IDesignerHost 介面

定義

命名空間:

System.ComponentModel.Design

組件:

System.ComponentModel.TypeConverter.dll

提供用來管理設計工具異動和元件的介面。

public interface class IDesignerHost : IServiceProvider, System::ComponentModel::Design::IServiceContainer

public interface IDesignerHost : IServiceProvider, System.ComponentModel.Design.IServiceContainer

type IDesignerHost = interface
    interface IServiceContainer
    interface IServiceProvider

Public Interface IDesignerHost
Implements IServiceContainer, IServiceProvider

衍生

System.ComponentModel.Design.Serialization.IDesignerLoaderHost

System.ComponentModel.Design.Serialization.IDesignerLoaderHost2

實作

IServiceContainer IServiceProvider

範例

下列範例程式代碼示範如何從設計工具或月臺元件取得 IDesignerHost 服務介面。

// Requests an IDesignerHost service from the design time environment using Component.Site.GetService()
IDesignerHost^ dh = static_cast<IDesignerHost^>(this->Component->Site->GetService( IDesignerHost::typeid ));

// Requests an IDesignerHost service from the design time environment using Component.Site.GetService()
IDesignerHost dh = (IDesignerHost) this.Component.Site.GetService(typeof(IDesignerHost));

' Requests an IDesignerHost service from the design time environment using Component.Site.GetService()
Dim host As IDesignerHost = CType(Me.Component.Site.GetService(GetType(IDesignerHost)), IDesignerHost)

下列範例程式代碼示範如何使用 IDesignerHost 介面來列出專案元件。

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

using namespace System;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Drawing;
using namespace System::Windows::Forms;
using namespace System::Security::Permissions;

// Provides a form containing a listbox that can display 
// a list of project components.
public ref class DesignerHostListForm: public System::Windows::Forms::Form
{
public:
   System::Windows::Forms::ListBox^ listBox1;

private:
   System::Windows::Forms::Button^ ok_button;

public:
   DesignerHostListForm()
   {
      this->Name = "DesignerHostListForm";
      this->Text = "List of design-time project components";
      this->SuspendLayout();
      this->listBox1 = gcnew System::Windows::Forms::ListBox;
      this->listBox1->Location = System::Drawing::Point( 8, 8 );
      this->listBox1->Name = "listBox1";
      this->listBox1->Size = System::Drawing::Size( 385, 238 );
      this->listBox1->TabIndex = 0;
      this->listBox1->Anchor = static_cast<AnchorStyles>(((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom) | System::Windows::Forms::AnchorStyles::Left) | System::Windows::Forms::AnchorStyles::Right);
      this->ok_button = gcnew System::Windows::Forms::Button;
      this->ok_button->DialogResult = System::Windows::Forms::DialogResult::OK;
      this->ok_button->Location = System::Drawing::Point( 232, 256 );
      this->ok_button->Name = "ok_button";
      this->ok_button->TabIndex = 1;
      this->ok_button->Text = "OK";
      this->ok_button->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right);
      this->ClientSize = System::Drawing::Size( 400, 285 );
      array<System::Windows::Forms::Control^>^temp2 = {this->ok_button,this->listBox1};
      this->Controls->AddRange( temp2 );
      this->ResumeLayout( false );
   }

public:
   ~DesignerHostListForm()
   {
   }
};


// You can double-click the component of an IDesignerHostExampleDesigner 
// to show a form containing a listbox that lists the name and type 
// of each component or control in the current design-time project.
public ref class IDesignerHostExampleDesigner: public IDesigner
{
private:
   System::ComponentModel::IComponent^ component;

public:
   IDesignerHostExampleDesigner(){}

   virtual void DoDefaultAction()
   {
      ListComponents();
   }

   virtual void Initialize( System::ComponentModel::IComponent^ component )
   {
      this->component = component;
      MessageBox::Show( "Double-click the IDesignerHostExample component to view a list of project components." );
   }


private:

   // Displays a list of components in the current design 
   // document when the default action of the designer is invoked.
   void ListComponents()
   {
      DesignerHostListForm^ listform = gcnew DesignerHostListForm;

      // Obtain an IDesignerHost service from the design environment.
      IDesignerHost^ host = dynamic_cast<IDesignerHost^>(this->component->Site->GetService( IDesignerHost::typeid ));

      // Get the project components container (control containment depends on Controls collections)
      IContainer^ container = host->Container;

      // Add each component's type name and name to the list box.
      System::Collections::IEnumerator^ myEnum = container->Components->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         IComponent^ component = safe_cast<IComponent^>(myEnum->Current);
         listform->listBox1->Items->Add( String::Concat( component->GetType()->Name, " : ", component->Site->Name ) );
      }

      listform->ShowDialog();
   }

public:

   property System::ComponentModel::IComponent^ Component 
   {
      virtual System::ComponentModel::IComponent^ get()
      {
         return this->component;
      }
   }

   property System::ComponentModel::Design::DesignerVerbCollection^ Verbs 
   {
      [PermissionSetAttribute(SecurityAction::Demand, Name="FullTrust")]
      virtual System::ComponentModel::Design::DesignerVerbCollection^ get()
      {
         DesignerVerbCollection^ dvc = gcnew DesignerVerbCollection;
         dvc->Add( gcnew DesignerVerb( "List Components",gcnew EventHandler( this, &IDesignerHostExampleDesigner::ListHandler ) ) );
         return dvc;
      }
   }

private:
   void ListHandler( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      ListComponents();
   }

public:
   ~IDesignerHostExampleDesigner(){}
};


// IDesignerHostExampleComponent is a component associated 
// with the IDesignerHostExampleDesigner that demonstrates 
// acquisition and use of the IDesignerHost service 
// to list project components.

[DesignerAttribute(IDesignerHostExampleDesigner::typeid)]
public ref class IDesignerHostExampleComponent: public System::ComponentModel::Component
{
public:
   IDesignerHostExampleComponent(){}

public:
   ~IDesignerHostExampleComponent(){}
};

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

namespace IDesignerHostExample
{	
    // IDesignerHostExampleComponent is a component associated 
    // with the IDesignerHostExampleDesigner that demonstrates 
    // acquisition and use of the IDesignerHost service 
    // to list project components.
    [DesignerAttribute(typeof(IDesignerHostExampleDesigner))]
    public class IDesignerHostExampleComponent : System.ComponentModel.Component
    {
        public IDesignerHostExampleComponent()
        {}

        protected override void Dispose( bool disposing )
        {
            base.Dispose( disposing );
        }
    }

    // You can double-click the component of an IDesignerHostExampleDesigner 
    // to show a form containing a listbox that lists the name and type 
    // of each component or control in the current design-time project.
    public class IDesignerHostExampleDesigner : IDesigner
    {
        private System.ComponentModel.IComponent component;

        public IDesignerHostExampleDesigner()
        {}

        public void DoDefaultAction()
        {
            ListComponents();
        }

        public void Initialize(System.ComponentModel.IComponent component)
        {
            this.component = component;
            MessageBox.Show("Double-click the IDesignerHostExample component to view a list of project components.");
        }

        // Displays a list of components in the current design 
        // document when the default action of the designer is invoked.
        private void ListComponents()
        {
            using (DesignerHostListForm listform = new DesignerHostListForm())
            {
                // Obtain an IDesignerHost service from the design environment.
                IDesignerHost host = (IDesignerHost)this.component.Site.GetService(typeof(IDesignerHost));
                // Get the project components container (control containment depends on Controls collections)
                IContainer container = host.Container;
                // Add each component's type name and name to the list box.
                foreach (IComponent component in container.Components)
                {
                    listform.listBox1.Items.Add(component.GetType().Name + " : " + component.Site.Name);
                }
                // Display the form.
                listform.ShowDialog();
            }
        }

        public System.ComponentModel.IComponent Component
        {
            get
            {
                return this.component;
            }
        }

        public System.ComponentModel.Design.DesignerVerbCollection Verbs
        {
            get
            {
                DesignerVerbCollection dvc = new DesignerVerbCollection();
                dvc.Add( new DesignerVerb("List Components", new EventHandler(ListHandler)) );
                return dvc;
            }
        }

        private void ListHandler(object sender, EventArgs e)
        {
            ListComponents();
        }

        public void Dispose() {	}
    }

    // Provides a form containing a listbox that can display 
    // a list of project components.
    public class DesignerHostListForm : System.Windows.Forms.Form
    {
        public System.Windows.Forms.ListBox listBox1;
        private System.Windows.Forms.Button ok_button;
        
        public DesignerHostListForm()
        {
            this.Name = "DesignerHostListForm";
            this.Text = "List of design-time project components";
            this.SuspendLayout();
            this.listBox1 = new System.Windows.Forms.ListBox();						
            this.listBox1.Location = new System.Drawing.Point(8, 8);
            this.listBox1.Name = "listBox1";
            this.listBox1.Size = new System.Drawing.Size(385, 238);
            this.listBox1.TabIndex = 0;	
            this.listBox1.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right);		
            this.ok_button = new System.Windows.Forms.Button();
            this.ok_button.DialogResult = System.Windows.Forms.DialogResult.OK;
            this.ok_button.Location = new System.Drawing.Point(232, 256);
            this.ok_button.Name = "ok_button";
            this.ok_button.TabIndex = 1;
            this.ok_button.Text = "OK";
            this.ok_button.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
            this.ClientSize = new System.Drawing.Size(400, 285);
            this.Controls.AddRange(new System.Windows.Forms.Control[] { this.ok_button, this.listBox1 });
            this.ResumeLayout(false);	
        }

        protected override void Dispose( bool disposing )
        {			
            base.Dispose( disposing );
        }	
    }
}

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

Namespace IDesignerHostExample
   
   ' IDesignerHostExampleComponent is a component associated 
   ' with the IDesignerHostExampleDesigner that demonstrates 
   ' acquisition and use of the IDesignerHost service 
   ' to list project components.
    <DesignerAttribute(GetType(IDesignerHostExampleDesigner))> _
    Public Class IDesignerHostExampleComponent
        Inherits System.ComponentModel.Component

        Public Sub New()
        End Sub

        Protected Overloads Sub Dispose(ByVal disposing As Boolean)
            MyBase.Dispose(disposing)
        End Sub 
    End Class 

    ' You can double-click the component of a IDesignerHostExampleDesigner
    ' to show a form containing a listbox that lists the name and type 
    ' of each component or control in the current design-time project.
    <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
    Public Class IDesignerHostExampleDesigner
        Implements IDesigner
        Private component_ As System.ComponentModel.IComponent

        Public Sub New()
        End Sub

        Public Sub DoDefaultAction() Implements IDesigner.DoDefaultAction
            ListComponents()
        End Sub

        Public Sub Initialize(ByVal component As System.ComponentModel.IComponent) Implements IDesigner.Initialize
            Me.component_ = component
            MessageBox.Show("Double-click the IDesignerHostExample component to view a list of project components.")
        End Sub

        ' Displays a list of components in the current design 
        ' document when the default action of the designer is invoked.
        Private Sub ListComponents()

            Using listform As New DesignerHostListForm()

                ' Obtain an IDesignerHost service from the design environment.
                Dim host As IDesignerHost = CType(Me.Component.Site.GetService(GetType(IDesignerHost)), IDesignerHost)
                ' Get the project components container (control containment depends on Controls collections)
                Dim container As IContainer = host.Container
                ' Add each component's type name and name to the list box.
                Dim comp As Component
                For Each comp In container.Components
                    listform.listBox1.Items.Add((comp.GetType().Name + " : " + Component.Site.Name))
                Next comp
                ' Display the form.
                listform.ShowDialog()

            End Using

        End Sub

        Public ReadOnly Property Component() As System.ComponentModel.IComponent Implements IDesigner.Component
            Get
                Return component_
            End Get
        End Property

        Public ReadOnly Property Verbs() As System.ComponentModel.Design.DesignerVerbCollection Implements IDesigner.Verbs
            Get
                Dim dvc As New DesignerVerbCollection()
                dvc.Add(New DesignerVerb("List Components", New EventHandler(AddressOf ListHandler)))
                Return dvc
            End Get
        End Property

        Private Sub ListHandler(ByVal sender As Object, ByVal e As EventArgs)
            ListComponents()
        End Sub

        Public Sub Dispose() Implements IDisposable.Dispose
        End Sub
    End Class
    _ 

    ' Provides a form containing a list box that can display 
    ' a list of project components.
    Public Class DesignerHostListForm
        Inherits System.Windows.Forms.Form
        Public listBox1 As System.Windows.Forms.ListBox
        Private ok_button As System.Windows.Forms.Button

        Public Sub New()
            Me.Name = "DesignerHostListForm"
            Me.Text = "List of design-time project components"
            Me.SuspendLayout()
            Me.listBox1 = New System.Windows.Forms.ListBox()
            Me.listBox1.Location = New System.Drawing.Point(8, 8)
            Me.listBox1.Name = "listBox1"
            Me.listBox1.Size = New System.Drawing.Size(385, 238)
            Me.listBox1.TabIndex = 0
            Me.listBox1.Anchor = (((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
            Or System.Windows.Forms.AnchorStyles.Left) Or System.Windows.Forms.AnchorStyles.Right)
            Me.ok_button = New System.Windows.Forms.Button()
            Me.ok_button.DialogResult = System.Windows.Forms.DialogResult.OK
            Me.ok_button.Location = New System.Drawing.Point(232, 256)
            Me.ok_button.Name = "ok_button"
            Me.ok_button.TabIndex = 1
            Me.ok_button.Text = "OK"
            Me.ok_button.Anchor = (System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right)
            Me.ClientSize = New System.Drawing.Size(400, 285)
            Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.ok_button, Me.listBox1})
            Me.ResumeLayout(False)
        End Sub 

        Protected Overloads Sub Dispose(ByVal disposing As Boolean)
            MyBase.Dispose(disposing)
        End Sub 
    End Class 
End Namespace

備註

IDesignerHost是一種介面，可與 .NET Framework 窗體設計工具架構搭配使用，以提供設計工具交易和元件管理的支援。

.NET Framework 不提供這個介面的實作。 介面是由支持設計工具的開發工具所實作。

給呼叫者的注意事項

若要從開發環境取得的 IDesignerHost 實作，請在元件處於設計模式時呼叫 GetService(Type) ，傳遞的型 IDesignerHost 別以要求 IDesignerHost 服務介面。

IDesignerHost 提供與設計工具狀態相關的下列成員：

• 屬性 Loading 會指出正在載入設計工具或檔。

• 當 Activated 設計工具在顯示之前啟動時，就會發生此事件。

• 停用設計工具時，就會發生此 Deactivated 事件。

• 載入 LoadComplete 文件之後就會發生此事件。

• 方法 Activate() 會啟動設計工具。

IDesignerHost 提供下列與管理元件相關的成員：

• 屬性 Container 會指出設計工具主機的容器。

• 屬性 RootComponent 會指出根元件的基類。

• 屬性 RootComponentClassName 會指出根元件類別的名稱。

• 方法 CreateComponent(Type) 會建立指定的元件類型。

• 方法 DestroyComponent(IComponent) 會終結指定的元件。

• 方法 GetDesigner(IComponent) 會取得與指定元件相關聯的設計工具。

• 方法 GetType(String) 會取得具有指定名稱之型別的實例。

IDesignerHost 提供下列與管理交易相關的成員：

• 屬性 InTransaction 會指出設計工具是否在交易中。

• 屬性 TransactionDescription 表示目前的交易描述。

• 當 TransactionClosed 交易完成時，就會發生此事件。

• 當交易即將完成時，就會發生此 TransactionClosing 事件。

• 當交易開始時，就會發生此 TransactionOpened 事件。

• 當交易即將開始時，就會發生此 TransactionOpening 事件。

• 方法 CreateTransaction() 會建立並傳回新的交易。

屬性

Container	取得這個設計工具主應用程式的容器。
InTransaction	取得數值，指示設計工具主應用程式目前是否在異動中。
Loading	取得數值，指示設計工具主應用程式目前是否正在載入文件。
RootComponent	取得用來做為目前設計根元件之基底類別的執行個體。
RootComponentClassName	取得正在設計的類別的完整名稱。
TransactionDescription	取得目前異動的描述。

方法

Activate()	啟動這個主應用程式正在裝載的設計工具。
AddService(Type, Object)	將指定的服務加入至服務容器。 (繼承來源 IServiceContainer)
AddService(Type, Object, Boolean)	將指定的服務加入至服務容器，並選擇性地將服務升級至任何父項服務容器。 (繼承來源 IServiceContainer)
AddService(Type, ServiceCreatorCallback)	將指定的服務加入至服務容器。 (繼承來源 IServiceContainer)
AddService(Type, ServiceCreatorCallback, Boolean)	將指定的服務加入至服務容器，並選擇性地將服務升級至父項服務容器。 (繼承來源 IServiceContainer)
CreateComponent(Type)	建立指定型別的元件，並將其加入至設計文件中。
CreateComponent(Type, String)	建立指定型別和名稱的元件，並將其加入至設計文件中。
CreateTransaction()	建立 DesignerTransaction，它可以封裝事件序列，以改善效能，並啟用復原和取消復原支援功能。
CreateTransaction(String)	使用指定的異動描述，建立 DesignerTransaction，它可以用來封裝事件序列，以改善效能，並啟用復原和取消復原支援功能。
DestroyComponent(IComponent)	終結指定的元件，並將其從設計工具容器移除。
GetDesigner(IComponent)	取得含有指定元件的設計工具執行個體。
GetService(Type)	取得指定類型的服務物件。 (繼承來源 IServiceProvider)
GetType(String)	取得指定的、完整的型別名稱的執行個體。
RemoveService(Type)	從服務容器中移除指定的服務類型。 (繼承來源 IServiceContainer)
RemoveService(Type, Boolean)	從服務容器中移除指定的服務類型，並選擇性地將服務升級至父項服務容器。 (繼承來源 IServiceContainer)

事件

Activated	發生於這個設計工具啟動時。
Deactivated	發生於這個設計工具停用時。
LoadComplete	發生於這個設計工具完成載入其文件時。
TransactionClosed	加入 TransactionClosed 事件的事件處理常式。
TransactionClosing	加入 TransactionClosing 事件的事件處理常式。
TransactionOpened	加入 TransactionOpened 事件的事件處理常式。
TransactionOpening	加入 TransactionOpening 事件的事件處理常式。

另請參閱

• IDesigner
• IDesignerEventService
• IDesignerOptionService