jquery.validate.js plug-in usage experience record_jquery

When I was working on a project recently, I needed to use the jQuery.validate.js plug-in, so I recorded some of my experience at work for future study.

[Examples are as follows]

1. Front page

<form id="form1" method="post"> 
用户名：<input type="text" id="UserName" name="UserName" /><!--<span id="name_error"></span>--> 
<br /> 
密 码：<input type="password" id="Password" name="Password" /> 
<br /> 
<input type="submit" id="btnRegister" name="btnRegister" value="注册" /> 
<input type="button" id="btnCancel" name="btnCancel" value="取消" /> 
</form>

2.Javascript

<script type="text/javascript"> 
//添加自定义验证 
jQuery.validator.addMethod("checkPWD", function (value, element) { 
var flag = false; 
//flag = chkpwd($("#pwd")); //自定义验证密码逻辑 
return this.optional(element) || flag; 
}); 
$(function () { 
$("#form1").validate({ 
rules: { 
UserName: { 
required: true, 
//emote: function () { //验证用户名是否存在是否存在 方法一 
// $.ajax({ 
// type: 'POST', 
// url: "Handler/Handler1.ashx", 
// data: { name: $("#UserName").val() }, 
// async: false, 
// success: function (data) { 
// $("#name_error").html(data); 
// } 
// }); 
//} 
remote: { //验证用户名是否存在是否存在 方法二 
type: "POST", 
url: "Handler/Handler1.ashx", //后台处理程序 
dataType: "json", //接受数据格式 
data: { //要传递的参数 
action: function () { return "CheckName" }, 
name: function () { return $("#UserName").val(); }, 
param1: function () { return "自定义参数1"; } 
} 
} 
}, 
Password: { 
required: true, 
checkPWD: true //自定义验证，若想不用自定义验证，把 true 改成 false 即可。 
} 
}, 
messages: { 
"UserName": { 
required: "<span>用户名不能为空.</span>", 
remote: "<span>该会员名已存在！</span>" 
}, 
"Password": { 
required: "<span>密码不能为空.</span>", 
checkPWD: "<span>密码不符合自定义规则。。。</span>" 
} 
} 
}); 
}) 
</script>

3. Background processing program

public void ProcessRequest(HttpContext context) 
{ 
context.Response.ContentType = "text/plain"; 
string action = context.Request["action"]; 
//获取用户名和自定义参数 
string name = context.Request["name"]; 
string param1 = context.Request["param1"]; 
if (!string.IsNullOrEmpty(name)) 
{ 
//模拟查询数据库，如果用户输入的是 admin ，则提示该账户已存在，返回 false 
if (name.Equals("admin")) 
{ 
context.Response.Write("false"); 
} 
else 
{ 
context.Response.Write("true"); 
} 
} 
}

4. Running results

4.1 An error occurs when the user does not enter data:

4.2 Error when user enters wrong information: