【AjaxPro实现机制浅析一】AjaxPro内部为我们做什么工作？
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：
Test.aspx
<%
@ 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
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using AjaxPro;
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.TestMethod
using System;
using AjaxPro;
/**//// <summary>
/// TestMethod 的摘要说明
/// </summary>
namespace AJAXDemo.Examples.Test
{
public class TestMethod
{
public TestMethod()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
[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.urx4hqkg.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.urx4hqkg.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.urx4hqkg, 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.urx4hqkg, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null.ashx";
}
})
：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：
Test.aspx
<%@ 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
using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using AjaxPro;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.TestMethod
using System;using AjaxPro;/**//// <summary>/// TestMethod 的摘要说明/// </summary>namespace AJAXDemo.Examples.Test{ public class TestMethod { public TestMethod() { // // TODO: 在此处添加构造函数逻辑 // } [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.urx4hqkg.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.urx4hqkg.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.urx4hqkg, 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.urx4hqkg, 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。
[未完待续]
http://hedonister.cnblogs.com/archive/2006/03/16/351552.html