DesignerOptionService Classe

Definizione

public ref class DesignerOptionService abstract : System::ComponentModel::Design::IDesignerOptionService

public abstract class DesignerOptionService : System.ComponentModel.Design.IDesignerOptionService

type DesignerOptionService = class
    interface IDesignerOptionService

Public MustInherit Class DesignerOptionService
Implements IDesignerOptionService

Ereditarietà

Object

DesignerOptionService

Derivato

System.Windows.Forms.Design.WindowsFormsDesignerOptionService

Implementazioni

IDesignerOptionService

Esempio

Nell'esempio di codice seguente viene illustrato l'accesso DesignerOptionService a per visualizzare i valori correnti delle opzioni standard.

using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Data;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace DesignerOptionServiceExample
{
    // This control demonstrates retrieving the standard 
    // designer option service values in design mode.
    public class DesignerOptionServiceControl : System.Windows.Forms.UserControl
    {		
        private DesignerOptionService designerOptionSvc;

        public DesignerOptionServiceControl()
        {
            this.BackColor = Color.Beige;
                    this.Size = new Size(404, 135);
        }
        
        public override System.ComponentModel.ISite Site
        {
            get
            {
                return base.Site;
            }
            set
            {
                base.Site = value;

                // If siting component, attempt to obtain an DesignerOptionService.
                if( base.Site != null )                            
                    designerOptionSvc = (DesignerOptionService)this.GetService(typeof(DesignerOptionService));                                   
            }
        }

        // Displays control information and current DesignerOptionService 
        // values, if available.
        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            e.Graphics.DrawString("DesignerOptionServiceControl", 
                new Font("Arial", 9), 
                new SolidBrush(Color.Blue), 4, 4);

            if( this.DesignMode )
                e.Graphics.DrawString("Currently in design mode", 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 4, 18);
            else
                e.Graphics.DrawString("Not in design mode. Cannot access DesignerOptionService.", 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Red), 4, 18);
            
            if( base.Site != null && designerOptionSvc != null )
            {
                e.Graphics.DrawString("DesignerOptionService provides access to the table of option values listed when", 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 4, 38);

                e.Graphics.DrawString("the Windows Forms Designer\\General tab of the Tools\\Options menu is selected.", 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 4, 50);                
                
                e.Graphics.DrawString("Table of standard value names and current values", 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Red), 4, 76);
                
                // Displays a table of the standard value names and current values.
                int ypos = 90;

                // Obtains and shows the size of the standard design-mode grid square.
                PropertyDescriptor pd;
                pd = designerOptionSvc.Options.Properties["GridSize"];
                e.Graphics.DrawString("GridSize", 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 4, ypos);
                e.Graphics.DrawString(pd.GetValue(null).ToString(), 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 200, ypos);
                ypos += 12;

                // Uncomment the following code to demonstrate that this
                // alternate syntax works the same as the previous syntax.

                //pd = designerOptionSvc.Options["WindowsFormsDesigner"].Properties["GridSize"];
                //e.Graphics.DrawString("GridSize",
                //    new Font("Arial", 8),
                //    new SolidBrush(Color.Black), 4, ypos);
                //e.Graphics.DrawString(pd.GetValue(null).ToString(),
                //    new Font("Arial", 8),
                //    new SolidBrush(Color.Black), 200, ypos);
                //ypos += 12;

                //pd = designerOptionSvc.Options["WindowsFormsDesigner"]["General"].Properties["GridSize"];
                //e.Graphics.DrawString("GridSize",
                //    new Font("Arial", 8),
                //    new SolidBrush(Color.Black), 4, ypos);
                //e.Graphics.DrawString(pd.GetValue(null).ToString(),
                //    new Font("Arial", 8),
                //    new SolidBrush(Color.Black), 200, ypos);
                //ypos += 12;
                
                // Obtains and shows whether the design mode surface grid is enabled.
                pd = designerOptionSvc.Options.Properties["ShowGrid"];
                e.Graphics.DrawString("ShowGrid", 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 4, ypos);
                e.Graphics.DrawString(pd.GetValue(null).ToString(), 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 200, ypos);
                ypos+=12;
                
                // Obtains and shows whether components should be aligned with the surface grid.
                pd = designerOptionSvc.Options.Properties["SnapToGrid"];
                e.Graphics.DrawString("SnapToGrid", 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 4, ypos);
                e.Graphics.DrawString(pd.GetValue(null).ToString(), 
                    new Font("Arial", 8), 
                    new SolidBrush(Color.Black), 200, ypos);
                ypos += 12;

                // Obtains and shows which layout mode is selected.
                pd = designerOptionSvc.Options.Properties["LayoutMode"];
                e.Graphics.DrawString("LayoutMode",
                    new Font("Arial", 8),
                    new SolidBrush(Color.Black), 4, ypos);
                e.Graphics.DrawString(pd.GetValue(null).ToString(),
                    new Font("Arial", 8),
                    new SolidBrush(Color.Black), 200, ypos);
                ypos += 12;

                // Obtains and shows whether the Toolbox is automatoically
                // populated with custom controls and components.
                pd = designerOptionSvc.Options.Properties["AutoToolboxPopulate"];
                e.Graphics.DrawString("AutoToolboxPopulate",
                    new Font("Arial", 8),
                    new SolidBrush(Color.Black), 4, ypos);
                e.Graphics.DrawString(pd.GetValue(null).ToString(),
                    new Font("Arial", 8),
                    new SolidBrush(Color.Black), 200, ypos);
                ypos += 12;

                // Obtains and shows whether the component cache is used.
                pd = designerOptionSvc.Options.Properties["UseOptimizedCodeGeneration"];
                e.Graphics.DrawString("Optimized Code Generation",
                    new Font("Arial", 8),
                    new SolidBrush(Color.Black), 4, ypos);
                e.Graphics.DrawString(pd.GetValue(null).ToString(),
                    new Font("Arial", 8),
                    new SolidBrush(Color.Black), 200, ypos);
                ypos += 12;

                // Obtains and shows whether designer actions are automatically opened.
                pd = designerOptionSvc.Options.Properties["ObjectBoundSmartTagAutoShow"];
                e.Graphics.DrawString("Automatically Open Designer Actions",
                    new Font("Arial", 8),
                    new SolidBrush(Color.Black), 4, ypos);
                e.Graphics.DrawString(pd.GetValue(null).ToString(),
                    new Font("Arial", 8),
                    new SolidBrush(Color.Black), 200, ypos);
            }
        }
    }
}

Imports System.Collections
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.Data
Imports System.Windows.Forms
Imports System.Windows.Forms.Design


' This control demonstrates retrieving the standard 
' designer option service values in design mode.

Public Class DesignerOptionServiceControl
   Inherits System.Windows.Forms.UserControl
   Private designerOptionSvc As DesignerOptionService
   
   
   Public Sub New()
      Me.BackColor = Color.Beige
      Me.Size = New Size(404, 135)
    End Sub
   
   
   Public Overrides Property Site() As System.ComponentModel.ISite
      Get
         Return MyBase.Site
      End Get
      Set
         MyBase.Site = value
         
         ' If siting component, attempt to obtain an DesignerOptionService.
         If (MyBase.Site IsNot Nothing) Then
            designerOptionSvc = CType(Me.GetService(GetType(DesignerOptionService)), DesignerOptionService)
         End If
      End Set
   End Property
    
   ' Displays control information and current DesignerOptionService 
   ' values, if available.
   Protected Overrides Sub OnPaint(e As System.Windows.Forms.PaintEventArgs)
        e.Graphics.DrawString("DesignerOptionServiceControl", _
        New Font("Arial", 9), _
        New SolidBrush(Color.Blue), 4, 4)
      
      If Me.DesignMode Then
            e.Graphics.DrawString("Currently in design mode", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, 18)
      Else
            e.Graphics.DrawString("Not in design mode. Cannot access DesignerOptionService.", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Red), 4, 18)
      End If
      
      If (MyBase.Site IsNot Nothing) AndAlso (designerOptionSvc IsNot Nothing) Then
            e.Graphics.DrawString("DesignerOptionService provides access to the table of option values listed when", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, 38)

            e.Graphics.DrawString("the Windows Forms Designer\General tab of the Tools\Options menu is selected.", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, 50)

            e.Graphics.DrawString("Table of standard value names and current values", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Red), 4, 76)

            ' Displays a table of the standard value names and current values.
            Dim ypos As Integer = 90

            ' Obtains and shows the size of the standard design-mode grid square.
            Dim pd As PropertyDescriptor
            pd = designerOptionSvc.Options.Properties("GridSize")

            e.Graphics.DrawString("GridSize", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, ypos)

            e.Graphics.DrawString(pd.GetValue(Nothing).ToString(), _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 200, ypos)

            ypos += 12

            ' Uncomment the following code to demonstrate that this
            ' alternate syntax works the same as the previous syntax.
            'pd = designerOptionSvc.Options["WindowsFormsDesigner"].Properties["GridSize"];
            'e.Graphics.DrawString("GridSize",
            '    new Font("Arial", 8),
            '    new SolidBrush(Color.Black), 4, ypos);
            'e.Graphics.DrawString(pd.GetValue(null).ToString(),
            '    new Font("Arial", 8),
            '    new SolidBrush(Color.Black), 200, ypos);
            'ypos += 12;
            'pd = designerOptionSvc.Options["WindowsFormsDesigner"]["General"].Properties["GridSize"];
            'e.Graphics.DrawString("GridSize",
            '    new Font("Arial", 8),
            '    new SolidBrush(Color.Black), 4, ypos);
            'e.Graphics.DrawString(pd.GetValue(null).ToString(),
            '    new Font("Arial", 8),
            '    new SolidBrush(Color.Black), 200, ypos);
            'ypos += 12;

            ' Obtains and shows whether the design mode surface grid is enabled.
            pd = designerOptionSvc.Options.Properties("ShowGrid")

            e.Graphics.DrawString("ShowGrid", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, ypos)

            e.Graphics.DrawString(pd.GetValue(Nothing).ToString(), _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 200, ypos)

            ypos += 12

            ' Obtains and shows whether components should be aligned with the surface grid.
            pd = designerOptionSvc.Options.Properties("SnapToGrid")

            e.Graphics.DrawString("SnapToGrid", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, ypos)

            e.Graphics.DrawString(pd.GetValue(Nothing).ToString(), _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 200, ypos)

            ypos += 12

            ' Obtains and shows which layout mode is selected.
            pd = designerOptionSvc.Options.Properties("LayoutMode")

            e.Graphics.DrawString("LayoutMode", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, ypos)

            e.Graphics.DrawString(pd.GetValue(Nothing).ToString(), _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 200, ypos)

            ypos += 12

            ' Obtains and shows whether the Toolbox is automatoically
            ' populated with custom controls and components.
            pd = designerOptionSvc.Options.Properties("AutoToolboxPopulate")

            e.Graphics.DrawString("AutoToolboxPopulate", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, ypos)

            e.Graphics.DrawString(pd.GetValue(Nothing).ToString(), _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 200, ypos)

            ypos += 12

            ' Obtains and shows whether the component cache is used.
            pd = designerOptionSvc.Options.Properties("UseOptimizedCodeGeneration")

            e.Graphics.DrawString("Optimized Code Generation", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, ypos)

            e.Graphics.DrawString(pd.GetValue(Nothing).ToString(), _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 200, ypos)

            ypos += 12

            ' Obtains and shows whether designer actions are automatically opened.
            pd = designerOptionSvc.Options.Properties("ObjectBoundSmartTagAutoShow")

            e.Graphics.DrawString("Automatically Open Designer Actions", _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 4, ypos)

            e.Graphics.DrawString(pd.GetValue(Nothing).ToString(), _
            New Font("Arial", 8), _
            New SolidBrush(Color.Black), 200, ypos)
      End If
    End Sub
End Class

Commenti

La DesignerOptionService classe fornisce una raccolta di opzioni. Ognuna di queste raccolte di opzioni dispone di un indicizzatore che consente di filtrare ulteriormente. Ogni raccolta di opzioni contiene un proprio set di opzioni, nonché un rollup di tutte le opzioni figlio. In caso di conflitto di denominazione tra le proprietà, l'oggetto opzioni più esterno ha la precedenza. Gli strumenti seguenti | La struttura dell'interfaccia utente Options mostra come l'oggetto opzioni più esterno assume maggiore importanza:

WindowsFormsDesigner | Generale

• SnapToGrid

• ShowGrid

• GridSize

Dato un IDesignerOptionService oggetto denominato service, per ottenere il valore della GridSize proprietà , eseguire la chiamata seguente:

// Obtains and shows the size of the standard design-mode grid square.
System::Drawing::Size size =  *dynamic_cast<System::Drawing::Size^>(designerOptionService->GetOptionValue( "WindowsFormsDesigner\\General", "GridSize" ));

// Obtains and shows the size of the standard design-mode grid square.
Size size = (Size)designerOptionService.GetOptionValue("WindowsFormsDesigner\\General", "GridSize");

' Obtains and shows the size of the standard design-mode grid square.
Dim size As Size = CType(designerOptionService.GetOptionValue("WindowsFormsDesigner\General", "GridSize"), Size)

Questa operazione funziona fino a quando non si vuole passare GridSize a un'altra pagina. Inoltre, IDesignerOptionService non fornisce alcun meccanismo di individuazione. Se non si conosce la stringa da passare, il servizio non riesce a trovare il valore della proprietà.

La DesignerOptionService classe risolve questi problemi. È possibile eseguire query sulle raccolte ed è presente un convertitore di tipi definito nell'oggetto DesignerOptionService.DesignerOptionCollection che contrassegna la raccolta come espandibile. Con questo convertitore di tipi, è possibile passare l'intero servizio di opzione della finestra di progettazione a una finestra delle proprietà ed esaminare visivamente il servizio.

Costruttori

Proprietà

Metodi

Implementazioni dell'interfaccia esplicita

Si applica a

Vedi anche

• IDesignerOptionService
• DesignerOptionService.DesignerOptionCollection