实现子窗口到主窗口的传值

在子窗口的两个textbox输入字符串后，他们的内容将会显示在主窗口的textbox上。

子窗口的控件：两个textbox，两个button

子窗口：

 

 

namespace sign_in
{
    public partial class Child : Form
    {
        private string c_no;
        private string c_name;
        
        public string c_No
        {
            get
            {
                return this.c_no;
            }
            set
            {
                this.c_no = value;
            }
        }

        public string c_Name
        {
            get
            {
                return this.c_name;
            }
            set
            {
                this.c_name = value;
            }
        }

        private MainForm mainform;    //创建一个主窗口对象

        public child()
        {
            InitializeComponent();
        }

        private void Child_Load(object sender, EventArgs e)
        {
            mainform = (MainForm)this.Owner;     //窗口间传值keypoint
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.no = this.textBox1.Text;
            this.name = this.textBox2.Text;
            this.DialogResult = DialogResult.OK;
            this.Close();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Dispose();
        }
    }
}

 

 

 

主窗口控件：两个textbox，一个button

主窗口：

 

 

namespace sign_in
{
    public partial class MainForm : Form
    {
        private string f_no;
        private string f_name;

        public string f_No
        {
            get
            {
                return this.f_no;
            }
            set
            {
                this.f_no = value;
            }
        }

        public string f_Name
        {
            get
            {
                return this.f_name;
            }
            set
            {
                this.f_name = value;
            }
        }

        public MainForm()
        {
            InitializeComponent();            
        }

       private void button1_Click(object sender, EventArgs e)
        {
            Child child = new Child();
            if (child.ShowDialog() == DialogResult.OK)
            {
                this.textBox1.Text = child.c_No;
                this.textBox2.Text = child.c_Name;
            }
        }
    }
}