ASP.NET中实现jQuery Validation-Engine的Ajax验证实现代码

jquery.validationEngine.js //插件主JS文件
jquery.validationEngine-cn.js //验证规则JS文件
validationEngine.jquery.css //样式表文件

$("#formID").validationEngine({
inlineValidation: false, //在这里修改
success : false,
alidationEventTriggers:"keyup blur", //这里增加了个keyup，也就是键盘按键起来就触发验证
promptPosition: "topRight", // 有5种模式 topLeft, topRight, bottomLeft, centerRight, bottomRight
failure : function() { callFailFunction() }
})

官方jquery.validationEngine.js 文件中的关键代码
$.ajax({
type: options.ajaxFormValidationMethod,
url: rule.url,
cache: false,
dataType: "json",
data: "fieldId=" + field.attr("id") + "&fieldValue=" + field.val() + "&extraData=" + extraData + "&" + extraDataDynamic,
field: field,
rule: rule,
methods: methods,
options: options,
beforeSend: function() {
// build the loading prompt
var loadingText = rule.alertTextLoad;
if (loadingText)
methods._showPrompt(field, loadingText, "load", true, options);
},
error: function(data, transport) {
methods._ajaxError(data, transport);
},
success: function(json) {
// asynchronously called on success, data is the json answer from the server
var errorFieldId = json[0];
//var errorField = $($("#" + errorFieldId)[0]);
var errorField = $($("input[id='" + errorFieldId +"']")[0]);
// make sure we found the element
if (errorField.length == 1) {
var status = json[1];
// read the optional msg from the server
var msg = json[2];
if (!status) {
// Houston we got a problem - display an red prompt
options.ajaxValidCache[errorFieldId] = false;
options.isError = true;
// resolve the msg prompt
if(msg) {
if (options.allrules[msg]) {
var txt = options.allrules[msg].alertText;
if (txt)
msg = txt;
}
}
else
msg = rule.alertText;
methods._showPrompt(errorField, msg, "", true, options);
} else {
if (options.ajaxValidCache[errorFieldId] !== undefined)
options.ajaxValidCache[errorFieldId] = true;
// resolves the msg prompt
if(msg) {
if (options.allrules[msg]) {
var txt = options.allrules[msg].alertTextOk;
if (txt)
msg = txt;
}
}
else
msg = rule.alertTextOk;
// see if we should display a green prompt
if (msg)
methods._showPrompt(errorField, msg, "pass", true, options);
else
methods._closePrompt(errorField);
}
}
errorField.trigger("jqv.field.result", [errorField, options.isError, msg]);
}
});

public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
HttpContext _content = HttpContext.Current;
string validateId = _content.Request["fieldId"];
string validateValue = _content.Request["fieldValue"];
string validateError = _content.Request["extraData"];
string str;
if (validateValue == "abc")
str = "{\"jsonValidateReturn\":[\"" + validateId + "\",\"" + validateError + "\",true]}";
else
str = "{\"jsonValidateReturn\":[\"" + validateId + "\",\"" + validateError + "\",false]}";
context.Response.Write(str);
}

演示页面
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FormValidation.aspx.cs" Inherits="DemoWeb.FormValidation" %>

jQuery - Validation-Engine - Ajax验证

Ajax：

Ajax：

Ajax：

string str;
if (validateValue == "abc")
str = "{\"jsonValidateReturn\":[\"" + validateId + "\",\"" + validateError + "\",true]}";
else
str = "{\"jsonValidateReturn\":[\"" + validateId + "\",\"" + validateError + "\",false]}";
//if (validateValue == "abc")
// str = "{'jsonValidateReturn':['" + validateId + "','" + validateError + "',true]}";
//else
// str = "{'jsonValidateReturn\":['" + validateId + "','" + validateError + "',false]}";

// 异步调用成功，数据是从服务器的JSON答案
// 改动地方,原来jvar errorFieldId =json[0] 在asp.Net中是获取不到数据的
// 改成下面的方式，注意jsonValidateReturn这里名称定死了，在AJAX后台返回数据时必须和jsonValidateReturn一致
// {"jsonValidateReturn":["validateId","validateError","true"]}
var errorFieldId = json.jsonValidateReturn[0]; //改动的地方

//var errorField = $($("#" + errorFieldId)[0]);
var errorField = $($("input[id='" + errorFieldId +"']")[0]);

// 确保我们找到元素
if (errorField.length == 1) {
var status = json.jsonValidateReturn[2]; //改动的地方
// 从服务器读取的可选MSG
var msg = json.jsonValidateReturn[1]; //改动的地方
if (!status) {
// Houston，我们有一个问题 - 显示一个红色的提示
options.ajaxValidCache[errorFieldId] = false;
options.isError = true;

// --- CUSTOM RULES -- Those are specific to the demos, they can be removed or changed to your likings
"ajaxUsers": {
"url": "AjaxBackstage/AjaxValidation.ashx", // "validate.action", "validate.action"ajax验证用户名，会post如下参数：validateError ajaxUser；validateId user；validateValue cccc
"alertTextOk": "* 帐号可以使用.",
"alertTextLoad": "* 检查中, 请稍后...",
"alertText": "* 帐号不能使用."
},
"ajaxUserCall": {
"url": "ajaxValidateFieldUser",
// you may want to pass extra data on the ajax call
//"extraData": "name=eric",
"alertText": "* 此名称已被其他人使用",
"alertTextLoad": "* 正在确认名称是否有其他人使用，请稍等。"
},