Prism 基础知识学习（三）导航功能

Prism 基础知识学习（三）导航功能

1. 自动匹配（AutoWireViewModel）

   在View文件中加入下面代码，让View与对应的ViewModel自动绑定

xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"

2. 手动设置。在Module的配置文件中修改RegisterTypes对应关系。

   public class ModuleAModule : IModule
   {
       public void OnInitialized(IContainerProvider containerProvider)
       {
   
       }
   
       public void RegisterTypes(IContainerRegistry containerRegistry)
       {
           containerRegistry.RegisterForNavigation<ViewA, ViewAViewModel>();
       }
   }
   
   

3. 导航字典功能。

   在MainViewModels 中添加导航参数，然后在ViewA中进行接收

   MainWindowViewModel.cs

        private void Open(string obj)
        {
            NavigationParameters keys = new NavigationParameters();
            keys.Add("Title", "Hello!");
   
            regionManager.Regions["ContentRegion"].RequestNavigate(obj, keys);
        }
   
   

​ 然后在ViewAViewModel.cs

    public class ViewAViewModel :BindableBase, IConfirmNavigationRequest
    {
        private string title;

        public string Title
        {
            get { return title; }
            set { title = value; }
        }


        public ViewAViewModel()
        {
        }

        /// <summary>
        /// 每次重新导航的时候，是否重用原来的实例
        /// </summary>
        /// <param name="navigationContext"></param>
        /// <returns></returns>
        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            Title= navigationContext.Parameters.GetValue<string>("Title");
        }

        /// <summary>
        /// 是否允许切换到下一个界面
        /// </summary>
        /// <param name="navigationContext"></param>
        /// <param name="continuationCallback"></param>
        public void ConfirmNavigationRequest(NavigationContext navigationContext, Action<bool> continuationCallback)
        {
            bool result = true;
            if (MessageBox.Show("确认导航？", "温馨提示", MessageBoxButton.YesNo) == MessageBoxResult.No)
                result = false;
            continuationCallback(result);
        }