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);
}
这里注意了：在AJAX验证的时候，会POST三个核心参数到后台，fieldId、fieldValue、extraData，当然还可自定义其它的参数传递过来
5.2 第二步，创建一个aspx页面仿照Validation-Engine的JS写个AJAX请求，代码如下：
复制代码 代码如下:
演示页面
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FormValidation.aspx.cs" Inherits="DemoWeb.FormValidation" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>jQuery表单验证 - Validation-Engine</title>
<link href="https://www.jb51.net/Scripts/Validation-Engine/css/validationEngine.jquery.css" type="text/css" />
<script src="https://www.jb51.net/Scripts/jquery-1.4.1-vsdoc.js" type="text/javascript"></script>
<script src="https://www.jb51.net/Scripts/Validation-Engine/js/jquery.validationEngine.js" type="text/javascript"></script>
<script src="https://www.jb51.net/Scripts/Validation-Engine/js/languages/jquery.validationEngine-zh_CN.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#formID").validationEngine({
ajaxFormValidation: true
});
$.ajax({
type: "get",
url: "AjaxBackstage/AjaxValidation.ashx",
cache: false,
data: { "fieldId": "Text4", "fieldValue": "haha", "extraData": "nowtime2012" },
dataType: "json",
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert("错误！XMLHttpRequest.status=" + XMLHttpRequest.status + ",XMLHttpRequest.readyState=" + XMLHttpRequest.readyState + ",textStatus=" + textStatus);
},
success: function (json) {
alert("你好，成功了！"+json.jsonValidateReturn[0] + ", " + json.jsonValidateReturn[1] + "," + json.jsonValidateReturn[2]);
}
});
});
</script>
</head>
<body>
<form runat="server">
<h2>
jQuery - Validation-Engine - Ajax验证
</h2>
<br />
<p>
Ajax：<input type="text" />
</p>
<p>
Ajax：<input type="text"/>
</p>
<p>
Ajax：<input type="text"/>
</p>
</form>
</body>
</html>
url: "AjaxBackstage/AjaxValidation.ashx" 这里指向刚才创建的一般处理程序
调试结果返回的是正确的json格式的数据会执行 succes下面的函数，否则执行error下面的函数，下面看一下效果
复制代码 代码如下:
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]}";
数据请求成功：