C#簡單實現子窗體向父窗體傳值的方法

點擊Form1的button1 打開Form2
再點擊Form2的button2

在button2_Click事件中 通過this.Owner將Form2的textBox2的值設置給Form1的textBox1
並關閉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 則先找panel1 再找textBox1
((TextBox)frm1.Controls["textBox1"]).Text = this.textBox2.Text;
this.Close();
}
}

點擊Form1的button1 打開Form2
再點擊Form2的button2
在button2_Click事件中 通過this.Owner及調用父窗體Form1的公開屬性或方法

將Form2的textBox2的值設置給Form1的textBox1
並關閉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();
}
}