Control.Contains(Control) 方法

定義

擷取指示控制項是否為控制項的子控制項的值。Retrieves a value indicating whether the specified control is a child of the control.

public:
 bool Contains(System::Windows::Forms::Control ^ ctl);
public bool Contains (System.Windows.Forms.Control ctl);
member this.Contains : System.Windows.Forms.Control -> bool
Public Function Contains (ctl As Control) As Boolean

參數

ctl
Control

要評估的 ControlThe Control to evaluate.

傳回

如果指定的控制項是控制項的子控制項,則為 true,否則為 falsetrue if the specified control is a child of the control; otherwise, false.

範例

下列程式碼範例會藉由呼叫其 BringToFront 方法,確保可以看見 LabelThe following code example ensures that a Label is visible by calling its BringToFront method. 這個範例需要您具有名為 panel1PanelForm,以及名為 label1LabelThis example requires that you have a Form with a Panel named panel1, and a Label named label1.

private:
   void MakeLabelVisible()
   {
      
      /* If the panel contains label1, bring it
         * to the front to make sure it is visible. */
      if ( panel1->Contains( label1 ) )
      {
         label1->BringToFront();
      }
   }
private void MakeLabelVisible()
{
   /* If the panel contains label1, bring it 
   * to the front to make sure it is visible. */
   if(panel1.Contains(label1))
   {
      label1.BringToFront();
   }
}
Private Sub MakeLabelVisible()
   ' If the panel contains label1, bring it 
   ' to the front to make sure it is visible. 
   If panel1.Contains(label1) Then
      label1.BringToFront()
   End If
End Sub

適用於

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