在Windows Phone 7上使用页面导航的MVVM
发布时间:2020-12-14 04:27:39 所属栏目:Windows 来源:网络整理
导读:Windows Phone 7中的导航框架是Silverlight中的简化版本.您只能导航到Uri而不能传入视图.由于NavigationService与View绑定,因此人们如何使其适应MVVM.例如: public class ViewModel : IViewModel{ private IUnityContainer container; private IView view;
Windows Phone 7中的导航框架是Silverlight中的简化版本.您只能导航到Uri而不能传入视图.由于NavigationService与View绑定,因此人们如何使其适应MVVM.例如:
public class ViewModel : IViewModel { private IUnityContainer container; private IView view; public ViewModel(IUnityContainer container,IView view) { this.container = container; this.view = view; } public ICommand GoToNextPageCommand { get { ... } } public IView { get { return this.view; } } public void GoToNextPage() { // What do I put here. } } public class View : PhoneApplicationPage,IView { ... public void SetModel(IViewModel model) { ... } } 我正在使用Unity IOC容器.我必须首先解析我的视图模型,然后使用View属性来获取视图然后显示它.但是使用NavigationService,我必须传入一个视图Uri.我无法先创建视图模型.有没有办法解决这个问题. 解决方法
而不是通过构造函数传递视图.您可以先通过NavigationService构建视图,然后将其传递给视图模型.像这样:
public class ViewModel : IViewModel { private IUnityContainer container; private IView view; public ViewModel(IUnityContainer container) { this.container = container; } public ICommand GoToNextPageCommand { get { ... } } public IView { get { return this.view; } set { this.view = value; this.view.SetModel(this); } } public void GoToNextPage() { // What do I put here. } } PhoneApplicationFrame frame = Application.Current.RootVisual; bool success = frame.Navigate(new Uri("View Uri")); if (success) { // I'm not sure if the frame's Content property will give you the current view. IView view = (IView)frame.Content; IViewModel viewModel = this.unityContainer.Resolve<IViewModel>(); viewModel.View = view; } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |