>
'
).value;
var
qrpwd
=
document.getElementById(
'
<%=txtqrpwd.ClientID %>
'
).value;
var
question
=
document.getElementById(
'
<%=txtquestion.ClientID %>
'
).value;
var
answer
=
document.getElementById(
'
<%=txtanswer.ClientID %>
'
).value;
//
验证输入是否完整
if
(answer.length
==
0
||
email.length
==
0
||
name.length
==
0
||
pwd.length
==
0
||
qrpwd.length
==
0
||
question.length
==
0
)
{
alert(
"
输入不完整
"
);
return
false
;
}
//
验证密码与确认密码是否一致
if
(pwd
!=
qrpwd) {
alert(
"
密码与确认密码不一致
"
);
return
false
;
}
//
验证密码 这里的正则表达式的判断方法跟c#不一样 请注意:/正则表达式 /g g表示全部查找
var
reg
=
/
^[a-zA-Z0-9]{6,20}$
/
g;
if
(
!
reg.test(pwd))
{
alert(
"
密码长度必须大于6个字符小于20个字符，只能为英语字、数字，例如：snsn2003等
"
);
return
false
;
}
//
验证电子邮件
reg
=
/
\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
/
g;
if
(
!
reg.test(email))
{
alert(
"
请输入有效的邮件地址
"
);
return
false
;
}
//
如果都正确 则返回真
return
true
;
}
<
/
script>
如果前台用jquery实现 代码如下:
代码
<
script src
=
"
js/jquery-1.4.2.js
"
type
=
"
text/javascript
"
><
/
script>
<
script type
=
"
text/javascript
"
>
function
checkform() {
var
name
=
$.trim($(
'
#<%=txtname.ClientID %>
'
).val()) ;
var
email
=
$.trim($(
'
#<%=txtemail.ClientID %>
'
).val()) ;
var
pwd
=
$.trim($(
'
#<%=txtpwd.ClientID %>
'
).val()) ;
var
qrpwd
=
$.trim($(
'
#<%=txtqrpwd.ClientID %>
'
).val()) ;
var
question
=
$.trim($(
'
#<%=txtquestion.ClientID %>
'
).val()) ;
var
answer
=
$.trim($(
'
#<%=txtanswer.ClientID %>
'
).val());
//
验证输入是否完整
if
(answer.length
==
0
||
email.length
==
0
||
name.length
==
0
||
pwd.length
==
0
||
qrpwd.length
==
0
||
question.length
==
0
)
{
alert(
"
输入不完整
"
);
return
false
;
}
//
验证密码与确认密码是否一致
if
(pwd
!=
qrpwd) {
alert(
"
密码与确认密码不一致
"
);
return
false
;
}
//
验证密码 这里的正则表达式的判断方法跟c#不一样 请注意:/正则表达式 /g g表示全部查找
var
reg
=
/
^[a-zA-Z0-9]{6,20}$
/
g;
if
(
!
reg.test(pwd))
{
alert(
"
密码长度必须大于6个字符小于20个字符，只能为英语字、数字，例如：snsn2003等
"
);
return
false
;
}
//
验证电子邮件
reg
=
/
\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
/
g;
if
(
!
reg.test(email))
{
alert(
"
请输入有效的邮件地址
"
);
return
false
;
}
//
如果都正确 则返回真
return
true
;
}
<
/
script>
附录全部代码以做参考:
前台
代码
<%
@ Page Title
=
""
Language
=
"
C#
"
MasterPageFile
=
"
~/topfoot.Master
"
AutoEventWireup
=
"
true
"
CodeBehind
=
"
reg2.aspx.cs
"
Inherits
=
"
xh.shop.web.reg2
"
%>
<
asp:Content
ID
="Content1"
ContentPlaceHolderID
="head"
runat
="server"
>
<
script
src
="js/jquery-1.4.2.js"
type
="text/javascript"
></
script
>
<
script
type
="text/javascript"
>
function
checkform() {
var
name
=
$.trim($(
'
#<%=txtname.ClientID %>
'
).val()) ;
var
email
=
$.trim($(
'
#<%=txtemail.ClientID %>
'
).val()) ;
var
pwd
=
$.trim($(
'
#<%=txtpwd.ClientID %>
'
).val()) ;
var
qrpwd
=
$.trim($(
'
#<%=txtqrpwd.ClientID %>
'
).val()) ;
var
question
=
$.trim($(
'
#<%=txtquestion.ClientID %>
'
).val()) ;
var
answer
=
$.trim($(
'
#<%=txtanswer.ClientID %>
'
).val());
//
验证输入是否完整
if
(answer.length
==
0
||
email.length
==
0
||
name.length
==
0
||
pwd.length
==
0
||
qrpwd.length
==
0
||
question.length
==
0
)
{
alert(
"
输入不完整
"
);
return
false
;
}
//
验证密码与确认密码是否一致
if
(pwd
!=
qrpwd) {
alert(
"
密码与确认密码不一致
"
);
return
false
;
}
//
验证密码 这里的正则表达式的判断方法跟c#不一样 请注意:/正则表达式 /g g表示全部查找
var
reg
=
/
^[a-zA-Z0-9]{6,20}$
/
g;
if
(
!
reg.test(pwd))
{
alert(
"
密码长度必须大于6个字符小于20个字符，只能为英语字、数字，例如：snsn2003等
"
);
return
false
;
}
//
验证电子邮件
reg
=
/
\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
/
g;
if
(
!
reg.test(email))
{
alert(
"
请输入有效的邮件地址
"
);
return
false
;
}
//
如果都正确 则返回真
return
true
;
}
</
script
>
</
asp:Content
>
<
asp:Content
ID
="Content2"
ContentPlaceHolderID
="ContentPlaceHolder1"
runat
="server"
>
<
table
width
="789"
border
="1"
>
<
tr
>
<
td
align
="left"
valign
="top"
>
<
table
width
="100%"
border
="0"
>
<
tr
>
<
td
height
="35"
bgcolor
="#CCCCCC"
style
="font-weight: bold; padding-left: 10px;"
>
<
img
src
="images/o.gif"
width
="9"
height
="9"
/>
新用户注册
</
td
>
</
tr
>
<
tr
>
<
td
align
="left"
>
<
table
align
="center"
border
="0"
cellpadding
="1"
cellspacing
="1"
width
="70%"
>
<
tr
>
<
td
>
<
span
class
="pad"
>
用 户 名：
<
asp:TextBox
ID
="txtname"
runat
="server"
></
asp:TextBox
>
*
<
br
/>
请填写您用来登录的用户名。
</
span
>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
span
class
="pad"
>
电子邮件：
<
asp:TextBox
ID
="txtemail"
runat
="server"
></
asp:TextBox
>
*
<
br
/>
请填写您有效的邮件地址，以便于我们为您提供有效的服务。
</
span
>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
span
class
="pad"
>
密 码：
<
asp:TextBox
ID
="txtpwd"
TextMode
="Password"
runat
="server"
></
asp:TextBox
>
*
<
br
/>
长度必须大于6个字符小于20个字符，只能为英语字、数字，例如：snsn2003等。
</
span
>
</
td
>
</
tr
>
<
tr
>
<
td
height
="35"
>
<
span
class
="pad"
>
确认密码：
<
asp:TextBox
ID
="txtqrpwd"
TextMode
="Password"
runat
="server"
></
asp:TextBox
>
*
<
br
/>
请将输入的密码再次输入，以免设置密码出错。
</
span
>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
span
class
="pad"
>
密码提问：
<
asp:TextBox
ID
="txtquestion"
runat
="server"
></
asp:TextBox
>
*(用于密码遗忘时使用)
</
span
>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
span
class
="pad"
>
密码答案：
<
asp:TextBox
ID
="txtanswer"
runat
="server"
></
asp:TextBox
>
*(密码遗忘时将验证此答案)
</
span
>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
span
class
="pad"
>
<
asp:Button
ID
="butsubmit"
runat
="server"
OnClientClick
="return checkform()"
Text
="提交"
OnClick
="butcz"
/>
<
asp:Button
ID
="Button5"
runat
="server"
Text
="重置"
OnClick
="Button5_Click"
/>
<
asp:Button
ID
="Button6"
runat
="server"
Text
="返回"
OnClick
="Button6_Click"
/>
(带*为必填项)
</
span
>
</
td
>
</
tr
>
</
table
>
</
td
>
</
tr
>
</
table
>
</
td
>
</
tr
>
</
table
>
</
asp:Content
>
后台
代码
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Text.RegularExpressions;
namespace
xh.shop.web
{
public
partial
class
reg2 : System.Web.UI.Page
{
protected
void
Page_Load(
object
sender, EventArgs e)
{
}
protected
void
Button4_Click(
object
sender, EventArgs e)
{
}
//
重置
protected
void
Button5_Click(
object
sender, EventArgs e)
{
txtanswer.Text
=
""
;
txtemail.Text
=
""
;
txtname.Text
=
""
;
txtpwd.Text
=
""
;
txtqrpwd.Text
=
""
;
txtquestion.Text
=
""
;
}
//
返回
protected
void
Button6_Click(
object
sender, EventArgs e)
{
Response.Redirect(
"
index.aspx
"
);
}
//
注册
protected
void
butcz(
object
sender, EventArgs e)
{
string
answer
=
txtanswer.Text.Trim();
string
email
=
txtemail.Text.Trim();
string
name
=
txtname.Text.Trim();
string
pwd
=
txtpwd.Text.Trim();
string
qrpwd
=
txtqrpwd.Text.Trim();
string
question
=
txtquestion.Text.Trim();
//
----------------------------------------------------验证开始
//
验证输入是否完整
if
(answer.Length
==
0
||
email.Length
==
0
||
name.Length
==
0
||
pwd.Length
==
0
||
qrpwd.Length
==
0
||
question.Length
==
0
)
{
Response.Write(
"
<script language='JavaScript'>alert('输入不完整')</script>
"
);
return
;
}
//
验证密码与确认密码是否一致
if
(pwd
!=
qrpwd)
{
Response.Write(
"
<script language='JavaScript'>alert('密码与确认密码不一致')</script>
"
);
return
;
}
//
验证密码
if
(
!
Regex.IsMatch(pwd,
"
^[a-zA-Z0-9]{6,20}$
"
))
{
Response.Write(
"
<script language='JavaScript'>alert(' 密码长度必须大于6个字符小于20个字符，只能为英语字、数字，例如：snsn2003等')</script>
"
);
return
;
}
//
验证电子邮件
if
(
!
Regex.IsMatch(email,
@"
\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
"
))
{
Response.Write(
"
<script language='JavaScript'>alert('请输入有效的邮件地址')</script>
"
);
return
;
}
//
验证用户名是否存在
if
(
new
xh.shop.DAL.user().Exists(name))
{
Response.Write(
"
<script language='JavaScript'>alert('用户名已经存在')</script>
"
);
return
;
}
//
--------------------------------------------------------验证结束
int
res
=
new
xh.shop.DAL.user().Add(
new
xh.shop.Model.user() {
username
=
name,
createdate
=
DateTime.Now,
answer
=
answer,
email
=
email,
password
=
pwd,
question
=
question
});
if
(res
>
0
)
{
Response.Write(
"
<script language='JavaScript'>alert('添加成功')</script>
"
);
txtanswer.Text
=
""
;
txtemail.Text
=
""
;
txtname.Text
=
""
;
txtpwd.Text
=
""
;
txtqrpwd.Text
=
""
;
txtquestion.Text
=
""
;
}
else
{
Response.Write(
"
<script language='JavaScript'>alert('添加失败')</script>
"
);
return
;
}
}
}
}