IDesignerHost 介面

定義

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

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

[System.Runtime.InteropServices.ComVisible(true)]
public interface IDesignerHost : IServiceProvider, System.ComponentModel.Design.IServiceContainer

public interface IDesignerHost : System.ComponentModel.Design.IServiceContainer

[<System.Runtime.InteropServices.ComVisible(true)>]
type IDesignerHost = interface
    interface IServiceContainer
    interface IServiceProvider

type IDesignerHost = interface
    interface IServiceContainer
    interface IServiceProvider

Public Interface IDesignerHost
Implements IServiceContainer, IServiceProvider

Public Interface IDesignerHost
Implements IServiceContainer

衍生

System.ComponentModel.Design.Serialization.IDesignerLoaderHost

System.ComponentModel.Design.Serialization.IDesignerLoaderHost2

屬性

ComVisibleAttribute

實作

IServiceContainer IServiceProvider

範例

以下範例程式碼示範如何從設計器或站點元件取得 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)

以下範例程式碼示範使用 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 是一個介面，能與 .NET Framework 表單設計架構搭配，提供設計器交易與元件管理的支援。

.NET Framework 並未提供此介面的實作。 介面由支援設計師的開發工具實作。

給呼叫者的注意事項

要從開發環境中取得實 IDesignerHost 作，請在元件處於設計模式啟動時呼叫 GetService(Type) ，傳遞 的 IDesignerHost 類型以請求服務 IDesignerHost 介面。

IDesignerHost 提供以下與設計狀態相關的成員：

• 屬性表示 Loading 是否正在載入設計器或文件。

• Activated當設計師在顯示前被啟動時，該事件就會發生。

• 當設計師被停用時，該 Deactivated 事件就會發生。

• 事件 LoadComplete 發生在文件載入後。

• 這個 Activate() 方法能激發設計師的行動。

IDesignerHost 提供以下成員以管理元件：

• 屬性 Container 表示設計主機的容器。

• 屬性表示 RootComponent 根組件的基底類別。

• 該 RootComponentClassName 屬性表示根組件的類別名稱。

• 該方法會 CreateComponent(Type) 產生指定的元件類型。

• 此 DestroyComponent(IComponent) 方法會銷毀指定的元件。

• 該 GetDesigner(IComponent) 方法會將設計師與指定的元件關聯起來。

• 該 GetType(String) 方法會取得一個具有指定名稱的型別實例。

IDesignerHost 提供以下成員以管理交易：

• 屬性 InTransaction 表示設計者是否處於交易中。

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

• TransactionClosed該事件發生在交易完成時。

• TransactionClosing該事件發生在交易即將完成時。

• TransactionOpened事件發生在交易開始時。

• TransactionOpening該事件發生在交易即將開始時。

• 該方法會 CreateTransaction() 建立並回傳新的交易。

另請參閱

• IDesigner
• IDesignerEventService
• IDesignerOptionService