Asp.net Ajax 客户端编程(二)——Type 类,面向对象编程的开始
微软的ASP.NET AJAX能写出丰富的,可交互的JavaScript程序,我们可以通过Type类来注册命名空间,类,枚举等,反射对象的内部性质,Type类是Asp.net Ajax的一个很重要类。
Type.registerNamespace(namespacePath) 注册一个命名空间。
Type.isNamespace(object) 判断一个对象是否是命名空间。
classInstanceVar.registerClass(typeName, baseType, interfaceTypes) 注册一个类,typeName,要注册的类名,baseType继承的类,可以为空,interfaceTypes,继承的接口,可以为空。
Type.isClass(type) 判断一个对象是否是一个类。
typeInstanceVar.getName() 获取一个对象的类型名。typeInstanceVar是一个类型,可以用Object.getType(对象实例)来获取。
TypeA.isInstanceOfType(instance) 判断一个实例是否是某个类的实例。
typeInstanceVar.registerInterface(typeName) 注册一个接口。
Type.isInterface(type) 判断一个类型是否是接口。
aType.isImplementedBy(typeInstanceVar) 判断一个类是否实现了接口。typeInstanceVar为类实例
typeInstanceVar.implementsInterface(interfaceType) 也是判断一个类是否实现了接口,interfaceType为要判断的接口
<script language="javascript" type="text/javascript">
//Demo:http://young18.cnblogs.com
//注册命名空间
Type.registerNamespace("Arcadia");
Arcadia.IStudent = function(){ }
Arcadia.IStudent.Prototype = {
Study: function(){}
}
//注册接口
Arcadia.IStudent.registerInterface('Arcadia.IStudent');
Arcadia.Student = function(name, age) {
this._name = name;
this._age = age;
}
Arcadia.Student.prototype = {
GetName:function(){
return this._name;
},
GetAge:function(){
return this._age;
},
ToString:function(){
return "Name:"+this._name+"\nAge:"+this._age;
},
Study: function(){ return "好好学习"; }
}
Arcadia.Student.registerClass("Arcadia.Student",null,Arcadia.IStudent);
if(Type.isNamespace(Arcadia))
alert("Arcadia是命名空间");
if(Type.isInterface(Arcadia.IStudent))
alert("Arcadia.IStudent是接口");
if(Type.isClass(Arcadia.Student))
alert("Arcadia.Student是一个类");
var young = new Arcadia.Student("Young",24);
alert("young的类名是:" + Object.getType(young).getName());
if(Arcadia.Student.isInstanceOfType(young))
alert("young是Arcadia.Student的一个实例");
if(Arcadia.Student.implementsInterface(Arcadia.IStudent))
alert("Arcadia.Student实现了接口Arcadia.IStudent");
</script>
TypeA.inheritsFrom(parentType) 判断类TypeA是否继承自基类parentType。
instanceVar.callBaseMethod(instance, name, baseArguments) 调用基类方法,instance 为instanceVar的类型,通常为this,name 为要调用的方法名,baseArguments为调用时传入的参数(数组)。
typeInstanceVar.getBaseType() 获取基类类型
typeVar.getInterfaces() 获取一个基类继承的所有接口。
Type.getRootNamespaces() 获取当前客户端应用程序的所有根命名空间。
typeVar.baseClassName.initializeBase(instance, baseArguments ) 实例化基类,instance为要实例化的基类名,baseArguments 为实例化时传递的参数。
<form id="form1" runat="server">
<%--Demo:http://young18.cnblogs.com--%>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<script language="javascript" type="text/javascript">
//注册一个命名空间
Type.registerNamespace("Arcadia");
Arcadia.Student = function(name, age) {
this._name = name;
this._age = age;
}
Arcadia.Student.prototype = {
SetName:function(name){
this._name = name;
},
GetName:function(){
return this._name;
},
SetAge:function(age){
this._age = age;
},
GetAge:function(){
return this._age;
},
ToString:function(){
return "Name:"+this._name+"\nAge:"+this._age;
}
}
//在Arcadia命名空间下注册一个Student类
Arcadia.Student.registerClass("Arcadia.Student");
//定义一个Student类的子类GirlStudent
Arcadia.GirlStudent = function(name, age){
//实例化基类,且其基类属性在GirlStudent中被继承。
Arcadia.GirlStudent.initializeBase(this, [name, age]);
this._sex="female";
}
Arcadia.GirlStudent.prototype = {
//设置性别的只读属性
GetSex:function(){
return this._sex;
},
ToString:function(){
//调用基类方法来重写ToString方法。
return Arcadia.GirlStudent.callBaseMethod(this, 'ToString') + "\nSex:美女";
}
}
//注册GirlStudent类,包括和Student的继承关系。
Arcadia.GirlStudent.registerClass("Arcadia.GirlStudent",Arcadia.Student);
//下面方法类测试上面的对象。
//分别实例化Student和GirlStudent对象。
var student=new Arcadia.Student("Young",25);
var girlstudent=new Arcadia.GirlStudent("xiaoxue",23);
//调用实例方法。
function TestStudent()
{
alert(student.ToString());
}
//改变属性
function TestChangeStudent()
{
alert("改变前:\n"+student.ToString());
student.SetName("Jiang");
alert("改变后:\n"+student.ToString());
}
//用inheritsFrom判断继承关系。
function TestIfInheritFromStudent()
{
var isInherit = Arcadia.GirlStudent.inheritsFrom(Arcadia.Student);
if(isInherit)
alert("女学生类是从学生类中继承");
else
alert("女学生类没有继承自学生类");
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}
//测试子类重写后的方法。
function TestGirlStudent()
{
alert(girlstudent.ToString());
}
</script>
<a href="javascript:TestStudent()">测试学生类</a><br />
<a href="javascript:TestChangeStudent()">改变学生姓名</a><br />
<a href="javascript:TestIfInheritFromStudent()">判断女学生类是否继承自学生类</a><br />
<a href="javascript:TestGirlStudent()">测试女学生类</a>
</form>
ANamespace.AnEnum.registerEnum(name, flags) 注册一个枚举
Arcadia.Sex = function(){};
Arcadia.Sex.prototype =
{
boy: "男",
girl: "女"
}
Arcadia.Sex.registerEnum("Arcadia.Sex");
alert(Arcadia.Sex.boy);
Type.registerNamespace(namespacePath) 注册一个命名空间。
Type.isNamespace(object) 判断一个对象是否是命名空间。
classInstanceVar.registerClass(typeName, baseType, interfaceTypes) 注册一个类,typeName,要注册的类名,baseType继承的类,可以为空,interfaceTypes,继承的接口,可以为空。
Type.isClass(type) 判断一个对象是否是一个类。
typeInstanceVar.getName() 获取一个对象的类型名。typeInstanceVar是一个类型,可以用Object.getType(对象实例)来获取。
TypeA.isInstanceOfType(instance) 判断一个实例是否是某个类的实例。
typeInstanceVar.registerInterface(typeName) 注册一个接口。
Type.isInterface(type) 判断一个类型是否是接口。
aType.isImplementedBy(typeInstanceVar) 判断一个类是否实现了接口。typeInstanceVar为类实例
typeInstanceVar.implementsInterface(interfaceType) 也是判断一个类是否实现了接口,interfaceType为要判断的接口
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instanceVar.callBaseMethod(instance, name, baseArguments) 调用基类方法,instance 为instanceVar的类型,通常为this,name 为要调用的方法名,baseArguments为调用时传入的参数(数组)。
typeInstanceVar.getBaseType() 获取基类类型
typeVar.getInterfaces() 获取一个基类继承的所有接口。
Type.getRootNamespaces() 获取当前客户端应用程序的所有根命名空间。
typeVar.baseClassName.initializeBase(instance, baseArguments ) 实例化基类,instance为要实例化的基类名,baseArguments 为实例化时传递的参数。
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ANamespace.AnEnum.registerEnum(name, flags) 注册一个枚举
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