ToolBar.ToolBarButtonCollection.Contains(ToolBarButton) Metode

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

ToolBar.ToolBarButtonCollection.cs

Menentukan apakah tombol toolbar yang ditentukan adalah anggota koleksi.

public:
 bool Contains(System::Windows::Forms::ToolBarButton ^ button);

public bool Contains(System.Windows.Forms.ToolBarButton button);

member this.Contains : System.Windows.Forms.ToolBarButton -> bool

Public Function Contains (button As ToolBarButton) As Boolean

Parameter

button

ToolBarButton

untuk ToolBarButton menemukan dalam koleksi.

Mengembalikan

Boolean

true ToolBarButton jika adalah anggota koleksi; jika tidak, false.

Contoh

Contoh kode berikut menghapus yang ada ToolBarButton dari ToolBar kontrol jika ada dan menambahkan dan menyisipkan empat objek baru ToolBarButton ke ToolBar. Contoh ini mengharuskan Anda memiliki Form dengan ToolBar kontrol di atasnya.

void AddToolbarButtons( ToolBar^ toolBar )
{
   if (  !toolBar->Buttons->IsReadOnly )
   {
      
      // If toolBarButton1 in in the collection, remove it.
      if ( toolBar->Buttons->Contains( toolBarButton1 ) )
      {
         toolBar->Buttons->Remove( toolBarButton1 );
      }
      
      // Create three toolbar buttons.
      ToolBarButton^ tbb1 = gcnew ToolBarButton( "tbb1" );
      ToolBarButton^ tbb2 = gcnew ToolBarButton( "tbb2" );
      ToolBarButton^ tbb3 = gcnew ToolBarButton( "tbb3" );
      
      // Add toolbar buttons to the toolbar.
      array<ToolBarButton^>^buttons = {tbb2,tbb3};
      toolBar->Buttons->AddRange( buttons );
      toolBar->Buttons->Add( "tbb4" );
      
      // Insert tbb1 into the first position in the collection.
      toolBar->Buttons->Insert( 0, tbb1 );
   }
}

private void AddToolbarButtons(ToolBar toolBar)
{
   if(!toolBar.Buttons.IsReadOnly)
   {
      // If toolBarButton1 in in the collection, remove it.
      if(toolBar.Buttons.Contains(toolBarButton1))
      {
         toolBar.Buttons.Remove(toolBarButton1);
      }
    
      // Create three toolbar buttons.
      ToolBarButton tbb1 = new ToolBarButton("tbb1");
      ToolBarButton tbb2 = new ToolBarButton("tbb2");
      ToolBarButton tbb3 = new ToolBarButton("tbb3");
      
      // Add toolbar buttons to the toolbar.		
      toolBar.Buttons.AddRange(new ToolBarButton[] {tbb2, tbb3});
      toolBar.Buttons.Add("tbb4");
    
      // Insert tbb1 into the first position in the collection.
      toolBar.Buttons.Insert(0, tbb1);
   }
}

Private Sub AddToolbarButtons(toolBar As ToolBar)
   If Not toolBar.Buttons.IsReadOnly Then
      ' If toolBarButton1 in in the collection, remove it.
      If toolBar.Buttons.Contains(toolBarButton1) Then
         toolBar.Buttons.Remove(toolBarButton1)
      End If

      ' Create three toolbar buttons.
      Dim tbb1 As New ToolBarButton("tbb1")
      Dim tbb2 As New ToolBarButton("tbb2")
      Dim tbb3 As New ToolBarButton("tbb3")

      ' Add toolbar buttons to the toolbar.		
      toolBar.Buttons.AddRange(New ToolBarButton() {tbb2, tbb3})
      toolBar.Buttons.Add("tbb4")

      ' Insert tbb1 into the first position in the collection.
      toolBar.Buttons.Insert(0, tbb1)
   End If
End Sub

Keterangan

Metode ini memungkinkan Anda menentukan apakah adalah ToolBarButton anggota koleksi sebelum mencoba melakukan operasi pada ToolBarButton. Anda dapat menggunakan metode ini untuk mengonfirmasi bahwa ToolBarButton telah ditambahkan atau masih menjadi anggota koleksi.