Résumé du transfert de valeur entre les formulaires C#

FormChild fc = new FormChil();//新建一个子窗体
fc.ShowDialog(this);//以上两句即实现了子窗体和父窗体的联系
textBox2.Text = fc.Str1;//已实现联系，可以传值

   FormParent fp = (FormParent)this.Owner;//实现联系
     textBox1.Text = fp.Str1;//已实现联系，可以传值

using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace TestTransValue
{    public partial class Form1 : Form
    {        private string form1Text;        
    public string Form1Text
        {            get { return form1Text; }            
        set { form1Text = value; }
        }        public Form1()
        {
            InitializeComponent();
            form1Text = "这是来自Form1的Text";
        }        private void Form1_Load(object sender, EventArgs e)
        {
            
        }        private void button1_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            f2.ShowDialog(this);
            textBox1.Text = f2.Form2Text;//以上三句即可实现从子窗体向父窗体的传值        }        
            private void button2_Click(object sender, EventArgs e)
        {
            Form3 f3 = new Form3(this);
            f3.ShowDialog(this);
            textBox2.Text = f3.Form3Text;//以上三句即可实现从子窗体向父窗体的传值        }
    }
}

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace TestTransValue
{    public partial class Form2 : Form
    {        private string form2Text = "这是来自form2的Text";        public string Form2Text
        {            get { return form2Text; }            set { form2Text = value; }
        }        public Form2()
        {
            InitializeComponent();      
        }        private void Form2_Load(object sender, EventArgs e)
        {
            
        }        private void button1_Click(object sender, EventArgs e)
        {
            Form1 f1 = (Form1)this.Owner;
            textBox1.Text = f1.Form1Text;//以上两句即可实现子窗体获取父窗体的值（需要在父窗体中声明）        }
    }
}

using System;using 
System.Collections.Generic;using 
System.ComponentModel;using System.Data;using 
System.Drawing;using System.Linq;using 
System.Text;using System.Windows.Forms;namespace TestTransValue
{    public partial class Form3 : Form
    {        private string form3Text = "这是来自form3的Text";
        Form1 f1;        public string Form3Text
        {            get { return form3Text; }            
        set { form3Text = value; }
        }        public Form3(Form1 form1)
        {
            InitializeComponent();
            f1 = form1;
        }        private void Form3_Load(object sender, EventArgs e)
        {
        }        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text = f1.Form1Text;
        }
    }
}