Question

我正在Visual Studio中使用C＃制作逆向游戏。我有一个带有MainViewModel.cs类的ViewModel命名空间，在其中创建了一个界面Screen。当我想在同一类名称空间中的WelcomeClassModel.cs之类的其他类中使用此接口时，它无法识别Screen。下面是我的一些代码示例。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;
using Model.Reversi;
using View;

namespace ViewModel
{
    class MainViewModel: INotifyPropertyChanged
    {
        private Screen screen;

        public event Action ExitApp;

        public event PropertyChangedEventHandler PropertyChanged;

        public Screen Screen
        {
            get { return this.screen; }
            set { this.screen = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Screen))); }
        }
        internal void Exit()
        {
            ExitApp?.Invoke();

        }
        public MainViewModel()
        {
            this.Screen = new WelcomeViewModel(this);

        }
    }
    public abstract class Screen
    {
        protected readonly MainViewModel mainModel;

        protected Screen(MainViewModel mainModel)
        {
            this.mainModel = mainModel;
        }

        protected void Switch(Screen screen)
        {
            this.mainModel.Screen = screen;
        }
    }

    public class ScreenWelcome : Screen
    {
        public ScreenWelcome(MainViewModel navigator) : base(navigator)
        {
            GoToGame = new EasyCommand(() => Switch(new ScreenGame(navigator)));
        }

        public ICommand GoToGame { get; }
    }

    public class ScreenGame : Screen
    {
        public ScreenGame(MainViewModel navigator) : base(navigator)
        {
            GoToWelcome = new EasyCommand(() => Switch(new ScreenWelcome(navigator)));
        }

        public ICommand GoToWelcome { get; }
    }
}

WelcomeViewModel类：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;
using ViewModel.Screen;
using Model.Reversi;

namespace ViewModel
{
    class WelcomeViewModel: Screen
    {
        private int width;
        private int height;

        public int Width
        {
            get { return width; }
            set {
                if (ReversiBoard.IsValidWidth(value))
                    this.width = value;
            }
        }

        public int Height
        {
            get { return height; }
            set
            {
                if (ReversiBoard.IsValidHeight(value))
                    this.height = value;
            }
        }
        public WelcomeViewModel(MainViewModel mainModel) : base(mainModel)
        {
            this.Width = 9;
            this.Height = 9;

            this.Options = new PlayerOptionsViewModel();

            Start = new EasyCommand(() =>
            {
                Switch(new GameViewModel(this.mainModel, Options, Width, Height));
            });
        }
        public PlayerOptionsViewModel Options { get; set; }
        public ICommand Start { get; }
    }
}

the：屏幕保持白色，这意味着它无法识别Screen类。这怎么可能？

有人解决吗？ [在此处输入图片描述] [1]

Answer 1

您最有可能得到

错误CS0051可访问性不一致：参数类型'MainViewModel'的访问权限比方法'ScreenWelcome.ScreenWelcome（MainViewModel）'少

在公共类ScreenWelcome中，您具有构造函数public ScreenWelcome(MainViewModel navigator)。该构造函数在其公共接口中公开MainViewModel，因此类MainViewModel也必须是公共的。公开

public class MainViewModel : INotifyPropertyChanged
{
    ...
}

无法识别同一名称空间中的接口导入？似乎MainViewModel与命名空间C＃中的其他类隔离

1 个答案: