引用父窗體到子窗體

Question

我創建了一個ParentForm。從ParentForm的菜單上，我從ChildForm菜單項創建一個ChildForm。當創建ChildForm時，我將ParentForm上的Childform菜單項設置爲禁用。 當我們關閉ChildForm時，我必須設置和引用ParentForm 上的ChildForm菜單項。

感謝

塔馬斯

Answer 1

public partial class myParent : Form { 
     ... 
     ... 
     public myParent { 
      initChildren(); 
     } 
     void initiChildren() { 
      myChildAlpha = new ChildForm(); 
      myChildAlpha.FormClosed += new FormClosedEventHandler(enable_menu)  
     } 
     void enable_menu(object sender,FormClosedEventArgs e) { 
      //check if sender == ChildForm -> if so enable the proper menu 
     } 
} 

Answer 2

ParentForm form; 
    public ChildForm(ParentForm _form) //pass ParentForm as Parameter 
    { 
     InitializeComponent(); 
     form = _form; //save Parameter to variable form 
    } 
    //raised when Form was closed 
    private void ChildForm_FormClosed(object sender, FormClosedEventArgs e) 
    { 
     //set item to public modifier in properties window or specify getter and setter, then you can set it set it to enabled again like this 
     //Pseudo: form.menu.item.enabled = true; 
    } 
    //create Instance of ChildForm like this "ChildForm child = new ChildForm(this);"