C# 从另一个类VS2010访问Form1.picturebox1

我是C#的新手

我遇到了一些问题，我正在通过Form.cs[设计]在Form1中创建一些picturebox

我想从Form1访问图片框

所以我必须在另一个类上创建一个对象来访问Form1.picturebox1

但我能做对，有人能帮我吗

namespace RaceGame{
class Greyhound
{

    Form1 runner;

    public int StartingPosition = 13;
    public int RacetrackLength = 420;
    public PictureBox MyPictureBox = null;
    public int Location = 0;
    public Random Randomizer;

    public void Run()
    {

        runner.pictureDog1.Location = new Point(13, 100);
    }     
}

这是表格一

namespace RaceGame{public partial class Form1 : Form
{
    Greyhound racing = new Greyhound();
    public Form1()
    {
        InitializeComponent();
    }

    private void raceButton_Click(object sender, EventArgs e)
    {
        racing.Run();
    }



}

---

}

根据您提供的代码，您的Form1或“runner”未被分配。 你有两个选择- 1） 像这样公开你的跑步者

public Form1 runner

这将允许您（在窗体中，而不是在类中）将窗体分配给此属性

public class Form1
{
        protected void Form1_Load(object sender, EventArgs e)
        {
              Greyhound gh = new Greyhound();
              gh.runner = this;//this line here
              //then you can call gh.Run()
        }
}

另一种选择是使用构造函数，如下所示-

class Greyhound
{

    Form1 runner;

    public int StartingPosition = 13;
    public int RacetrackLength = 420;
    public PictureBox MyPictureBox = null;
    public int Location = 0;
    public Random Randomizer;

    //here
    public Greyhound(Form1 form)
    {
        this.runner = form;
    }
    public void Run()
    {

        runner.pictureDog1.Location = new Point(13, 100);
    }     
}

这将把表单传递到greyhound类中，供您访问，然后在表单代码中-

public class Form1
{
        protected void Form1_Load(object sender, EventArgs e)
        {
              Greyhound gh = new Greyhound(this);//pass the form as 'this'
              //then you can call gh.Run()
        }
}

编辑：
基于您提供的表单代码-

namespace RaceGame
{
    public partial class Form1 : Form
    {
         Greyhound racing = new Greyhound();
         public Form1()
         {
            InitializeComponent();
         }

         private void raceButton_Click(object sender, EventArgs e)
         {
              racing.runner = this;//assign property here
              racing.Run();
         }
    }
}

还有灰狗班

namespace RaceGame
{
    class Greyhound 
    {

        public Form1 runner;//make property public

        public int StartingPosition = 13;
        public int RacetrackLength = 420;
        public PictureBox MyPictureBox = null;
        public int Location = 0;
        public Random Randomizer;

        public void Run()
        {

            runner.pictureDog1.Location = new Point(13, 100);
        }      
    }
}

根据您提供的代码，未分配Form1或“runner”。
你有两个选择-
1） 像这样公开你的跑步者

public Form1 runner

这将允许您（在窗体中，而不是在类中）将窗体分配给此属性

public class Form1
{
        protected void Form1_Load(object sender, EventArgs e)
        {
              Greyhound gh = new Greyhound();
              gh.runner = this;//this line here
              //then you can call gh.Run()
        }
}

另一种选择是使用构造函数，如下所示-

class Greyhound
{

    Form1 runner;

    public int StartingPosition = 13;
    public int RacetrackLength = 420;
    public PictureBox MyPictureBox = null;
    public int Location = 0;
    public Random Randomizer;

    //here
    public Greyhound(Form1 form)
    {
        this.runner = form;
    }
    public void Run()
    {

        runner.pictureDog1.Location = new Point(13, 100);
    }     
}

这将把表单传递到greyhound类中，供您访问，然后在表单代码中-

public class Form1
{
        protected void Form1_Load(object sender, EventArgs e)
        {
              Greyhound gh = new Greyhound(this);//pass the form as 'this'
              //then you can call gh.Run()
        }
}

编辑：
基于您提供的表单代码-

namespace RaceGame
{
    public partial class Form1 : Form
    {
         Greyhound racing = new Greyhound();
         public Form1()
         {
            InitializeComponent();
         }

         private void raceButton_Click(object sender, EventArgs e)
         {
              racing.runner = this;//assign property here
              racing.Run();
         }
    }
}

还有灰狗班

namespace RaceGame
{
    class Greyhound 
    {

        public Form1 runner;//make property public

        public int StartingPosition = 13;
        public int RacetrackLength = 420;
        public PictureBox MyPictureBox = null;
        public int Location = 0;
        public Random Randomizer;

        public void Run()
        {

            runner.pictureDog1.Location = new Point(13, 100);
        }      
    }
}

你能展示一下你的灰狗课程的初始化吗？这是学校的项目吗？！不，我只是想建立一个赛车场，你能展示一下你的灰狗类的初始化吗？这是学校的项目吗？！不，我只是想建立一个赛车游戏