donet/Wpf/Prism1/ModuleB/ViewModels/ViewBModel.cs

using System;
using System.Runtime.Intrinsics.X86;
using System.Windows;
using Prism.Mvvm;
using Prism.Regions;

namespace ModuleB.ViewModels;

public class ViewBModel : BindableBase, INavigationAware,IConfirmNavigationRequest
{
    private string _name;

    public string Name
    {
        get => _name;
        set
        {
            _name = value;
            RaisePropertyChanged();
        }
    }

    /// <summary>
    ///     每次导航到此页面都会调用，是否重用实例
    /// </summary>
    /// <param name="navigationContext"></param>
    /// <returns></returns>
    public bool IsNavigationTarget(NavigationContext navigationContext)
    {
        return true;
    }

    /// <summary>
    ///     导航到此页面时调用
    /// </summary>
    /// <param name="navigationContext"></param>
    public void OnNavigatedTo(NavigationContext navigationContext)
    {
        if (!navigationContext.Parameters.ContainsKey("name")) return;
        var value = navigationContext.Parameters.GetValue<string>("name");
        Name = value;
    }

    /// <summary>
    ///     来自哪里的导航
    /// </summary>
    /// <param name="navigationContext"></param>
    public void OnNavigatedFrom(NavigationContext navigationContext)
    {
    }

    /// <summary>
    ///     是否能够切换出去
    /// </summary>
    /// <param name="navigationContext"></param>
    /// <param name="continuationCallback"></param>
    public void ConfirmNavigationRequest(NavigationContext navigationContext, Action<bool> continuationCallback)
    {
        var result = MessageBox.Show("是否能够切换出去？","提示", MessageBoxButton.YesNo);
        if (result == MessageBoxResult.Yes)
        {
            continuationCallback(true);
        }
    }
}