【原】子窗体传值给父窗体

源程序：https://files.cnblogs.com/gebenhagen/%e5%ad%90%e7%aa%97%e4%bd%93%e4%bc%a0%e5%80%bc%e7%bb%99%e7%88%b6%e7%aa%97%e4%bd%93.rar

父窗体代码

using System;
using System.Windows.Forms;

namespace 子窗体传值给父窗体
{
    public partial class formFather : Form
    {
        public formFather()
        {
            InitializeComponent();
        }
        //封装一个属性
        public string str { get; set; }
        private void button1_Click(object sender, EventArgs e)
        {
            formSun sun = new formSun();//实例化子窗体
            sun.Owner = this;//指定子窗体的父窗体
            sun.ShowDialog();//弹出子窗体
            this.label1.Text = str;//给label1赋值
        }
    }
}

子窗体的代码

using System;
using System.Windows.Forms;

namespace 子窗体传值给父窗体
{
    public partial class formSun : Form
    {
        public formSun()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            formFather Father = (formFather)this.Owner;//实例化父窗体，但这里的实例化有些不一样哦，
            Father.str = this.textBox1.Text;//把text里的值赋值给父窗体中的str属性
            this.Close();//关闭子窗体本身
        }
    }
}