为了改维 www.pingco.com的联动效果，费了半天劲。使用AjaxPro2.dll 注意点：
1. web.config 检查是否有：必须有Ajax接管httpHandlers
<httpHandlers>
<add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" />
</httpHandlers>
2.在。cs中注册AjaxPro
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
AjaxPro.Utility.RegisterTypeForAjax(typeof(_Default)); //注册ajaxPro,括号中的参数是当前的类名
if (!Page.IsPostBack)
{
//---------------------------------------------------------------------------
this.DropDownList1.DataSource = getMobileType();
this.DropDownList1.DataTextField = "MobileFactory";
this.DropDownList1.DataValueField = "MobileFactory";
this.DropDownList1.DataBind();
this.DropDownList1.Items.Insert(0, "-请选择手机品牌-");
this.DropDownList3.Items.Insert(0, "-请选择手机型号-");
this.DropDownList1.Attributes.Add("onchange", "mobileResult();");
}
}
/// <summary>
/// 获取手机类型
/// </summary>
/// <returns></returns>
public static DataTable getMobileType()
{
webcode.Data.SqlConn conn = new webcode.Data.SqlConn(System.Configuration.ConfigurationManager.AppSettings["ConnStr_Mobile"].ToString());
string cmdText = "select distinct(MobileFactory) from T***";
DataTable dt = conn.getDateTable(cmdText);
return dt;
}
/// <summary>
/// 获取手机型号
/// </summary>
/// <returns></returns>
//[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]//todo: 测试用
[AjaxPro.AjaxMethod]
public DataTable getMobileTypeNumber1(string MobileFactory)
{
string cmdText = "select distinct(MobileType) as MobileType, max(WapVersion) as WapVersion from T*** with(nolock) where MobileFactory='" + MobileFactory + "' group by MobileType order by MobileType desc";
webcode.Data.SqlConn conn = new webcode.Data.SqlConn(System.Configuration.ConfigurationManager.AppSettings["ConnStr_Mobile"].ToString());
DataTable dt = conn.getDateTable(cmdText);
return dt;
}
}
3.前台html代码：
<script language="javascript">
function mobileResult()
{
var m=document.getElementById("DropDownList1");
PingCoWeb._Default.getMobileTypeNumber1(m.value,mobileResult_callback);
}
function mobileResult_callback(response)
{
if (response.value != null)
{
document.getElementById("DropDownList3").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds != null)
{
for(var i=0; i<ds.Rows.length; i++)
{
var name=ds.Rows[i].MobileType;
var id=ds.Rows[i].WapVersion;
document.all("DropDownList3").options.add(new Option(name,id));
}
}
}
return
}
</script>
在此一定要注意：PingCoWeb._Default.getMobileTypeNumber1(m.value,mobileResult_callback);
不能写成：_Default.getMobileTypeNumber1(m.value,mobileResult_callback);
否则会报js错误："_Default” 未定义。 因为
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="PingCoWeb._Default"
EnableEventValidation="false" %>
如果在类文件中定义getMobileTypeNumber1（）函数，js中也要写上完整的类（加上命名空间。）
比如写到：PingCo.Origin.Web.Helper.AdvertiseDownLoad 下：
Code
namespace PingCo.Origin.Web.Helper
{
public class AdvertiseDownLoad
{
/// <summary>
/// 获取手机型号
/// </summary>
/// <returns></returns>
//[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]//todo: 测试用
[AjaxPro.AjaxMethod]
public DataTable getMobileTypeNumber1(string MobileFactory)
{
string cmdText = "select distinct(MobileType) as MobileType, max(WapVersion) as WapVersion from ** group by MobileType order by MobileType desc";
webcode.Data.SqlConn conn = new webcode.Data.SqlConn(System.Configuration.ConfigurationManager.AppSettings["ConnStr_Mobile"].ToString());
DataTable dt = conn.getDateTable(cmdText);
return dt;
}
}
}
cs中注册为：
AjaxPro.Utility.RegisterTypeForAjax(typeof(AdvertiseDownLoad)); //注册ajaxPro,括号中的参数是当前的类名
js中就的写：PingCo.Origin.Web.Helper.AdvertiseDownLoad.getMobileTypeNumber1(m.value,mobileResult_callback);
【附录】
| :【AjaxPro实现机制浅析一】AjaxPro内部为我们做什么工作？ |
|
|
正文:
先找个借口：好早就想分析下AjaxPro的代码实现机制了，一直苦于没时间，现在嘛总算有那么丁点了，开篇了，慢慢分析…… 以一个最简单的例子开始：
点击一个客户端button，触发一个javascript函数，执行一个只有一个string参数的服务端方法，返回一个处理过的string，处理方法是将传入的string变成“Hi”+string +“！”；够简单了，为了是不希望罗嗦的代码影响简单的分析；
所有代码如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="Test" %> <!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>无标题页</title>
<script type="text/javascript">
function doTest()
{
AJAXDemo.Examples.Test.TestMethod.GetTest("AjaxPro",doTest_callback);
} function doTest_callback(res) {
alert(res.value);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="Button1" type="button" onclick="doTest()" value="测试"/></div>
</form>
</body>
</html>
Test.aspx.cs
public partial class Test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Utility.RegisterTypeForAjax(typeof(AJAXDemo.Examples.Test.TestMethod));
}
}
AJAXDemo.Examples.Test
using System;
using AjaxPro; namespace AJAXDemo.Examples.Test
{
public class TestMethod
{
public TestMethod()
{} [AjaxMethod]
public string GetTest(string testText)
{
return "Hi," + testText + "!";
}
}
}
1.首先我们看AjaxPro在页面上给我们生成了什么？
Test[1]
<!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><title>
无标题页
</title>
<script type="text/javascript">
function doTest()
{
AJAXDemo.Examples.Test.TestMethod.GetTest("AjaxPro",doTest_callback);
} function doTest_callback(res) {
alert(res.value);
}
</script>
</head>
<body>
<form name="form1" method="post" action="Test.aspx" id="form1">
<div>
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUJNzgzNDMwNTMzZGRFekXifzWDNb+qFWPbJumdlZh/dQ==" />
</div> <script type="text/javascript" src="/AJAXDemo.2/ajaxpro/prototype.ashx"></script>
<script type="text/javascript" src="/AJAXDemo.2/ajaxpro/core.ashx"></script>
<script type="text/javascript" src="/AJAXDemo.2/ajaxpro/converter.ashx"></script>
<script type="text/javascript" src="/AJAXDemo.2/ajaxpro/AJAXDemo.Examples.Test.TestMethod,App_Code.un7rskvh.ashx"></script> <div>
<input id="Button1" type="button" onclick="doTest()" value="测试"/></div>
</form>
</body>
</html>
一定要注意这几行
<script type="text/javascript" src="/AJAXDemo.2/ajaxpro/prototype.ashx"></script>
<script type="text/javascript" src="/AJAXDemo.2/ajaxpro/core.ashx"></script>
<script type="text/javascript" src="/AJAXDemo.2/ajaxpro/converter.ashx"></script>
<script type="text/javascript" src="/AJAXDemo.2/ajaxpro/AJAXDemo.Examples.Test.TestMethod,App_Code.urx4hqkg.ashx"></script>
通过使用http://localhost:3578/AJAXDemo.2/ajaxpro/prototype.ashx和http://localhost:3578/AJAXDemo.2/ajaxpro/core.ashx不难发现，其中前面两个是源代码中带的两个js文件（core.js和prototype.js）转化出来的，基本内容也跟原来的文件一样，而converter.ashx和AJAXDemo.Examples.Test.TestMethod,App_Code.urx4hqkg.ashx里面有什么呢？看下面：
AJAXDemo.Examples.Test.TestMethod,App_Code.urx4hqkg.ashx
addNamespace("AJAXDemo.Examples.Test");
AJAXDemo.Examples.Test.TestMethod_class = Class.create();
AJAXDemo.Examples.Test.TestMethod_class.prototype = (new AjaxPro.AjaxClass()).extend({
GetTest: function(testText) {
return this.invoke("GetTest", {"testText":testText}, this.GetTest.getArguments().slice(1));
},
initialize: function() {
this.url = '/AJAXDemo.2/ajaxpro/AJAXDemo.Examples.Test.TestMethod,App_Code.un7rskvh.ashx';
}
});
AJAXDemo.Examples.Test.TestMethod = new AJAXDemo.Examples.Test.TestMethod_class();
converter.ashx
addNamespace("Ajax.Web"); Ajax.Web.NameValueCollection = function()
{
this.__type = "System.Collections.Specialized.NameValueCollection"; this.add = function(key, value) {
if(this[key] == null) {
this[key] = value;
}
}
this.getKeys = function() {
var keys = [];
for(key in this)
if(typeof this[key] != "function")
keys.push(key);
return keys;
}
this.getValue = function(key) {
return this[key];
}
this.toJSON = function() {
var o = this;
o.toJSON = null;
delete o.toJSON;
return AjaxPro.toJSON(o);
}
}
addNamespace("Ajax.Web");
Ajax.Web.DataTable = function(columns, rows) { this.__type = "System.Data.DataTable, System.Data";
this.Columns = new Array();
this.Rows = new Array(); this.addColumn = function(name, type) {
var c = new Object();
c.Name = name;
c.__type = type;
this.Columns.push(c);
} this.toJSON = function() {
var dt = new Object(); dt.Columns = [];
for(var i=0; i<this.Columns.length; i++)
dt.Columns.push([this.Columns[i].Name, this.Columns[i].__type]); dt.Rows = [];
for(var i=0; i<this.Rows.length; i++) {
var row = [];
for(var j=0; j<this.Columns.length; j++)
row.push(this.Rows[i][this.Columns[j].Name]);
dt.Rows.push(row);
} return AjaxPro.toJSON(dt);
} this.addRow = function(row) {
this.Rows.push(row);
} if(columns != null) {
for(var i=0; i<columns.length; i++) {
this.addColumn(columns[i][0], columns[i][1]);
}
} if(rows != null) {
for(var i=0; i<rows.length; i++) {
var row = new Object();
for(var c=0; c<this.Columns.length && c<rows[i].length; c++) {
row[this.Columns[c].Name] = rows[i][c];
}
this.addRow(row);
}
}
}
addNamespace("Ajax.Web");
Ajax.Web.DataSet = function(tables) {
this.__type = "System.Data.DataSet, System.Data";
this.Tables = new Array(); this.addTable = function(table) {
this.Tables.push(table);
} if(tables != null) {
for(var i=0; i<tables.length; i++) {
this.addTable(tables[i]);
}
}
} function Person(id) {
this.FirstName = "";
this.FamilyName = "";
this.Age = 0;
this.ID = id;
this.__type = 'AJAXDemo.Examples.Classes.Person, App_Code.un7rskvh, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null';
} Person.prototype.get_FullName = function() {
return this.FirstName + " " + this.FamilyName;
} Person.prototype.toJSON = function() {
var o = new Object(); o.firstName = this.FirstName;
o.familyName = this.FamilyName;
o.age = this.Age;
o.id = this.ID; return AjaxPro.toJSON(o);
} Person.prototype.save = function() {
return Person.save(this);
} Person.save = function(p) {
var ps = new PersonSaver();
return ps.savePerson(p); // synchronous call
} var PersonSaver = Class.create();
PersonSaver.prototype = (new AjaxPro.Request()).extend({
savePerson: function(p) {
return this.invoke("SavePerson", {"p":p}).value;
},
initialize: function() {
this.url = "ajaxpro/AJAXDemo.Examples.Classes.Person, App_Code.un7rskvh, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null.ashx";
}
}) 正因为是有了上面四个ashx文件我们的
function doTest()
{
AJAXDemo.Examples.Test.TestMethod.GetTest("AjaxPro",doTest_callback);
}
才得以异步执行，这些ashx文件又是怎么生成到页面上的，那得归功于web.config的相关配置和下面这句代码：
Utility.RegisterTypeForAjax(typeof(AJAXDemo.Examples.Test.TestMethod)); 至于Utility.RegisterTypeForAjax方法产生的一序列动作我将在后文中继续说明，有兴趣的可以自己跟踪下这些代码的执行。 |
