公共自定義事件在用戶控件

Question

我想這一點：

public partial class ucTest : UserControl 
{ 
... 
SomeEvent { MessageBox.Show("Inner Call") } 
} 


public partial class frmTest: Form 
{ 
... 
SomeEvent += OuterEventInstance; 
... 
void OuterEventInstance(object sender, EventArgs e) 
{ MessageBox.Show("Inner Call") } 
... 
} 

我如何可以在包含該用戶控件的實例的形式是可用的（和可擴展）用戶控件定義的公共事件？

Answer 1

事情是這樣的：

public partial class ucTest : UserControl 
{ 
    public event EventHandler SomeEvent; 

    private void OnSomeEvent() 
    { 
     EventHandler handler = SomeEvent; 
     if(handler != null) 
      handler(this, EventArgs.Empty); 
    } 

} 


public partial class frmTest: Form 
{ 
    public frmTest() 
    { 
     ucTest uc = new ucTest(); 
     uc.SomeEvent += OuterEventInstance; 
    } 

    //... 

    void OuterEventInstance(object sender, EventArgs e) 
    { 
     MessageBox.Show("Inner Call") 
     //... 
    } 
}