C# WinForm 父窗体 子窗体 传值

     以前总是为了 窗体之间的值的传递而犯愁！弄的云里雾里~许多参考书也说不清楚！今天看到一篇文章，作者以其犀利的代码，清晰的思考，帮我彻底解脱！担心以后会忘掉，赶紧先copy下来！ 非常好用的~

以下版权归作者所有：详细http://www.cnblogs.com/freeliver54/archive/2009/02/11/1388173.html

======================================================================================

本次示例效果如下：

Form1为父窗体(包含textBox1、button1)

Form2为子窗体(包含textBox2、button2)

父窗体给子窗体传值

==================

1.点击Form1的button1 打开Form2

  父窗体给子窗体传值 可以调用重载子窗体的构造函数 直接传入相关数值

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form2 frm2 = new Form2(this.textBox1.Text);

            frm2.Show();

        }

    }

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

        }

        public Form2(string strTextBox1Text)

        {

            InitializeComponent();

            this.textBox2.Text = strTextBox1Text;

        }

    }

2.点击Form1的button1 打开Form2

  并调用子窗体Form2的公开属性或方法 将Form1的textBox1的值设置给Form2的textBox2

 

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form2 frm2 = new Form2();

            frm2.TextBox2Text = this.textBox1.Text;

            frm2.Show();

        }

    }

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

        }

        public string TextBox2Text

        {

            set { this.textBox2.Text = value; }

            get { return this.textBox2.Text; }

        }      

    }

 

3.点击Form1的button1 打开Form2

  在Form2_Load调用父窗体Form1的公开属性或方法 将Form1的textBox1的值设置给Form2的textBox2

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        public string TextBox1Text

        {

            set { this.textBox1.Text = value; }

            get { return this.textBox1.Text;  }

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form2 frm2 = new Form2();

            frm2.Show(this);//或 frm2.ShowDialog(this);

            ////或者

            //Form2 frm2 = new Form2();

            //frm2.Owner = this;

            //frm2.Show();//或 frm2.ShowDialog();

        }

    }

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

        }

        private void Form2_Load(object sender, EventArgs e)

        {

            Form1 frm1 = (Form1)this.Owner;

            this.textBox2.Text = frm1.TextBox1Text;

        }

    }

子窗体给父窗体传值

==================

4.点击Form1的button1 打开Form2

  再点击Form2的button2

    在button2_Click事件中 通过this.Owner将Form2的textBox2的值设置给Form1的textBox1

    并关闭Form2

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form2 frm2 = new Form2();

            frm2.Show(this);//或 frm2.ShowDialog(this);

            ////或者

            //Form2 frm2 = new Form2();

            //frm2.Owner = this;

            //frm2.Show();//或 frm2.ShowDialog();

        }

    }

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            Form1 frm1 = (Form1)this.Owner;

     //注意 如果textBox1是放在panel1中的 则先找panel1 再找textBox1

            ((TextBox)frm1.Controls["textBox1"]).Text = this.textBox2.Text;

            this.Close();

        }

    }

5.点击Form1的button1 打开Form2

  再点击Form2的button2

    在button2_Click事件中 通过this.Owner及调用父窗体Form1的公开属性或方法

                          将Form2的textBox2的值设置给Form1的textBox1

    并关闭Form2

 

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        public string TextBox1Text

        {

            set { this.textBox1.Text = value; }

            get { return this.textBox1.Text;  }

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form2 frm2 = new Form2();

            frm2.Show(this);//或 frm2.ShowDialog(this);

            ////或者

            //Form2 frm2 = new Form2();

            //frm2.Owner = this;

            //frm2.Show();//或 frm2.ShowDialog();

        }

    }

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            Form1 frm1 = (Form1)this.Owner;

            frm1.TextBox1Text = this.textBox2.Text;

            this.Close();

        }

    }