基于 Silverlight的快速开发框架RapidSL之MVVM解析
RapidSL框架基于WCF RIAService + EF + MVVM,UI 采用了DomainService + RiaControls + EasySL Controls,对sl传统的开发方式进行了集成和封装,核心模块基于View,ViewModel模型,基本上只需要修改View视图就可以完成 CRUD操作,提供了非常便捷的快速开发方式;
一. Model(Domain Model)
1. RIA Service端通过EF生成
2. 然后在sl项目选中“WCF RIA Services link”,
3. 会自动生成UI Model,省去了DTO,保存在Generated_Code
二. ViewModel
1. 使用了LightMVVM,继承自ViewModelBase
2. 作为前端绑定的业务实体如:
protected bool isShowDataFormPanel;
public virtual bool IsShowDataFormPanel
{
get
{
return isShowDataFormPanel;
}
set
{
isShowDataFormPanel = value;
RaisePropertyChanged("IsShowDataFormPanel");
}
}
3. 作为视图绑定事件通知的RelayCommand
protected ICommand itemEdit;
public virtual ICommand ItemEdit
{
get
{
if (itemEdit == null)
itemEdit = new RelayCommand(() =>
{
this.IsShowDataFormPanel = true;
});
return itemEdit;
}
}
4.注入ViewModel到App资源,[StaticResource(Key..., 和在App.xaml里写资源是一样的
namespace RapidSL.UI.ViewModels
{
[StaticResource("MainViewModel")]
public partial class MainViewModel : MyViewModelBase
5. 我实现了一个通用的带CRUD ViewModel:
三. View
1. 赋DataContext为对应的ViewModel
<UserControl.DataContext>
<Binding Source="{StaticResource Article_ItemViewModel}"/>
</UserControl.DataContext>
2. Binding和Command
<Button Command="{Binding ItemDelete}" IsShow="{Binding IsShowDataFormPanel, Mode=TwoWay}">
下载:http://easysl.codeplex.com/releases/view/26522
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