IReferenceService Rozhraní
Definice
Důležité
Některé informace platí pro předběžně vydaný produkt, který se může zásadně změnit, než ho výrobce nebo autor vydá. Microsoft neposkytuje žádné záruky, výslovné ani předpokládané, týkající se zde uváděných informací.
Poskytuje rozhraní pro získání odkazů na objekty v rámci projektu podle názvu nebo typu, získání názvu zadaného objektu a pro vyhledání nadřazeného objektu zadaného objektu v projektu návrháře.
public interface class IReferenceServicepublic interface IReferenceServicetype IReferenceService = interfacePublic Interface IReferenceServicePříklady
Následující příklad ovládacího prvku používá metodu GetReferencesIReferenceService rozhraní k získání seznamu součástí v aktuálním projektu režimu návrhu typu aktuálně vybrané komponenty.
#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
Poznámky
Rozhraní IReferenceService poskytuje následující metody:
Metoda GetReference vrátí komponentu se zadaným názvem nebo
nullpokud nebyla nalezena žádná komponenta se zadaným názvem.Metoda GetName vrátí název přidružený k zadané komponentě.
Metoda GetComponent vrátí nadřazený kontejner zadané komponenty.
Metoda GetReferences vrátí pole odkazů na všechny součásti projektu nebo všechny součásti projektu volitelně zadaného typu.
Metody
| GetComponent(Object) |
Získá komponentu, která obsahuje zadanou komponentu. |
| GetName(Object) |
Získá název zadané součásti. |
| GetReference(String) |
Získá odkaz na komponentu, jejíž název odpovídá zadanému názvu. |
| GetReferences() |
Získá všechny dostupné odkazy na součásti projektu. |
| GetReferences(Type) |
Získá všechny dostupné odkazy na součásti zadaného typu. |
Platí pro
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