使用 Asp.net Future May 2007 开发Silverlight应用

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› ASP.NET›ASP.NET编程经验

原作者: [db:作者] 来自: [db:来源] 收藏邀请

Microsoft ASP.NET Futures May 2007，这是一个Future的好东西，包括了：ASP.NET AJAX Futures，Silverlight Controls for ASP.NET，Dynamic Data Controls for ASP.NET，ASP.NET Application Services，Dynamic Languages Support in ASP.NET。今天尝试了一下Silverlight Controls for ASP.NET中的Xaml Control，Xaml Control是一个Asp.net AJAX扩展控件，使用这个控件就可以不需要引用silverlight.js文件了，也不需要调用Sys.Silverlight.createObject或者Sys.Silverlight.createObjectEx的脚本了，就像Asp.net 服务端控件那样使用，开发很简单，Js脚本可以按照ASP.NET AJAX JavaScript库进行面向对象的编程。在下面内容之前建议你先看下面两篇文章：

更新Silverlight ctp到Silverlight beta 1.0
ASP.NET AJAX 控件开发基础

下面这个例子是对Silverlight1.0SDK 时钟例子的重构:

1、首先下载安装 Microsoft ASP.NET Futures May 2007

2、创建一个ASPNETFuturesEnabledWebApplication类型项目

3、将Clock例子的js，xaml和assets文件夹拷贝到项目中，删除js目录下的silverlight.js文件

4、重构Clock.js代码如下：

designerClock = function() {
this.hourAnimation = null;
this.minuteAnimation = null;
this.secondAnimation = null;
}
designerClock.prototype = {
initializeComponent: function(slhost) {
var host = slhost.content;
this.hourAnimation = host.findName("hourAnimation");
this.minuteAnimation = host.findName("minuteAnimation");
this.secondAnimation = host.findName("secondAnimation");
}
}

Type.registerNamespace("Custom");

Custom.Clock = function(element)
{
Custom.Clock.initializeBase(this, [element]);
this._designer = new designerClock();
this.control = null;

}

Custom.Clock.prototype = {
xamlInitialize : function() {
Custom.Clock.callBaseMethod(this, 'xamlInitialize');
// We could push this into a base class for the designer file
this._designer.initializeComponent(this.get_element());

var now = new Date();

var hourAnimation = this._designer.hourAnimation;
var minuteAnimation = this._designer.minuteAnimation;
var secondAnimation = this._designer.secondAnimation;
if (hourAnimation) {
var hours = now.getHours();

// We need to include minutes as well. Because each hour consists of
// 30 degrees, each additional minute adds half a degree to the angle
// of the hour hand

var angle = (hours / 12) * 360 + now.getMinutes()/2;
angle += 180;

hourAnimation.from = angle.toString();
hourAnimation.to = (angle + 360).toString();
}

if (minuteAnimation) {
var minutes = now.getMinutes();
var angle = (minutes / 60) * 360;
angle += 180;

minuteAnimation.from = angle.toString();
minuteAnimation.to = (angle + 360).toString();
}

if (secondAnimation) {
var seconds = now.getSeconds();
var angle = (seconds / 60) * 360;
angle += 180;

secondAnimation.from = angle.toString();
secondAnimation.to = (angle + 360).toString();
}
},
dispose: function() {
if (this.control) {
this.control = null;
}
Custom.Clock.callBaseMethod(this, "dispose");
}
}
Custom.Clock.registerClass('Custom.Clock', Sys.Preview.UI.Xaml.Control);

在Default.aspx页面中加入一个Xaml Control，内容如下：

按Ctrl + F5运行就可以看到漂亮的时钟了。
源码下载：https://files.cnblogs.com/shanyou/SilverlightFutures.zip