Form.HelpButton Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Mendapatkan atau mengatur nilai yang menunjukkan apakah tombol Bantuan harus ditampilkan dalam kotak caption formulir.

public:
 property bool HelpButton { bool get(); void set(bool value); };

public bool HelpButton { get; set; }

member this.HelpButton : bool with get, set

Public Property HelpButton As Boolean

Nilai Properti

Boolean

trueuntuk menampilkan tombol Bantuan di bilah caption formulir; jika tidak, false. Default adalah false.

Contoh

Contoh berikut membuat instans Form baru dan memanggil ShowDialog metode untuk menampilkan formulir sebagai kotak dialog. Contoh mengatur FormBorderStyleproperti , , AcceptButtonCancelButton, MinimizeBox, MaximizeBox, dan StartPosition untuk mengubah tampilan dan fungsionalitas formulir menjadi kotak dialog. Contohnya juga menggunakan Add metode koleksi formulir Controls untuk menambahkan dua Button kontrol. Contoh menggunakan HelpButton properti untuk menampilkan tombol Bantuan di bilah caption kotak dialog.

public:
   void CreateMyForm()
   {
      // Create a new instance of the form.
      Form^ form1 = gcnew Form;
      // Create two buttons to use as the accept and cancel buttons.
      Button^ button1 = gcnew Button;
      Button^ button2 = gcnew Button;
      
      // Set the text of button1 to "OK".
      button1->Text = "OK";
      // Set the position of the button on the form.
      button1->Location = Point(10,10);
      // Set the text of button2 to "Cancel".
      button2->Text = "Cancel";
      // Set the position of the button based on the location of button1.
      button2->Location =
         Point( button1->Left, button1->Height + button1->Top + 10 );
      // Set the caption bar text of the form.   
      form1->Text = "My Dialog Box";
      // Display a help button on the form.
      form1->HelpButton = true;
      
      // Define the border style of the form to a dialog box.
      form1->FormBorderStyle = ::FormBorderStyle::FixedDialog;
      // Set the MaximizeBox to false to remove the maximize box.
      form1->MaximizeBox = false;      
      // Set the MinimizeBox to false to remove the minimize box.
      form1->MinimizeBox = false;
      // Set the accept button of the form to button1.
      form1->AcceptButton = button1;
      // Set the cancel button of the form to button2.
      form1->CancelButton = button2;
      // Set the start position of the form to the center of the screen.
      form1->StartPosition = FormStartPosition::CenterScreen;
      
      // Add button1 to the form.
      form1->Controls->Add( button1 );
      // Add button2 to the form.
      form1->Controls->Add( button2 );
      // Display the form as a modal dialog box.
      form1->ShowDialog();
   }

public void CreateMyForm()
{
   // Create a new instance of the form.
   Form form1 = new Form();
   // Create two buttons to use as the accept and cancel buttons.
   Button button1 = new Button ();
   Button button2 = new Button ();
  
   // Set the text of button1 to "OK".
   button1.Text = "OK";
   // Set the position of the button on the form.
   button1.Location = new Point (10, 10);
   // Set the text of button2 to "Cancel".
   button2.Text = "Cancel";
   // Set the position of the button based on the location of button1.
   button2.Location
      = new Point (button1.Left, button1.Height + button1.Top + 10);
   // Set the caption bar text of the form.   
   form1.Text = "My Dialog Box";
   // Display a help button on the form.
   form1.HelpButton = true;

   // Define the border style of the form to a dialog box.
   form1.FormBorderStyle = FormBorderStyle.FixedDialog;
   // Set the MaximizeBox to false to remove the maximize box.
   form1.MaximizeBox = false;
   // Set the MinimizeBox to false to remove the minimize box.
   form1.MinimizeBox = false;
   // Set the accept button of the form to button1.
   form1.AcceptButton = button1;
   // Set the cancel button of the form to button2.
   form1.CancelButton = button2;
   // Set the start position of the form to the center of the screen.
   form1.StartPosition = FormStartPosition.CenterScreen;
   
   // Add button1 to the form.
   form1.Controls.Add(button1);
   // Add button2 to the form.
   form1.Controls.Add(button2);
   
   // Display the form as a modal dialog box.
   form1.ShowDialog();
}

Public Sub CreateMyForm()
    ' Create a new instance of the form.
    Dim form1 As New Form()
    ' Create two buttons to use as the accept and cancel buttons.
    Dim button1 As New Button()
    Dim button2 As New Button()
       
    ' Set the text of button1 to "OK".
    button1.Text = "OK"
    ' Set the position of the button on the form.
    button1.Location = New Point(10, 10)
    ' Set the text of button2 to "Cancel".
    button2.Text = "Cancel"
    ' Set the position of the button based on the location of button1.
    button2.Location = _
       New Point(button1.Left, button1.Height + button1.Top + 10)
    ' Set the caption bar text of the form.   
    form1.Text = "My Dialog Box"
    ' Display a help button on the form.
    form1.HelpButton = True
       
    ' Define the border style of the form to a dialog box.
    form1.FormBorderStyle = FormBorderStyle.FixedDialog
    ' Set the MaximizeBox to false to remove the maximize box.
    form1.MaximizeBox = False
    ' Set the MinimizeBox to false to remove the minimize box.
    form1.MinimizeBox = False
    ' Set the accept button of the form to button1.
    form1.AcceptButton = button1
    ' Set the cancel button of the form to button2.
    form1.CancelButton = button2
    ' Set the start position of the form to the center of the screen.
    form1.StartPosition = FormStartPosition.CenterScreen
       
    ' Add button1 to the form.
    form1.Controls.Add(button1)
    ' Add button2 to the form.
    form1.Controls.Add(button2)
       
    ' Display the form as a modal dialog box.
    form1.ShowDialog()
End Sub

Keterangan

Ketika properti ini diatur ke true, tombol kecil dengan tanda tanya muncul di bilah caption di sebelah kiri tombol Tutup. Anda dapat menggunakan tombol ini untuk menampilkan bantuan untuk aplikasi Anda. Anda dapat membuat penanganan aktivitas untuk acara untuk HelpRequested menampilkan informasi Bantuan kepada pengguna saat tombol Bantuan formulir diklik.

Untuk menampilkan tombol Bantuan, nilai properti formulir ControlBox harus , truenilai defaultnya. Properti ControlBox menentukan apakah sudut kanan atas bilah caption berisi kontrol seperti tombol maksimalkan, tombol minimalkan, tombol bantuan, dan tombol tutup. Selain itu, Anda juga harus mengatur properti formulir FormBorderStyle ke , , FormBorderStyle.SizableFormBorderStyle.Fixed3D, atau FormBorderStyle.FixedDialogFormBorderStyle.FixedSingle.

Penting

Nilai HelpButton properti diabaikan jika tombol Maksimalkan atau Minimalkan ditampilkan.

Lihat juga

• MinimizeBox
• MaximizeBox
• ControlBox
• HelpButtonClicked