Form.StartPosition Form.StartPosition Form.StartPosition Form.StartPosition Property

定義

実行時にフォームの開始位置を取得または設定します。Gets or sets the starting position of the form at run time.

public:
 property System::Windows::Forms::FormStartPosition StartPosition { System::Windows::Forms::FormStartPosition get(); void set(System::Windows::Forms::FormStartPosition value); };
public System.Windows.Forms.FormStartPosition StartPosition { get; set; }
member this.StartPosition : System.Windows.Forms.FormStartPosition with get, set
Public Property StartPosition As FormStartPosition

プロパティ値

フォームの開始位置を表す FormStartPositionA FormStartPosition that represents the starting position of the form.

例外

指定された値が有効値の範囲内にありません。The value specified is outside the range of valid values.

次のコード例では、 Formの新しいインスタンスを作成し、 ShowDialogメソッドを呼び出してフォームをダイアログボックスとして表示します。The following code example creates a new instance of a Form and calls the ShowDialog method to display the form as a dialog box. この例ではFormBorderStyle AcceptButton StartPosition 、、、、およびの各プロパティを設定して、フォームの外観と機能をダイアログボックスに変更します。 CancelButtonThe example sets the FormBorderStyle, AcceptButton, CancelButton, and StartPosition properties to change the appearance and functionality of the form to a dialog box. また、この例でAddは、フォームのControlsコレクションのメソッドを使用Buttonして、2つのコントロールを追加します。The example also uses the Add method of the form's Controls collection to add two Button controls. この例ではHelpButton 、プロパティを使用して、ダイアログボックスのキャプションバーに [ヘルプ] ボタンを表示します。The example uses the HelpButton property to display a help button in the caption bar of the dialog box.

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 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 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 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 'CreateMyForm

注釈

このプロパティを使用すると、実行時にフォームが表示されるときの開始位置を設定できます。This property enables you to set the starting position of the form when it is displayed at run time. フォームの位置を手動で指定するには、 Locationプロパティを設定するか、Windows によって指定された既定の場所を使用します。The form's position can be specified manually by setting the Location property or use the default location specified by Windows. また、フォームを画面の中央または親フォームの中央に配置して、マルチドキュメントインターフェイス (MDI) 子フォームなどのフォームを表示することもできます。You can also position the form to display in the center of the screen or in the center of its parent form for forms such as multiple-document interface (MDI) child forms.

フォームが表示される前に、このプロパティを設定する必要があります。This property should be set before the form is shown. このプロパティは、 Show ShowDialogメソッド、メソッド、またはフォームのコンストラクターで呼び出す前に設定できます。You can set this property before you call the Show or ShowDialog method or in your form's constructor.

適用対象

こちらもご覧ください