1

我有一个简单的问题,我无法通过谷歌搜索任何解决方案:我想在运行时添加标签按钮文本框,我可以在我的表单的构造函数中,但我无法在构造函数之外访问它们。

像这样的东西:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        Label changeMe = new Label();
        changeMe.AutoSize = true;
        changeMe.Left = 50; changeMe.Top = 50;
        changeMe.Text = "Change this text from other function";
        changeMe.IsAccessible = true;

        //changeMe.Name = "changeMe";

        this.Controls.Add(changeMe);
    }

    private void btn_changeLabelText_Click(object sender, EventArgs e)
    {
        //Would like to achieve this:
        //changeMe.Text = "You changed me !! ";

        //But I found only this solution:
        //Label l;   l = (Label)this.Controls.Find("changeMe", true)[0];   l.Text = "You changed Me";

    }
}

我注释掉的解决方案是我找到的唯一一个,但我不敢相信没有比这更好的解决方案了。例如,有没有办法让我的控件公开?解决这个问题的好方法是什么?

(每次调用我要设计的对话框时,控件的数量都会有所不同)

谢谢

编辑 - - - - - - - - - - - - -

接受阿迪尔的回答后,我继续使用以下解决方案,我只发现它作为最初评价 this.Control.Find 的方式更好,因为我也想要“n”个文本框,这样我可以轻松地循环它们并读取输入。

    public partial class Form1 : Form
{
    public struct labels { public Label lbl; public int id; }
    List<labels> lbls = new List<labels>();

    public Form1()
    {
        InitializeComponent();
        Label changeMe = new Label();
        changeMe.AutoSize = true;
        changeMe.Left = 50; changeMe.Top = 50;
        changeMe.Text = "Change this text from other function";
        changeMe.IsAccessible = true;


        this.Controls.Add(changeMe);
        labels newlabel = new labels();
        newlabel.id = 137; newlabel.lbl = changeMe;
        lbls.Add(newlabel);

    }

    private void btn_changeLabelText_Click(object sender, EventArgs e)
    {
        lbls.Find(i => i.id == 137).lbl.Text = "You changed me";
    }
}
4

1 回答 1

4

您在构造函数中声明了标签,使其只能在构造函数中访问,将外部构造函数声明labelclass scope类成员。

Label changeMe = new Label();

public Form1()
{
    InitializeComponent();
    Label changeMe = new Label();
    changeMe.AutoSize = true;
    changeMe.Left = 50; changeMe.Top = 50;
    changeMe.Text = "Change this text from other function";
    changeMe.IsAccessible = true;

    //changeMe.Name = "changeMe";

    this.Controls.Add(changeMe);
}
于 2012-12-02T16:08:05.663 回答