基于Silverlight的快速开发框架RapidSL新特性解析

转载于 2013-06-17 11:32:59 发布 · 499 阅读

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对sl传统的开发方式进行了集成和封装，核心模块基于MVVM，通用的CRUD ViewModel，只需要定制自己的Xaml View，提供了非常便捷的快速开发方式; 采用了Silverlight 5.0 + EF4.1 Code First + Ria Service SP2 + Ria Service Toolkit + Silverlight Control Toolkit + Light MVVM；已经实现了轻量级的权限管理，上传模块，内容管理，作为实例，涉及到了sl开发的各种技术难点和技巧，既可以作为学习，也可以作为项目开发的原型

点击预览 | 源代码

支持动态加载.xap，面向插件开发

RapidSL.SL.App.Portal提供主框架的UI逻辑，只需要开发自己的App，如RapidSL.SL.App.Main

然后配置菜单：
1 < sdk:TreeViewItem Header ="产品管理" IsExpanded ="True" >
2                                  < controls:AdminMenuItem Id ="1" Margin ="2" Content ="ProductEdit" NavigateView ="RapidSL.SL.App.Main.xap/Product.Index" ViewPermission ="ProductView" />
3                                  < controls:AdminMenuItem Id ="2" Margin ="2" Content ="CategoryEdit" NavigateView ="RapidSL.SL.App.Main.xap/Category.Index" ViewPermission ="CategoryView" />
4                              </ sdk:TreeViewItem >

NavigateView="RapidSL.SL.App.Main.xap/Product.Index"将调用XapHost控件从服务端下载动态加载

NavigateView="RapidSL.SL.App.Portal.Admin"将调用当前程序集的控件
XapHost控件提供动态下载.xap及加载

1 public XapHost( string xapUri, string viewName = null)
2         {
3             InitializeComponent();
4
5              this.FileName = xapUri;
6
7              var xapLoad = new XapLoader(xapUri);
8             xapLoad.DownloadProgressChanged += (s, e) =>
9             {
10                  this.TotalSize = (e.TotalBytesToReceive * 1d / 1024 / 1024).ToString( " 0.00 ");
11                  this.Percentage = e.ProgressPercentage;
12             };
13
14             xapLoad.LoadCompleted += (s, e) =>
15             {
16                  this.Content = e.Element;
17             };
18
19             xapLoad.LoadControl( null, viewName);
20         }

对Resource的支持

找到所有标识有 StaticResourceAttribute的类，然后创建相关实例，并注入到Application.Resources，相当于在 App.xaml里手写资源
实现了资源管理器对资源进行注入管理

 
 
 View Code

键盘Enter键提交表单

- 使用AttatchProperty实现传统Html表单的键盘Enter提交
  1 < Grid x:Name ="LayoutRoot" core:AttachProperties.SubmitButton =" {Binding ElementName=submit} " >
  2 < Button x:Name ="submit" Content ="登录" Margin ="20,0,20,0" Padding ="20,0,20,0" Command =" {Binding UserLogin} " />
  3 </ Grid >

具体绑定按钮和键盘事件

1 #region SubmitButton AttachProperty
2          public static object GetSubmitButton(DependencyObject obj)
3         {
4              return ( object)obj.GetValue(SubmitButtonProperty);
5         }
6
7          public static void SetSubmitButton(DependencyObject obj, object value)
8         {
9             obj.SetValue(SubmitButtonProperty, value);
10         }
11
12          // Using a DependencyProperty as the backing store for SubmitButton.  This enables animation, styling, binding, etc...
13          public static readonly DependencyProperty SubmitButtonProperty =
14             DependencyProperty.RegisterAttached( " SubmitButton ", typeof( object), typeof(AttachProperties), new PropertyMetadata(SubmitButtonChanged));
15
16          private static void SubmitButtonChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
17         {
18              var button = (ButtonBase)e.NewValue;
19              var form = d as UIElement;
20             form.KeyDown += (s, se) =>
21             {
22                  if (se.Key == Key.Enter)
23                 {
24                     button.Focus();
25                      if (button.Command != null)
26                        button.Dispatcher.BeginInvoke(()=>  button.Command.Execute( null));
27                 }
28             };
29         }
30          #endregion