ControlCollection.Contains(Control) ControlCollection.Contains(Control) ControlCollection.Contains(Control) ControlCollection.Contains(Control) Method

Определение

Определяет наличие указанных серверных элементов управления в объекте ControlCollection родительского серверного элемента управления.Determines whether the specified server control is in the parent server control's ControlCollection object.

public:
 virtual bool Contains(System::Web::UI::Control ^ c);
public virtual bool Contains (System.Web.UI.Control c);
abstract member Contains : System.Web.UI.Control -> bool
override this.Contains : System.Web.UI.Control -> bool
Public Overridable Function Contains (c As Control) As Boolean

Параметры

c
Control Control Control Control

Серверный элемент управления, который требуется найти в коллекции.The server control to search for in the collection.

Возвраты

Значение true, если указанный серверный элемент управления присутствует в коллекции; в противном случае — значение false.true if the specified server control exists in the collection; otherwise, false.

Примеры

// Create an event handler that uses the 
// ControlCollection.Contains method to verify
// the existence of a Radio3 server control in
// the ControlCollection of the myForm server control.
// When a user clicks the button associated
// with this event handler, Radio3 is removed
// from the collection.
void RemoveBtn_Click(Object sender, EventArgs e){
    if (myForm.Controls.Contains(Radio3))
    { 
       myForm.Controls.Remove(Radio3);
    }
}
     ' Create an event handler that uses the 
     ' ControlCollection.Contains method to verify
     ' the existence of a Radio3 server control in
     ' the ControlCollection of the myForm server control.
     ' When a user clicks the button associated
     ' with this event handler, Radio3 is removed
     ' from the collection.
Sub RemoveBtn_Click(sender As [Object], e As EventArgs)
      If myForm.Controls.Contains(Radio3) Then
           myForm.Controls.Remove(Radio3)
      End If
End Sub 'RemoveBtn_Click

Применяется к

Дополнительно