Question

class game_rule
{
    public void DoAttack()
    {
        Form1 prgBar = new Form1();
        prgBar.progressBar1.Increment(-200);
        SystemSounds.Asterisk.Play();
    }
}

但是下面的代码（来自form1-direct）工作。

public partial class Form1 : Form
{
  game_rule dt = new game_rule();
  private void button2_Click(object sender, EventArgs e)
  {
    progressBar1.Increment(-200); // this is work
    dt.DoAttack(); // this is not work... but there is no build error at all!
  }
}

编辑问题： form form1 "progressBar1.Increment(-200);"正在使用来自类game_rule的prgBar.progressBar1.Increment(-200);，而不是“dt.DoAttack（）;”

Answer 1

prgBar.Show()

这是你需要的吗？你忘了展示新表格吗？

编辑：

我正在回复你的评论...

您需要一个静态属性才能从其他地方访问该表单：

public partial class Form1 : Form
{
  // This is you constructor (not shown in your sample code).
  public Form1()
  {
    InitializeComponent();
    Instance = this;
  }

  public static Form1 Instance { get; private set;}

  game_rule dt = new game_rule();
  private void button2_Click(object sender, EventArgs e)
  {
    progressBar1.Increment(-200); // this is work
    dt.DoAttack(); // this is not work... but there is no build error at all!
  }
}


class game_rule
{
    public void DoAttack()
    {
        Form1.Instance.progressBar1.Increment(-200);
        SystemSounds.Asterisk.Play();
    }
}

或其他方法可能是依赖注入（不是一个完美的方法，但它是一个良好的开端）：

public partial class Form1 : Form
{

  game_rule dt = new game_rule();
  private void button2_Click(object sender, EventArgs e)
  {
    progressBar1.Increment(-200); // this is work
    dt.DoAttack(this); // this is not work... but there is no build error at all!
  }
}


class game_rule
{        
    public void DoAttack(Form1 form)
    {
        form1.progressBar1.Increment(-200);
        SystemSounds.Asterisk.Play();
    }
}

程序成功没有错误，但此方法不起作用

1 个答案: