用委托来实现子窗体操作父窗体中的控件

代码实现

Form1中，一个Lable1;在Form2中控制Form1中的Lable1的显示或隐藏!


Form1代码：

namespace WindowsApplication2{ public delegate void SetVisiableHandler(); public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Form2 frm = new Form2(new SetVisiableHandler(SetVisiable)); frm.Show(); } private void SetVisiable() { SetVisiable(this.label1, !this.label1.Visible); } private void SetVisiable(Control control, bool visiable) { if (this.Controls.Contains(control)) { control.Visible = visiable; } } }}

Form2代码

namespace WindowsApplication2{ public partial class Form2 : Form { private SetVisiableHandler m_setVisible; public Form2(SetVisiableHandler setvisible) { InitializeComponent(); this.m_setVisible = setvisible; } private void btnVisible_Click(object sender, EventArgs e) { if (this.m_setVisible != null) { this.m_setVisible(); } } }}