一个对象引用是所必需的非静态字段，方法或特性？ [英] An object reference is required for the non-static field, method, or property?

问题描述

我知道这可能是一个非常newbish的问题，所以我很抱歉。

我试图从另一种形式访问Form1上放置一个标签的Text属性，MaxScore。

当我点击MaxScore Ok按钮，我想用max.ToString（）来设置Form1的myGameCountLbl.Text到Form1的变量，最大

下面是我的code在MaxScore的OK按钮事件：

 私人无效okBtn_Click（对象发件人，EventArgs的发送）
{
    Form1.myGameCountLbl.Text = Form1.max.ToString（）;
    Form1.compGameCountLbl.Text = Form1.max.ToString（）;
}
 

但是，当我去编译它，我得到的错误：

  

需要一个对象引用非静态字段，方法或属性Towergame_2.Form1.myGameCountLbl

我得到Towergame_2.Form1.max和Towergame_2.Form1.compGameCountLbl同样的错误。

不太清楚如何解决这一问题。马克斯是一个公共变量和两个标签是耻骨为好。

谢谢！

这是我在构造函数中的code（谢谢你lassevk为code！）：

 公共Form1中（）
{
    //初始化瓦尔
    myHp = 100;
    compHp = 100;
    youWon = 0;
    compWon = 0;
    钱= 100;
    canCompAttack = TRUE;
    GAMEOVER = FALSE;    //显示HowToPlay对话
    HowToPlay howToPlay =新HowToPlay（）;
    howToPlay.ShowDialog（）;    使用（MaxScore maxScore =新MaxScore（））
    {
        maxScore.MainForm =这一点;
        maxScore.ShowDialog（）;
    }    的InitializeComponent（）;
}
 

解决方案

是任何机会Form1上类的名称？

您需要有表单类的一个实例的引用。

由于 okBtn 是不一样的形式，你需要给 MaxScore 形成一个参考的 Form1中实例。

例如，你可以将它添加到你的 MaxScore 的形式：

 公共Form1中的MainForm {搞定;组; }
 

然后在你的 okBtn_Click 方法，你会这样写：

 私人无效okBtn_Click（对象发件人，EventArgs的发送）
{
    MainForm.myGameCountLbl.Text = MainForm.max.ToString（）;
    MainForm.compGameCountLbl.Text = MainForm.max.ToString（）;
}
 

然后当你构建 MaxScore 从 Form1中（我假设这是你在做什么）：

 使用（MaxScore scoreForm =新MaxScore（））
{
    scoreForm.MainForm =这一点;
    scoreForm.ShowDialog（）;
}
 

I know this is probably a very newbish question, so I apologize.

I am trying to access the Text property of a label on Form1 from another form, MaxScore.

When I click the Ok button on MaxScore, I want to set Form1's myGameCountLbl.Text to Form1's variable, max by using max.ToString().

Here is my code in the OK button event of MaxScore:

private void okBtn_Click(object sender, EventArgs e)
{
    Form1.myGameCountLbl.Text = Form1.max.ToString();
    Form1.compGameCountLbl.Text = Form1.max.ToString();
}

But when I go to compile it, I get the error:

An object reference is required for the non-static field, method, or property 'Towergame_2.Form1.myGameCountLbl'

I get the same error for Towergame_2.Form1.max and Towergame_2.Form1.compGameCountLbl.

Not quite sure how to fix this. Max is a public variable and the two labels are pubic as well.

Thanks!

This is the code in my constructor (thank you lassevk for the code!):

public Form1()
{
    //initialize vars
    myHp = 100;
    compHp = 100;
    youWon = 0;
    compWon = 0;
    money = 100;
    canCompAttack = true;
    gameOver = false;

    //show HowToPlay Dialogue
    HowToPlay howToPlay = new HowToPlay();
    howToPlay.ShowDialog();

    using (MaxScore maxScore = new MaxScore())
    {
        maxScore.MainForm = this;
        maxScore.ShowDialog();
    }

    InitializeComponent();
}

解决方案

Is by any chance Form1 the name of the class?

You need to have a reference to an instance of the form class.

Since okBtn is not on the same form, you need to give the MaxScore form a reference to the Form1 instance.

For instance, you can add this to your MaxScore form:

public Form1 MainForm { get; set; }

And then in your okBtn_Click method, you'll write this:

private void okBtn_Click(object sender, EventArgs e)
{
    MainForm.myGameCountLbl.Text = MainForm.max.ToString();
    MainForm.compGameCountLbl.Text = MainForm.max.ToString();
}

and then when you're constructing MaxScore from Form1 (I'm assuming that's what you're doing):

using (MaxScore scoreForm = new MaxScore())
{
    scoreForm.MainForm = this;
    scoreForm.ShowDialog();
}

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