Question

我在c＃中创建了一个简单的Tic-Tac-Toe游戏，到目前为止我只有2种形式。

frmMain.（主要游戏形式）
frmPlayerInfo.（用于选择单人或2人）

我还创建了一个类Player。

所以我的确如此。一旦玩家输入他们的名字，它将转到Player类中的属性并将值存储在私有变量中，以便我可以在主窗体上获取它以用于显示目的。但当我回到主要形式时，属性会带回null，为什么会这样？

继承我的代码。

播放器类...（我删除了与此问题无关的相关属性和变量）

class Player
{
    #region PrivatVariables
    private string _PlayerName1;
    private string _PlayerName2;
    #endregion

    #region Properties
    public string playerName1
    {
        get
        {
            return _PlayerName1;
        }
        set
        {
            _PlayerName1 = value;
        }
    }

    public string playerName2
    {
        get
        {
            return _PlayerName2;
        }
        set
        {
            _PlayerName2 = value;
        }
    }
    #endregion


    public Player()
    {
        // Do nothing
    }

    internal void resetValues()
    {
    }
}

主表单...（我刚刚包含主要代码，我在表单加载时调用新游戏代码）

public partial class frmMain : Form
{
    Player player = new Player();

    public frmMain()
    {
        InitializeComponent();
    }

    private void frmMain_Load(object sender, EventArgs e)
    {
        // TODO : Set timer so that form can load first.

        newGame();
    }

    private void newGame()
    {
        // Creating an instance of the Form used to take in player info.
        frm_PlayerInfo playerInfo = new frm_PlayerInfo();
        // This is  going to pop up the player info form.
        DialogResult dialogResult = playerInfo.ShowDialog(); 
        LoadForm();
    }

    private void LoadForm()
    {
        grpBoxPlayer1.Text = player.playerName1;
    }

玩家信息表格...（）

 public partial class frm_PlayerInfo : Form
{
    Player player = new Player();

    bool isAnimated;

    public frm_PlayerInfo()
    {
        InitializeComponent();
    }

    private void frm_PlayerInfo_Load(object sender, EventArgs e)
    {
        // Setting player tow input visibility to false because there will always be one player.
        this.txtPlayerName2.Visible = false;
        this.lblPlayerName2.Visible = false;
    }

    private void btnNext_Click(object sender, EventArgs e)
    {
        btnNext.Visible = false;

        // Used to slide the Form up or down.
        slideAnimation(ref isAnimated);
    }

    private void btnStart_Click(object sender, EventArgs e)
    {
        // Populating the Player Properties
        player.playerName1 = this.txtPlayerName1.Text;


        if (this.txtPlayerName2.Text != "")
        {
            player.playerName2 = this.txtPlayerName2.Text;
        }

        // Calling the animation method to close the animation back up and then the form will be closed.
        slideAnimation(ref isAnimated);
        FadeOutAnimation();
    }

Answer 1

在frmMain中创建Player类的实例，并将其传递给构造函数中的frmplayerInfo。现在你没有在frmMain中引用Player类。

newGame()方法中的

：

private void newGame()
{
    Player player = new Player();
    // Creating an instance of the Form used to take in player info.
    frm_PlayerInfo playerInfo = new frm_PlayerInfo(player);
    // This is  going to pop up the player info form.
    DialogResult dialogResult = playerInfo.ShowDialog(); 
    LoadForm();
}

并在frm_PlayerInfo类中删除此代码行Player player = new Player();，并更改它的构造函数：

public partial class frm_PlayerInfo : Form
{
Player player;

public frm_PlayerInfo(Player player)
{
    InitializeComponent();
    this.player = player;
}
// the rest of the form

另一种选择是让玩家直接在frmPlayerInfo中命名属性。

私有类变量不断在表单之间重置

1 个答案: