我如何使一个类创建一个PictureBox对象内的形式

本文关键字：对象 PictureBox 一个 何使一 创建 | 更新日期: 2023-09-27 18:16:08

我试图创建一个MainCharacter类，其工作是根据每次加载时通过房间传递的一些参数在"房间"对象内创建PictureBox。

下面是MainCharacter类的代码:

namespace VirtualMuseum
{
    class MainCharacter
    {
        string characterName;
        int characterGender;
        bool registeredUser;
        int[] playerPosition;

        // Character constructor
        public MainCharacter(string name, int gender, bool registered, int[] location)
        {
            characterName = name;
            characterGender = gender;
            registeredUser = registered;
            playerPosition = location;
        }
        public void drawCharacter()
        {
            PictureBox playerBox = new PictureBox();
            playerBox.Image = Properties.Resources.mc___main_characters_sprites_by_ssb_fan4ever_d53kkhx;
            playerBox.Width = 28;
            playerBox.Height = 32;
            playerBox.Location = new Point(playerPosition[0], playerPosition[1]);
            playerBox.Visible = true;    
        }
    }
}

以及在room1中创建播放器对象的代码行，例如

MainCharacter player1 = new MainCharacter(playerName, playerGender, registeredUser, playerPosition);

问题是当进入创建播放器对象的特定房间时，没有PictureBox在表单内可见。

-----新增动作-----

根据您的指示，在Room类

中使用以下代码
public Hall()
    {
        playerPosition = new int[] { 350, 400 };
        InitializeComponent();
        //pictureBox2.Parent = pictureBox1;
        MessageBox.Show(playerPosition.ToString());
        MainCharacter player1 = new MainCharacter(playerName, playerGender, registeredUser, playerPosition);
        player1.drawCharacter(this);
}

和MainCharacter类中的以下代码:

public void drawCharacter(Form form)
    {
        PictureBox playerBox = new PictureBox();
        playerBox.Image = Properties.Resources.mc___main_characters_sprites_by_ssb_fan4ever_d53kkhx;
        playerBox.Width = 28;
        playerBox.Height = 32;
        playerBox.Location = new Point(playerPosition[0], playerPosition[1]);
        // Add the pictureBox to the selected form
        form.Controls.Add(playerBox);
}

我设法在表单中绘制一些东西，但它似乎是一条非常小的线，尽管我在drawCharacter方法中定义了picturebox的大小。

我如何使一个类创建一个PictureBox对象内的形式

Option1
有一个窗体的实例，在drawCharacter:

的末尾添加以下代码
formInstance.Controls.Add(playerBox);
例如:

public void drawCharacter(Form formInstance)
{
    PictureBox playerBox = new PictureBox();
    // Set properties ...
    formInstance.Controls.Add(playerBox);
}

然后在表单中，当你需要调用这个方法时使用:

 var player1 = new MainCharacter(playerName, playerGender, registeredUser, playerPosition);
 player1.drawCharacter(this);

Option2
你可以改变你的方法来返回一个PictureBox:

public PictureBox drawCharacter()
{
    PictureBox playerBox = new PictureBox();
    // Set properties ...
    return  playerBox;
}

然后在表单中，当你需要调用这个方法时使用:

var player1 = new MainCharacter(playerName, playerGender, registeredUser, playerPosition);
this.Controls.Add(player1.drawCharacter());
关键字:
  • 正如"Ivan Stoev"在评论中提到的，所有控件必须添加到Controls集合的形式。
    • 不要忘记将位置属性设置为合适的位置或更好的选项，使用FlowLayoutPanel并将您的PictureBox添加到其中。例如，如果你把一个FlowLayoutPabel从(flowLayoutPanel1)，你可以使用选项2，并以这种方式添加图片框
使用FlowLayoutPanel的代码: 
var player1 = new MainCharacter(playerName, playerGender, registeredUser, playerPosition);
this.flowLayoutPanel1.Controls.Add(player1.drawCharacter());

您忘记将PictureBox添加到表单中。没有表格来安置你的PictureBox将不会出现。您的代码可能需要将表单传递到drawCharacter()方法中，并在该方法中添加如下内容:

YourFormVariable.Controls.Add(playberBox)

作为旁注:您不希望一遍又一遍地向表单添加PictureBox，您希望添加一个并不断操作它。我只提到这是一个警告，因为drawCharacter()听起来像它可以在"渲染"类型循环中调用。

问题是，你不传递你的表单实例到你的类，所以它不能创建控制。将drawCharacter方法更改为:

  class MainCharacter
    {
    string characterName;
    int characterGender;
    bool registeredUser;
    int[] playerPosition;
    // Character constructor
    public MainCharacter(string name, int gender, bool registered, int[] location)
    {
        characterName = name;
        characterGender = gender;
        registeredUser = registered;
        playerPosition = location;
    }
    public void drawCharacter(Form form)
    {
        PictureBox playerBox = new PictureBox();
        playerBox.Image = Properties.Resources.mc___main_characters_sprites_by_ssb_fan4ever_d53kkhx;
        playerBox.Width = 28;
        playerBox.Height = 32;
        playerBox.Location = new Point(playerPosition[0], playerPosition[1]);
        playerBox.Visible = true;
        form.Controls.Add(playerBox);
    }
}

并像这样使用:

MainCharacter player1 = new MainCharacter(playerName, playerGender, registeredUser, playerPosition);
player1.drawCharacter(this);
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