一、简单应用实例:
1.用class样式进行验证,用法简单,但不能自定义错误信息,只能修改jquery-1.4.1.min.js中的内置消息,也不支持高级验证规则。
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<
script
type
=
"text/javascript"
language
=
"javascript"
src
=
"http://www.jb51.net/Scripts/jquery-1.4.1.min.js"
></
script
>
<
script
type
=
"text/javascript"
language
=
"javascript"
src
=
"http://www.jb51.net/Scripts/jquery.validate.min.js"
></
script
>
<
h2
>ValidateTest</
h2
>
<
form
id
=
"loginForm"
action
=
"post"
>
<
table
border
=
"0"
cellpadding
=
"0"
cellspacing
=
"0"
>
<
tr
>
<
td
>
<
input
type
=
"text"
id
=
"UserEmail"
class
=
"required email"
/></
td
>
</
tr
>
<
tr
>
<
td
>
<
input
type
=
"password"
id
=
"Password"
class
=
"required"
/></
td
>
</
tr
>
<
tr
>
<
td
>
<
input
type
=
"submit"
value
=
"submit"
onclick
=
"checkInput();"
/>
</
td
>
</
tr
>
</
table
>
</
form
>
<
script
language
=
"javascript"
type
=
"text/javascript"
>
function checkInput() {
if ($("#loginForm").valid()) {
return true;
}
return false;
}
</
script
>
|
当然,如果不希望使用onclick事件进行提交验证,也可以在页面加载时加上jQuery的监控,代码如下:
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$(document).ready(
function
() {
jQuery(
"#loginForm"
).validate();
});
|
这时就不需要在提交按钮上加 onclick="checkInput();"这个事件了。
2.使用Json字符串验证,使用该规则验证,必须额外引入jquery.metadata.pack.js文件
修改上面的两个INPUT如下:
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<
input
type
=
"text"
id
=
"UserEmail"
class
=
"{validate:{ required:true,email:true }}"
/>
<
input
type
=
"password"
id
=
"Password"
class
=
"{validate:{required:true,minlength:6,messages:{required:'请输入密码 ',minlength:'密码至少6位'}}}"
/>
|
可以看到,我们已经可以自定义错误消息了。
另外必须在页面中加上以下代码:
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$(document).ready(
function
() {
$(
"#loginForm"
).validate({
meta:
"validate"
});
});
|
二、验证规则的应用
1.使用class验证的规则:
在class中可以使用:required,email,number,url,date,dateISO,dateDE,digits,creditcard,phoneUS
可以增加属性:minlength,maxlength,min,max,accept,remote(注:请检查是否返回是bool还是xml),equalTo='#password'
没有找到使用办法的内置方法:required(dependency-expression),required(dependency-callback),range,rangelength
2.使用Json对象验证的规则:
在class中进行如下定义:class=“{validate:{required:true,minlength:6,messages:{required:'请输入密码',minlength:'密码太短啦至少6位'}}}”
我们仍可进行以下定义:number:true, email:true, url:true, date:true, dateISO:true, dateDE:true, digits:true, creditcard:true, phoneUS:true
min:3, max:10, minlength:3, maxlength:10,required: '#other:checked'【此处表达式函数为required(dependency-expression)】
相比使用class来说,我们已经可以使用range方法了,可定义为数字range:[3,10],字符串长度rangelength:[3,10],remote:url,accept:'.csv|.jpg|.doc|.docx', equalTo:'#Password'
没有找到使用方法的内置方法:required(dependency-callback)
三、高级验证方法
在前面说到的简单验证中,使用起来非常简单,有些傻瓜式的味道,但毕竟有些内置规则不能使用。但要想做到灵活运用,还是需要通过JS编码来完成。这样不但所有的内置规则可以使用,而且我们还可以自定义验证规则。以下实例我从易到难逐个列出:
1.编写JS的简单方法
仍以登录验证为例:
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|
<
script
type
=
"text/javascript"
language
=
"javascript"
src
=
"http://www.jb51.net/Scripts/jquery-1.4.1.min.js"
></
script
>
<
script
type
=
"text/javascript"
language
=
"javascript"
src
=
"http://www.jb51.net/Scripts/jquery.validate.min.js"
></
script
>
<
h2
>Validate-High</
h2
>
<
form
action
=
""
id
=
"loginForm"
method
=
"post"
>
<
table
border
=
"0"
cellpadding
=
"0"
cellspacing
=
"0"
>
<
tr
>
<
td
>
<
input
type
=
"text"
id
=
"UserEmail"
/>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
input
type
=
"password"
id
=
"Password"
/>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
input
type
=
"submit"
value
=
"submit"
/>
</
td
>
</
tr
>
</
table
>
</
form
>
<
script
language
=
"javascript"
type
=
"text/javascript"
>
$(document).ready(function () {
var validateOpts = {
rules: {
UserEmail: {
required: true,
email: true
},
Password: {
required: true
}
},
messages: {
UserEmail: {
required: "请输入邮箱地址",
email: "邮箱地址不正确"
},
Password: {
required: "请输入密码"
}
}
};
$("#loginForm").validate(validateOpts);
});
</
script
>
|
我们只需设置validate的参数即可。
2.equalTo的使用,一般在注册时会用到
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<
script
type
=
"text/javascript"
language
=
"javascript"
src
=
"http://www.jb51.net/Scripts/jquery-1.4.1.min.js"
></
script
>
<
script
type
=
"text/javascript"
language
=
"javascript"
src
=
"http://www.jb51.net/Scripts/jquery.validate.min.js"
></
script
>
<
h2
>ValidateHigh</
h2
>
<
form
action
=
""
id
=
"loginForm"
method
=
"post"
>
<
table
border
=
"0"
cellpadding
=
"0"
cellspacing
=
"0"
>
<
tr
>
<
td
>
<
input
type
=
"text"
id
=
"UserEmail"
/>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
input
type
=
"password"
id
=
"Password"
/>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
input
type
=
"password"
id
=
"RePassword"
/>
</
td
>
</
tr
>
<
tr
>
<
td
>
<
input
type
=
"submit"
value
=
"submit"
/>
</
td
>
</
tr
>
</
table
>
</
form
>
<
script
language
=
"javascript"
type
=
"text/javascript"
>
$(document).ready(function () {
var validateOpts = {
rules: {
UserEmail: {
required: true,
email: true
},
Password: {
required: true
},
RePassword: {
equalTo: "#Password"
}
},
messages: {
UserEmail: {
required: "请输入邮箱地址",
email: "邮箱地址不正确"
},
Password: {
required: "请输入密码"
},
RePassword: {
equalTo: "两次输入密码必须相同"
}
}
};
$("#loginForm").validate(validateOpts);
});
</
script
>
|
3.required(dependency-callback)的使用,绿色字体。
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var
validateOpts = {
rules: {
age: {
required:
true
,
min: 3
},
parent: {
required:
function
(element) {
return
$(
"#age"
).val() < 13;
}
}
}
}
|
4.自定义规则,使用addMethod方法,如下:
//方法接收三个参数(value,element,param)
//value是元素的值,element是元素本身 param是参数,我们可以用addMethod来添加除built-in Validation methods之外的验证方法
//比如有一个字段,只能输一个字母,范围是a-f,写法如下
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$.validator.addMethod(
"af"
,
function
(value, element, params) {
if
(value.length >1) {
returnfalse;
}
if
(value >=params[0] && value <=params[1]) {
returntrue;
}
else
{
returnfalse;
}
},
"必须是一个字母,且a-f"
);
|
这样我们就可以在rules中加上这个规则,如下
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var
validateOpts = {
rules: {
selectorId: {
af: [
"a"
,
"f"
]
//如果只有一个参数,直接写,如果af:"a",那么a就是这个唯一的参数,如果多个参数,用在[]里,用逗号分开
}
}
}
|
另外,经过试验,在Json方式中,我们可以使用af:['a','f'],这个验证可以起作用,在class方式中,在某个元素上增加af='af',验证也可以起到作用。
5.ajax验证,使用remote
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remote: {
url:
"CheckEmail"
,
type:
"post"
,
dataType:
"json"
}
|
如果我们验证的方法是返回Boolean类型,这个方法是没有问题的。但很多时候我们可能返回的信息会更多,或者返回其它类型,这时我们可以重新定义一个新的remote方法,示例如下(返回一个Json对象):
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$.validator.addMethod(
"jsonremome"
,
function
(value, element, param) {
if
(
this
.optional(element))
return
"dependency-mismatch"
;
var
previous =
this
.previousValue(element);
if
(!
this
.settings.messages[element.name])
this
.settings.messages[element.name] = {};
previous.originalMessage =
this
.settings.messages[element.name].remote;
this
.settings.messages[element.name].remote = previous.message;
param =
typeof
param ==
"string"
&& { url: param} || param;
if
(previous.old !== value) {
previous.old = value;
var
validator =
this
;
this
.startRequest(element);
var
data = {};
data[element.name] = value;
$.ajax($.extend(
true
, {
url: param,
mode:
"abort"
,
port:
"validate"
+ element.name,
dataType:
"json"
,
data: data,
success:
function
(response) {
validator.settings.messages[element.name].remote = previous.originalMessage;
//var valid = response === true;
var
valid = response.Result ===
true
;
if
(valid) {
var
submitted = validator.formSubmitted;
validator.prepareElement(element);
validator.formSubmitted = submitted;
validator.successList.push(element);
validator.showErrors();
}
else
{
var
errors = {};
//var message = (response.Message || validator.defaultMessage(element, "jsonremote"));
var
message = response.Message ||
"远程验证未通过"
;
errors[element.name] = $.isFunction(message) ? message(value) : message;
validator.showErrors(errors);
}
previous.valid = valid;
validator.stopRequest(element, valid);
}
}, param));
return
"pending"
;
} elseif (
this
.pending[element.name]) {
return
"pending"
;
}
return
previous.valid;
});
|
服务器端方法如下(MVC中):
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public
JsonResult CheckEmail(
string
UserEmail)
{
returnnew JsonResult { Data =
new
{ Result =
false
, Message=
"Please change the filed"
} };
}
|
我们就可以使用jsonremote来取代remote方法了。当然,remote方法依然可以使用。
6.错误显示规则
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var
validateOpts = {
wrapper:
"div"
,
// default has no wrapper
errorClass:
"invalid"
,
// the default value is error
errorElement:
"em"
,
// default value is lable
errorLabelContainer:
"#messageBox"
,
// to gather all the error messages
}
|
以上就是本文的全部内容,希望能给大家一个参考,也希望大家多多支持脚本之家。
来源:http://www.jb51.net/article/85701.htm