Control.Contains(Control) 方法

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

检索一个值，该值指示指定控件是否为一个控件的子控件。

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

参数

ctl

Control

要计算的 Control。

返回

Boolean

如果指定控件是控件的子控件，则为 true；否则为 false。

示例

下面的代码示例通过调用其 BringToFront 方法确保 Label 可见。 此示例要求具有一个名为 FormPanelpanel1的 和一个名为 Label 的 。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

另请参阅

• Contains(Control)
• Controls
• Parent