如何打开新表格，传递参数并返回参数 [英] How to open new form, pass parameter and return parameter back

问题描述

在我的应用程序中，我打开新表格:

In my application i open new form:

private void button1_Click(object sender, EventArgs e)
{
    Form2 = new Form2 ("bla bla");
    Form2 .ShowDialog();
}

这是我要打开的表格，想传回参数:

This is my form that i am opening and want to pass back parameter:

public partial class Form2: Form
{
    public Form2 (string file)
    {
        InitializeComponent();
    }
}

推荐答案

您可以定义要在Form2中返回并在Form1中访问它们的公共变量:

You can define public variables which want to return in Form2 and access them in Form1:

public partial class Form2: Form
{
    public int x;    //can be private too
    public string y; //can be private too

    public Form2 (string file)
    {
        InitializeComponent();
    }

    //define some function which changes defined global values
}

在Form1中:

Form2 form2 = new Form2("bla bla");
form2.ShowDialog();
MessageBox.Show(form2.x.ToString());
MessageBox.Show(form2.y);

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