从另一个窗体调用一个方法 [英] Call a method from another form

问题描述

我尝试调用从另一种形式的方法。我尝试：

I try to call a method from another form. My try:

public partial class newLedPopUp : Form
{
    Form1 back = new Form1();
    back.output();
    Close();
}

和

public partial class Form1 : Form
{
    newLedPopUp popup = new newLedPopUp();

    public void output()
    {
        button3_Click(null, null);
    }
}

有人可以帮我吗？我真的找不到我的错误，我一直在寻找了很长的时间。

Can somebody help me? I really can't find my error and I've been looking for a very long time.

推荐答案

而不是创建一个新的窗体的实例，你可能需要已经打开窗体的实例，并从那里调用该方法。你可以试试：

Instead of creating an instance of a new Form, you probably need an instance of already opened form and call the method from there. You can try:

if (System.Windows.Forms.Application.OpenForms["yourForm"] != null)
    {
        (System.Windows.Forms.Application.OpenForms["yourForm"] as Form1).Output();
    }

再加上你可以（NULL，NULL）在输出方法，通过将$替换调用 button3_Click在一个单独的方法事件的C $ c和然后调用对你的按钮点击事件或公共输出方式

plus you can replace calling the button3_Click(null,null) in your Output method, by placing the code of the event in a separate method and then calling that method against your button click event or your public output method

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