IReferenceService Interface

Definitie

public interface class IReferenceService

public interface IReferenceService

type IReferenceService = interface

Public Interface IReferenceService

Voorbeelden

In het volgende voorbeeld besturingselement wordt de GetReferences methode van de IReferenceService interface gebruikt om een lijst met onderdelen op te halen in het huidige ontwerpmodusproject van het type van het geselecteerde onderdeel.

#using <System.Windows.Forms.dll>
#using <System.Data.dll>
#using <System.Drawing.dll>
#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Drawing;
using namespace System::Data;
using namespace System::Windows::Forms;

// This control displays the name and type of the primary selection 
// component in design mode, if there is one,
// and uses the IReferenceService interface to display the names of 
// any components of the type of the primary selected component.    
// This control uses the IComponentChangeService to monitor for 
// selection changed events.
public ref class IReferenceServiceControl: public System::Windows::Forms::UserControl
{
private:

   // Indicates the name of the type of the selected component, or "None selected.".
   String^ selected_typename;

   // Indicates the name of the base type of the selected component, or "None selected."
   String^ selected_basetypename;

   // Indicates the name of the selected component.
   String^ selected_componentname;

   // Contains the names of components of the type of the selected 
   // component in design mode.
   array<String^>^typeComponents;

   // Contains the names of components of the base type of the selected component in design mode.
   array<String^>^basetypeComponents;

   // Reference to the IComponentChangeService for the current component.
   ISelectionService^ selectionService;

public:
   IReferenceServiceControl()
   {
      // Initializes the control properties.
      this->BackColor = Color::White;
      this->SetStyle( ControlStyles::ResizeRedraw, true );
      this->Name = "IReferenceServiceControl";
      this->Size = System::Drawing::Size( 500, 250 );

      // Initializes the data properties.
      typeComponents = gcnew array<String^>(0);
      basetypeComponents = gcnew array<String^>(0);
      selected_typename = "None selected.";
      selected_basetypename = "None selected.";
      selected_componentname = "None selected.";
      selectionService = nullptr;
   }


   property System::ComponentModel::ISite^ Site 
   {
      // Registers and unregisters design-mode services when 
      // the component is sited and unsited.
      virtual System::ComponentModel::ISite^ get() override
      {
         // Returns the site for the control.
         return __super::Site;
      }

      virtual void set( System::ComponentModel::ISite^ value ) override
      {
         // The site is set to null when a component is cut or 
         // removed from a design-mode site.
         // If an event handler has already been linked with 
         // an ISelectionService, remove the handler.
         if ( selectionService != nullptr )
                  selectionService->SelectionChanged -= gcnew EventHandler( this, &IReferenceServiceControl::OnSelectionChanged );

         // Sites the control.
         __super::Site = value;

         // Obtains an ISelectionService interface to register 
         // the selection changed event handler with.
         selectionService = dynamic_cast<ISelectionService^>(this->GetService( ISelectionService::typeid ));
         if ( selectionService != nullptr )
         {
            selectionService->SelectionChanged += gcnew EventHandler( this, &IReferenceServiceControl::OnSelectionChanged );

            // Updates the display for the current selection, if any.
            DisplayComponentsOfSelectedComponentType();
         }
      }
   }

private:

   // Updates the display according to the primary selected component, 
   // if any, and the names of design-mode components that the 
   // IReferenceService returns references for when queried for 
   // references to components of the primary selected component's 
   // type and base type.
   void DisplayComponentsOfSelectedComponentType()
   {
      // If a component is selected...
      if ( selectionService->PrimarySelection != nullptr )
      {
         // Sets the selected type name and selected component name to the type and name of the primary selected component.
         selected_typename = selectionService->PrimarySelection->GetType()->FullName;
         selected_basetypename = selectionService->PrimarySelection->GetType()->BaseType->FullName;
         selected_componentname = (dynamic_cast<IComponent^>(selectionService->PrimarySelection))->Site->Name;

         // Obtain an IReferenceService and obtain references to 
         // each component in the design-mode project
         // of the selected component's type and base type.
         IReferenceService^ rs = dynamic_cast<IReferenceService^>(this->GetService( IReferenceService::typeid ));
         if ( rs != nullptr )
         {
            // Get references to design-mode components of the 
            // primary selected component's type.
            array<Object^>^comps = (array<Object^>^)rs->GetReferences( selectionService->PrimarySelection->GetType() );
            typeComponents = gcnew array<String^>(comps->Length);
            for ( int i = 0; i < comps->Length; i++ )
               typeComponents[ i ] = (dynamic_cast<IComponent^>(comps[ i ]))->Site->Name;

            // Get references to design-mode components with a base type 
            // of the primary selected component's base type.
            comps = (array<Object^>^)rs->GetReferences( selectionService->PrimarySelection->GetType()->BaseType );
            basetypeComponents = gcnew array<String^>(comps->Length);
            for ( int i = 0; i < comps->Length; i++ )
               basetypeComponents[ i ] = (dynamic_cast<IComponent^>(comps[ i ]))->Site->Name;
         }
      }
      else
      {
         selected_typename = "None selected.";
         selected_basetypename = "None selected.";
         selected_componentname = "None selected.";
         typeComponents = gcnew array<String^>(0);
         basetypeComponents = gcnew array<String^>(0);
      }

      this->Refresh();
   }

   void OnSelectionChanged( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      DisplayComponentsOfSelectedComponentType();
   }


protected:
   virtual void OnPaint( System::Windows::Forms::PaintEventArgs^ e ) override
   {
      e->Graphics->DrawString( "IReferenceService Example Control", gcnew System::Drawing::Font( FontFamily::GenericMonospace,9 ), gcnew SolidBrush( Color::Blue ), 5, 5 );
      e->Graphics->DrawString( "Primary Selected Component from IComponentChangeService:", gcnew System::Drawing::Font( FontFamily::GenericMonospace,8 ), gcnew SolidBrush( Color::Red ), 5, 20 );
      e->Graphics->DrawString( String::Format( "Name:      {0}", selected_componentname ), gcnew System::Drawing::Font( FontFamily::GenericMonospace,8 ), gcnew SolidBrush( Color::Black ), 10, 32 );
      e->Graphics->DrawString( String::Format( "Type:      {0}", selected_typename ), gcnew System::Drawing::Font( FontFamily::GenericMonospace,8 ), gcnew SolidBrush( Color::Black ), 10, 44 );
      e->Graphics->DrawString( String::Format( "Base Type: {0}", selected_basetypename ), gcnew System::Drawing::Font( FontFamily::GenericMonospace,8 ), gcnew SolidBrush( Color::Black ), 10, 56 );
      e->Graphics->DrawLine( gcnew Pen( gcnew SolidBrush( Color::Black ),1 ), 5, 77, this->Width - 5, 77 );
      e->Graphics->DrawString( "Components of Type from IReferenceService:", gcnew System::Drawing::Font( FontFamily::GenericMonospace,8 ), gcnew SolidBrush( Color::Red ), 5, 85 );
      if (  !selected_typename->Equals( "None selected." ) )
            for ( int i = 0; i < typeComponents->Length; i++ )
         e->Graphics->DrawString( typeComponents[ i ], gcnew System::Drawing::Font( FontFamily::GenericMonospace,8 ), gcnew SolidBrush( Color::Black ), 20.f, 97.f + (i * 12) );

      e->Graphics->DrawString( "Components of Base Type from IReferenceService:", gcnew System::Drawing::Font( FontFamily::GenericMonospace,8 ), gcnew SolidBrush( Color::Red ), 5.f, 109.f + (typeComponents->Length * 12) );
      if (  !selected_typename->Equals( "None selected." ) )
            for ( int i = 0; i < basetypeComponents->Length; i++ )
         e->Graphics->DrawString( basetypeComponents[ i ], gcnew System::Drawing::Font( FontFamily::GenericMonospace,8 ), gcnew SolidBrush( Color::Black ), 20.f, 121.f + (typeComponents->Length * 12) + (i * 12) );
   }
};

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

namespace IReferenceServiceExample
{
    // This control displays the name and type of the primary selection 
    // component in design mode, if there is one,
    // and uses the IReferenceService interface to display the names of 
    // any components of the type of the primary selected component.    
    // This control uses the IComponentChangeService to monitor for 
    // selection changed events.
    public class IReferenceServiceControl : System.Windows.Forms.UserControl
    {
            // Indicates the name of the type of the selected component, or "None selected.".
            private string selected_typename;
            // Indicates the name of the base type of the selected component, or "None selected."
            private string selected_basetypename;
            // Indicates the name of the selected component.
            private string selected_componentname;
            // Contains the names of components of the type of the selected 
            // component in design mode.
            private string[] typeComponents;
            // Contains the names of components of the base type of the selected component in design mode.
            private string[] basetypeComponents;
            // Reference to the IComponentChangeService for the current component.
            private ISelectionService selectionService;
        
            public IReferenceServiceControl()
            {
                // Initializes the control properties.
                this.BackColor = Color.White;
                this.SetStyle(ControlStyles.ResizeRedraw, true);
                this.Name = "IReferenceServiceControl";
                this.Size = new System.Drawing.Size(500, 250);			                        
                // Initializes the data properties.
                typeComponents = new string[0];
                basetypeComponents = new string[0];
                selected_typename = "None selected.";
                selected_basetypename = "None selected.";
                selected_componentname = "None selected.";
                selectionService = null;
            }

            // Registers and unregisters design-mode services when 
            // the component is sited and unsited.
            public override System.ComponentModel.ISite Site
            {
                get
                {
                    // Returns the site for the control.
                    return base.Site;
                }
                set
                {
                    // The site is set to null when a component is cut or 
                    // removed from a design-mode site.

                    // If an event handler has already been linked with 
                    // an ISelectionService, remove the handler.
                    if(selectionService != null)
                        selectionService.SelectionChanged -= new EventHandler(this.OnSelectionChanged);

                    // Sites the control.
                    base.Site = value;
                
                    // Obtains an ISelectionService interface to register 
                    // the selection changed event handler with.
                    selectionService = (ISelectionService)this.GetService(typeof(ISelectionService));
                    if( selectionService!= null )
                    {
                        selectionService.SelectionChanged += new EventHandler(this.OnSelectionChanged);
                        // Updates the display for the current selection, if any.
                        DisplayComponentsOfSelectedComponentType();
                    }
                }
            }

            // Updates the display according to the primary selected component, 
            // if any, and the names of design-mode components that the 
            // IReferenceService returns references for when queried for 
            // references to components of the primary selected component's 
            // type and base type.
            private void DisplayComponentsOfSelectedComponentType()
            {
                // If a component is selected...
                if( selectionService.PrimarySelection != null )
                {              
                    // Sets the selected type name and selected component name to the type and name of the primary selected component.
                    selected_typename = selectionService.PrimarySelection.GetType().FullName;
                    selected_basetypename = selectionService.PrimarySelection.GetType().BaseType.FullName;
                    selected_componentname = ((IComponent)selectionService.PrimarySelection).Site.Name;                

                    // Obtain an IReferenceService and obtain references to 
                    // each component in the design-mode project
                    // of the selected component's type and base type.
                    IReferenceService rs = (IReferenceService)this.GetService(typeof(IReferenceService));
                    if( rs != null )
                    {
                        // Get references to design-mode components of the 
                        // primary selected component's type.
                        object[] comps = (object[])rs.GetReferences( selectionService.PrimarySelection.GetType() );
                        typeComponents = new string[comps.Length];
                        for(int i=0; i<comps.Length; i++)
                            typeComponents[i] = ((IComponent)comps[i]).Site.Name;
   
                        // Get references to design-mode components with a base type 
                        // of the primary selected component's base type.
                        comps = (object[])rs.GetReferences( selectionService.PrimarySelection.GetType().BaseType );
                        basetypeComponents = new string[comps.Length];
                        for(int i=0; i<comps.Length; i++)
                            basetypeComponents[i] = ((IComponent)comps[i]).Site.Name;
                    }
                }
                else
                {
                    selected_typename = "None selected.";
                    selected_basetypename = "None selected.";
                    selected_componentname = "None selected.";
                    typeComponents = new string[0];
                    basetypeComponents = new string[0];
                }
                this.Refresh();
            }

            private void OnSelectionChanged(object sender, EventArgs e)
            {
                DisplayComponentsOfSelectedComponentType();
            }

            protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
            {
                e.Graphics.DrawString("IReferenceService Example Control", new Font(FontFamily.GenericMonospace, 9), new SolidBrush(Color.Blue), 5, 5);

                e.Graphics.DrawString("Primary Selected Component from IComponentChangeService:", new Font(FontFamily.GenericMonospace, 8), new SolidBrush(Color.Red), 5, 20);
                e.Graphics.DrawString("Name:      "+selected_componentname, new Font(FontFamily.GenericMonospace, 8), new SolidBrush(Color.Black), 10, 32);
                e.Graphics.DrawString("Type:      "+selected_typename, new Font(FontFamily.GenericMonospace, 8), new SolidBrush(Color.Black), 10, 44);
                e.Graphics.DrawString("Base Type: "+selected_basetypename, new Font(FontFamily.GenericMonospace, 8), new SolidBrush(Color.Black), 10, 56);
                e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 5, 77, this.Width-5, 77);
            
                e.Graphics.DrawString("Components of Type from IReferenceService:", new Font(FontFamily.GenericMonospace, 8), new SolidBrush(Color.Red), 5, 85);                        
                if( selected_typename != "None selected." )
                    for(int i=0; i<typeComponents.Length; i++)
                        e.Graphics.DrawString(typeComponents[i], new Font(FontFamily.GenericMonospace, 8), new SolidBrush(Color.Black), 20, 97+(i*12));
            
                e.Graphics.DrawString("Components of Base Type from IReferenceService:", new Font(FontFamily.GenericMonospace, 8), new SolidBrush(Color.Red), 5, 109+(typeComponents.Length*12));
                if( selected_typename != "None selected." )
                    for(int i=0; i<basetypeComponents.Length; i++)
                        e.Graphics.DrawString(basetypeComponents[i], new Font(FontFamily.GenericMonospace, 8), new SolidBrush(Color.Black), 20, 121+(typeComponents.Length*12)+(i*12));
            }
    }
}

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

Namespace IReferenceServiceExample

    ' This control displays the name and type of the primary selection 
    ' component in design mode, if there is one,
    ' and uses the IReferenceService interface to display the names of 
    ' any components of the type of the primary selected component.    
    ' This control uses the IComponentChangeService to monitor for 
    ' selection changed events.    
    Public Class IReferenceServiceControl
        Inherits System.Windows.Forms.UserControl
        ' Indicates the name of the type of the selected component, or "None selected."
        Private selected_typename As String
        ' Indicates the name of the base type of the selected component, or "None selected."
        Private selected_basetypename As String
        ' Indicates the name of the selected component.
        Private selected_componentname As String
        ' Contains the names of components of the type of the selected 
        ' component in design mode.
        Private typeComponents() As String
        ' Contains the names of components of the base type of the selected component in design mode.
        Private basetypeComponents() As String
        ' Reference to the IComponentChangeService for the current component.
        Private selectionService As ISelectionService

        Public Sub New()
            ' Initializes the control properties.
            Me.BackColor = Color.White
            Me.SetStyle(ControlStyles.ResizeRedraw, True)
            Me.Name = "IReferenceServiceControl"
            Me.Size = New System.Drawing.Size(500, 250)
            ' Initializes the data properties.
            typeComponents = New String(0) {}
            basetypeComponents = New String(0) {}
            selected_typename = "None selected."
            selected_basetypename = "None selected."
            selected_componentname = "None selected."
            selectionService = Nothing
        End Sub

        ' Registers and unregisters design-mode services when 
        ' the component is sited and unsited.
        Public Overrides Property Site() As System.ComponentModel.ISite
            Get
                ' Returns the site for the control.
                Return MyBase.Site
            End Get
            Set(ByVal Value As System.ComponentModel.ISite)
                ' The site is set to null when a component is cut or 
                ' removed from a design-mode site.

                ' If an event handler has already been linked with 
                ' an ISelectionService, remove the handler.
                If (selectionService IsNot Nothing) Then
                    RemoveHandler selectionService.SelectionChanged, AddressOf Me.OnSelectionChanged
                End If

                ' Sites the control.
                MyBase.Site = Value

                ' Obtains an ISelectionService interface to register 
                ' the selection changed event handler with.
                selectionService = CType(Me.GetService(GetType(ISelectionService)), ISelectionService)
                If (selectionService IsNot Nothing) Then
                    AddHandler selectionService.SelectionChanged, AddressOf Me.OnSelectionChanged
                    ' Updates the display for the current selection, if any.
                    DisplayComponentsOfSelectedComponentType()
                End If
            End Set
        End Property

        ' Updates the display according to the primary selected component, 
        ' if any, and the names of design-mode components that the 
        ' IReferenceService returns references for when queried for 
        ' references to components of the primary selected component's 
        ' type and base type.
        Private Sub DisplayComponentsOfSelectedComponentType()
            ' If a component is selected...
            If (selectionService.PrimarySelection IsNot Nothing) Then
                ' Sets the selected type name and selected component name 
                ' to the type and name of the primary selected component.
                selected_typename = selectionService.PrimarySelection.GetType().FullName
                selected_basetypename = selectionService.PrimarySelection.GetType().BaseType.FullName
                selected_componentname = CType(selectionService.PrimarySelection, IComponent).Site.Name

                ' Obtain an IReferenceService and obtain references to 
                ' each component in the design-mode project.
                ' of the selected component's type and base type.
                Dim rs As IReferenceService = CType(Me.GetService(GetType(IReferenceService)), IReferenceService)
                If (rs IsNot Nothing) Then
                    ' Get references to design-mode components of the 
                    ' primary selected component's type.
                    Dim comps As Object() = CType(rs.GetReferences(selectionService.PrimarySelection.GetType()), Object())
                    typeComponents = New String(comps.Length) {}
                    Dim i As Integer
                    For i = 0 To comps.Length - 1
                        typeComponents(i) = CType(comps(i), IComponent).Site.Name
                    Next i
                    ' Get references to design-mode components with a base type 
                    ' of the primary selected component's base type.
                    comps = CType(rs.GetReferences(selectionService.PrimarySelection.GetType().BaseType), Object())
                    basetypeComponents = New String(comps.Length) {}               
                    For i = 0 To comps.Length - 1
                        basetypeComponents(i) = CType(comps(i), IComponent).Site.Name
                    Next i
                End If
            Else
                selected_typename = "None selected."
                selected_basetypename = "None selected."
                selected_componentname = "None selected."
                typeComponents = New String(0) {}
                basetypeComponents = New String(0) {}
            End If
            Me.Refresh()
        End Sub

        Private Sub OnSelectionChanged(ByVal sender As Object, ByVal e As EventArgs)
            DisplayComponentsOfSelectedComponentType()
        End Sub

        Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
            e.Graphics.DrawString("IReferenceService Example Control", New Font(FontFamily.GenericMonospace, 9), New SolidBrush(Color.Blue), 5, 5)

            e.Graphics.DrawString("Primary Selected Component from IComponentChangeService:", New Font(FontFamily.GenericMonospace, 8), New SolidBrush(Color.Red), 5, 20)
            e.Graphics.DrawString("Name:      " + selected_componentname, New Font(FontFamily.GenericMonospace, 8), New SolidBrush(Color.Black), 10, 32)
            e.Graphics.DrawString("Type:      " + selected_typename, New Font(FontFamily.GenericMonospace, 8), New SolidBrush(Color.Black), 10, 44)
            e.Graphics.DrawString("Base Type: " + selected_basetypename, New Font(FontFamily.GenericMonospace, 8), New SolidBrush(Color.Black), 10, 56)
            e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 5, 77, Me.Width - 10, 77)

            e.Graphics.DrawString("Components of Type from IReferenceService:", New Font(FontFamily.GenericMonospace, 8), New SolidBrush(Color.Red), 5, 85)
            If selected_typename <> "None selected." Then
                Dim i As Integer
                For i = 0 To typeComponents.Length - 1
                    e.Graphics.DrawString(typeComponents(i), New Font(FontFamily.GenericMonospace, 8), New SolidBrush(Color.Black), 20, 97 + i * 12)
                Next i
            End If
            e.Graphics.DrawString("Components of Base Type from IReferenceService:", New Font(FontFamily.GenericMonospace, 8), New SolidBrush(Color.Red), 5, 109 + typeComponents.Length * 12)
            If selected_typename <> "None selected." Then
                Dim i As Integer
                For i = 0 To basetypeComponents.Length - 1
                    e.Graphics.DrawString(basetypeComponents(i), New Font(FontFamily.GenericMonospace, 8), New SolidBrush(Color.Black), 20, 121 + typeComponents.Length * 12 + i * 12)
                Next i
            End If
        End Sub

    End Class
End Namespace 'IReferenceServiceExample

Opmerkingen

De IReferenceService interface biedt de volgende methoden:

• De GetReference methode retourneert het onderdeel met de opgegeven naam of null als er geen onderdeel met de opgegeven naam is gevonden.

• De GetName methode retourneert de naam die is gekoppeld aan het opgegeven onderdeel.

• De GetComponent methode retourneert de bovenliggende container van het opgegeven onderdeel.

• De GetReferences methode retourneert een matrix met verwijzingen naar alle projectonderdelen of alle projectonderdelen van een optioneel opgegeven type.