使用MVVM进行WPF帧导航绑定

本文介绍了使用MVVM进行WPF帧导航绑定的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 限时删除！！ 大家好我有一个使用MVM模式的WPF应用程序。在应用程序中，我有一个框架来托管我的页面a和b，但是当我将视图从页面a更改为b，并尝试将我的视图更改回页面a时，它不会为我带来新页面而是会带回页面一个与旧的国家。我怎么能阻止它？下面是我的xaml和视图模型的代码 xaml < MenuItem 标题 = 运算符 可见性 = {绑定路径= MenuVisibility，Converter = {StaticResource BooleanToVisibilityConverter}} 命令 = {Binding Path = ViewMenuCommand} / > < 框架 Grid.Row = 1 名称 = MainAPpFrame NavigationUIVisibility = 隐藏 来源 = {Binding Path = DisplayPage，Mode = TwoWay} Horizo​​ntalContentAlignment = 拉伸 VerticalContentAlignment = 拉伸 / > 我的视图模型 私人页面displayPage; public 页面DisplayPage { get { return displayPage; } set { if （displayPage == value ） { return ; } 此 .displayPage = value ; base .OnPropertyChanged（ DisplayPage）; } } public ICommand ViewMenuCommand { get { if （_operatorViewMenuCommand == null ） { _operatorViewMenuCommand = new RelayCommand（ param = > this .ProcessNavRequest（））; } return _operatorViewMenuCommand; } } 私有 void ProcessNavRequest（ ） { // string uri = String.Format（/ View / {0} ，参数）; 此 .DisplayPage = new OperatorView（）; } 解决方案 private Page _displayPage; public Page DisplayPage { get { return _displayPage; } 设置 { if（等于（_displayPage，value）） { return; } this._displayPage = value; OnPropertyChanged（DisplayPage）; } } private RelayCommand _operatorViewMenuCommand; public ICommand ViewMenuCommand { get { if（_operatorViewMenuCommand == null） { _operatorViewMenuCommand = new RelayCommand（param => ; this.ProcessNavRequest（DisplayPage））; } 返回_operatorViewMenuCommand; } } public void ProcessNavRequest（Page page） { // string uri = String.Format（/ View / {0}，参数） ; this.DisplayPage = page; } 我来自myCommand打电话 StartScreenViewModel.ProcessNavRequest（new ImportForm（））; 但它不记得导航 Hi guys I have a WPF application that is using MVM pattern. In the application I have a frame that host my page a and b, however when I change view from page a to b, and try to change my view back to page a, it does not bring me a new page instead it brings back page a with its old state. How can I stop that? Below is my code for both my xaml and view modelxaml<MenuItem Header="Operator" Visibility="{Binding Path=MenuVisibility, Converter={StaticResource BooleanToVisibilityConverter}}" Command="{Binding Path=ViewMenuCommand}" /><Frame Grid.Row="1" Name="MainAPpFrame" NavigationUIVisibility="Hidden" Source="{Binding Path=DisplayPage, Mode=TwoWay}" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" />my view modelprivate Page displayPage; public Page DisplayPage { get { return displayPage; } set { if (displayPage == value) { return; } this.displayPage = value; base.OnPropertyChanged("DisplayPage"); } }public ICommand ViewMenuCommand { get { if (_operatorViewMenuCommand == null) { _operatorViewMenuCommand = new RelayCommand( param => this.ProcessNavRequest()); } return _operatorViewMenuCommand; } }private void ProcessNavRequest() { //string uri = String.Format("/View/{0}", parameter); this.DisplayPage = new OperatorView(); } 解决方案 private Page _displayPage; public Page DisplayPage { get { return _displayPage; } set { if (Equals(_displayPage, value)) { return; } this._displayPage = value; OnPropertyChanged("DisplayPage"); } } private RelayCommand _operatorViewMenuCommand; public ICommand ViewMenuCommand { get { if (_operatorViewMenuCommand == null) { _operatorViewMenuCommand = new RelayCommand(param => this.ProcessNavRequest(DisplayPage)); } return _operatorViewMenuCommand; } } public void ProcessNavRequest(Page page) { //string uri = String.Format("/View/{0}", parameter); this.DisplayPage = page; }I call from myCommandStartScreenViewModel.ProcessNavRequest(new ImportForm());But it does not remember the navigation 这篇关于使用MVVM进行WPF帧导航绑定的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 1403页，肝出来的..