C＃從父容器和列表中刪除控件

Question

我有2個控件繼承UserControl 一個是一個容器，另一個是基本文本框標籤的集合，因此標記爲ContainerControl和ComboControl。

ContainerControl包含一個List<ComboControl>和一個foreach循環，將它們添加到FlowLayoutPanel。 ComboControl有一個按鈕，我想用它來清除自己的父母的列表。

我不知道這樣做的最佳方式是什麼。 this.parent並投到ContainerControl或Dispose()工作？我相當肯定，我可以一個引用傳遞到List，但聽起來不必要的凌亂...

public partial class ContainerControl : UserControl 
{ 
    List<ComboControl> ComboControls = new List<ComboControl>(); 
    ... 
    //procederaly generate and fill ComboControls here 
    ... 
    foreach (ComboControl value in ComboControls) 
    { 
     this.flowLayoutTable.Controls.Add(value); 
    } 
... 
} 

public partial class ComboControl : UserControl 
{ 
    private void BtnDel_Click(object sender, EventArgs e) 
    { 
     //what goes here 
    } 
... 
} 

Answer 1

沿着什麼Zohar Peled說，像這樣刪除控制，以避免泄漏資源的線條。

private void cleanup(Control c) 
{   
    foreach(Control child in c.Controls)   
     cleanup(child);   

    if (c.Parent != null) 
    { 
     c.Parent.Controls.Remove(c); 
     c.Dispose(); 
    } 
} 

Answer 2

對於方案這樣我會用一個自定義事件發送刪除請求於母公司控制：

您ComboControl與自定義事件：

//Create Custom Event 
    public delegate void DeleteControlDelegate(object sender); 

    public partial class ComboControl : UserControl 
    { 
     //Custom Event to send Delete request 
     public event DeleteControlDelegate DeleteControlDelegate; 

     public ComboControl() 
     { 
      InitializeComponent(); 
     } 

     //Invoke Custom Event 
     private void OnDeleteControl(object sender) 
     { 
      DeleteControlDelegate?.Invoke(sender); 
     } 

     private void BtnDel_Click(object sender, EventArgs e) 
     { 
      //On ButtonClick send Delete request 
      OnDeleteControl(this); 
     } 
    } 

，並在一個ContainerControl預訂事件每個ComboControl：

List<ComboControl> _comboControls = new List<ComboControl>(); 

     public ContainerControl() 
     { 
      InitializeComponent(); 
     } 

     private void ContainerControl_Load(object sender, EventArgs e) 
     { 
      _comboControls.Add(new ComboControl()); 
      _comboControls.Add(new ComboControl()); 
      _comboControls.Add(new ComboControl()); 

      foreach (ComboControl value in _comboControls) 
      { 
       flowLayoutPanel.Controls.Add(value); 
       //Subscribe to Custom Event here 
       value.DeleteControlDelegate += Value_DeleteControlDelegate; 
      } 
     } 

     private void Value_DeleteControlDelegate(object sender) 
     { 
      //When Raised Delete ComboControl 
      flowLayoutPanel.Controls.Remove((Control) sender); 
     } 
    }