WindowsFormsComponentEditor Klasse

Definition

public ref class WindowsFormsComponentEditor abstract : System::ComponentModel::ComponentEditor

public abstract class WindowsFormsComponentEditor : System.ComponentModel.ComponentEditor

type WindowsFormsComponentEditor = class
    inherit ComponentEditor

Public MustInherit Class WindowsFormsComponentEditor
Inherits ComponentEditor

Vererbung

Object

ComponentEditor

WindowsFormsComponentEditor

Abgeleitet

System.Web.UI.Design.WebControls.BaseDataListComponentEditor

System.Windows.Forms.AxHost.AxComponentEditor

Beispiele

Im folgenden Codebeispiel wird eine Beispielimplementierung WindowsFormsComponentEditor veranschaulicht.

#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::Collections;
using namespace System::Drawing;
using namespace System::IO;
using namespace System::Runtime::Serialization;
using namespace System::Runtime::Serialization::Formatters::Binary;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::Design;

// This example demonstrates how to implement a component editor that hosts 
// component pages and associate it with a component. This example also 
// demonstrates how to implement a component page that provides a panel-based 
// control system and Help keyword support.

   ref class ExampleComponentEditorPage;

   // The ExampleComponentEditor displays two ExampleComponentEditorPage pages.
   public ref class ExampleComponentEditor: public System::Windows::Forms::Design::WindowsFormsComponentEditor
   {

   protected:
      // This method override returns an type array containing the type of 
      // each component editor page to display.
      virtual array<Type^>^ GetComponentEditorPages() override
      {
         array<Type^>^temp0 = {ExampleComponentEditorPage::typeid,ExampleComponentEditorPage::typeid};
         return temp0;
      }

      // This method override returns the index of the page to display when the 
      // component editor is first displayed.
   protected:
      virtual int GetInitialComponentEditorPageIndex() override
      {
         return 1;
      }
   };

   // This example component editor page type provides an example 
   // ComponentEditorPage implementation.
   private ref class ExampleComponentEditorPage: public System::Windows::Forms::Design::ComponentEditorPage
   {
   private:
      Label^ l1;
      Button^ b1;
      PropertyGrid^ pg1;

      // Base64-encoded serialized image data for the required component editor page icon.
      String^ icon;

   public:
      ExampleComponentEditorPage()
      {
         String^ temp = "AAEAAAD/////AQAAAAAAAAAMAgAAAFRTeXN0ZW0uRHJhd2luZywgVmVyc2lvbj0xLjAuNTAwMC4wLCBDdWx0dXJlPW5ldXRyYWwsIFB1YmxpY0tleVRva2VuPWIwM2Y1ZjdmMTFkNTBhM2EFAQAAABNTeXN0ZW0uRHJhd2luZy5JY29uAgAAAAhJY29uRGF0Y"
         "QhJY29uU2l6ZQcEAhNTeXN0ZW0uRHJhd2luZy5TaXplAgAAAAIAAAAJAwAAAAX8////E1N5c3RlbS5EcmF3aW5nLlNpemUCAAAABXdpZHRoBmhlaWdodAAACAgCAAAAAAAAAAAAAAAPAwAAAD4BAAACAAABAAEAEBAQAAAAAAAoAQAAFgAAACgAAAAQAAAAIA"
         "AAAAEABAAAAAAAgAAAAAAAAAAAAAAAEAAAABAAAAAAAAAAAACAAACAAAAAgIAAgAAAAIAAgADExAAAgICAAMDAwAA+iPcAY77gACh9kwD/AAAAndPoADpw6wD///8AAAAAAAAAAAAHd3d3d3d3d8IiIiIiIiLHKIiIiIiIiCco///////4Jyj5mfIvIvgnKPn"
         "p////+Cco+en7u7v4Jyj56f////gnKPmZ8i8i+Cco///////4JyiIiIiIiIgnJmZmZmZmZifCIiIiIiIiwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACw==";
         icon = temp;
         
         // Initialize the page, which inherits from Panel, and its controls.
         this->Size = System::Drawing::Size( 400, 250 );
         this->Icon = DeserializeIconFromBase64Text( icon );
         this->Text = "Example Page";
         b1 = gcnew Button;
         b1->Size = System::Drawing::Size( 200, 20 );
         b1->Location = Point(200,0);
         b1->Text = "Set a random background color";
         b1->Click += gcnew EventHandler( this, &ExampleComponentEditorPage::randomBackColor );
         this->Controls->Add( b1 );
         l1 = gcnew Label;
         l1->Size = System::Drawing::Size( 190, 20 );
         l1->Location = Point(4,2);
         l1->Text = "Example Component Editor Page";
         this->Controls->Add( l1 );
         pg1 = gcnew PropertyGrid;
         pg1->Size = System::Drawing::Size( 400, 280 );
         pg1->Location = Point(0,30);
         this->Controls->Add( pg1 );
      }

      // This method indicates that the Help button should be enabled for this 
      // component editor page.
      virtual bool SupportsHelp() override
      {
         return true;
      }

      // This method is called when the Help button for this component editor page is pressed.
      // This implementation uses the IHelpService to show the Help topic for a sample keyword.
   public:
      virtual void ShowHelp() override
      {
         // The GetSelectedComponent method of a ComponentEditorPage retrieves the
         // IComponent associated with the WindowsFormsComponentEditor.
         IComponent^ selectedComponent = this->GetSelectedComponent();

         // Retrieve the Site of the component, and return if null.
         ISite^ componentSite = selectedComponent->Site;
         if ( componentSite == nullptr )
                  return;

         // Acquire the IHelpService to display a help topic using a indexed keyword lookup.
         IHelpService^ helpService = dynamic_cast<IHelpService^>(componentSite->GetService( IHelpService::typeid ));
         if ( helpService != nullptr )
                  helpService->ShowHelpFromKeyword( "System.Windows.Forms.ComboBox" );
      }

   protected:

      // The LoadComponent method is raised when the ComponentEditorPage is displayed.
      virtual void LoadComponent() override
      {
         this->pg1->SelectedObject = this->Component;
      }

      // The SaveComponent method is raised when the WindowsFormsComponentEditor is closing 
      // or the current ComponentEditorPage is closing.
      virtual void SaveComponent() override {}

   private:

      // If the associated component is a Control, this method sets the BackColor to a random color.
      // This method is invoked by the button on this ComponentEditorPage.
      void randomBackColor( Object^ /*sender*/, EventArgs^ /*e*/ )
      {
         if ( System::Windows::Forms::Control::typeid->IsAssignableFrom( this->::Component::GetType() ) )
         {
            // Sets the background color of the Control associated with the
            // WindowsFormsComponentEditor to a random color.
            Random^ rnd = gcnew Random;
            (dynamic_cast<System::Windows::Forms::Control^>(this->Component))->BackColor = Color::FromArgb( rnd->Next( 255 ), rnd->Next( 255 ), rnd->Next( 255 ) );
            pg1->Refresh();
         }
      }

      // This method can be used to retrieve an Icon from a block 
      // of Base64-encoded text.
      System::Drawing::Icon^ DeserializeIconFromBase64Text( String^ text )
      {
         System::Drawing::Icon^ img = nullptr;
         array<Byte>^memBytes = Convert::FromBase64String( text );
         IFormatter^ formatter = gcnew BinaryFormatter;
         MemoryStream^ stream = gcnew MemoryStream( memBytes );
         img = dynamic_cast<System::Drawing::Icon^>(formatter->Deserialize( stream ));
         stream->Close();
         return img;
      }
   };

   // This example control is associated with the ExampleComponentEditor 
   // through the following EditorAttribute.

   [EditorAttribute(ExampleComponentEditor::typeid,ComponentEditor::typeid)]
   public ref class ExampleUserControl: public System::Windows::Forms::UserControl{};

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Windows.Forms;
using System.Windows.Forms.Design;

// This example demonstrates how to implement a component editor that hosts 
// component pages and associate it with a component. This example also 
// demonstrates how to implement a component page that provides a panel-based 
// control system and Help keyword support.
namespace ComponentEditorExample
{
    // The ExampleComponentEditor displays two ExampleComponentEditorPage pages.
    public class ExampleComponentEditor : System.Windows.Forms.Design.WindowsFormsComponentEditor
    {
        // This method override returns an type array containing the type of 
        // each component editor page to display.
        protected override Type[] GetComponentEditorPages()
        { 
            return new Type[] { typeof(ExampleComponentEditorPage), 
                                typeof(ExampleComponentEditorPage) }; 
        }
    
        // This method override returns the index of the page to display when the 
        // component editor is first displayed.
        protected override int GetInitialComponentEditorPageIndex()
        { 
            return 1; 
        }
    }
    
    // This example component editor page type provides an example 
    // ComponentEditorPage implementation.
    internal class ExampleComponentEditorPage : System.Windows.Forms.Design.ComponentEditorPage
    {
        Label l1; 
        Button b1; 
        PropertyGrid pg1;

        // Base64-encoded serialized image data for the required component editor page icon.
        string icon = "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";

        public ExampleComponentEditorPage()
        {
            // Initialize the page, which inherits from Panel, and its controls.
            this.Size = new Size( 400, 250 );            
            this.Icon = DeserializeIconFromBase64Text(icon);
            this.Text = "Example Page";
            
            b1 = new Button();
            b1.Size = new Size(200, 20);
            b1.Location = new Point(200, 0);
            b1.Text = "Set a random background color";
            b1.Click += new EventHandler(this.randomBackColor);
            this.Controls.Add( b1 );

            l1 = new Label();
            l1.Size = new Size(190, 20);
            l1.Location = new Point(4, 2);
            l1.Text = "Example Component Editor Page";
            this.Controls.Add( l1 );

            pg1 = new PropertyGrid();
            pg1.Size = new Size(400, 280);
            pg1.Location = new Point(0,30);
            this.Controls.Add( pg1 );
        }
        
        // This method indicates that the Help button should be enabled for this 
        // component editor page.
        public override bool SupportsHelp()
        { 
            return true; 
        }

        // This method is called when the Help button for this component editor page is pressed.
        // This implementation uses the IHelpService to show the Help topic for a sample keyword.
        public override void ShowHelp()
        {
            // The GetSelectedComponent method of a ComponentEditorPage retrieves the
            // IComponent associated with the WindowsFormsComponentEditor.
            IComponent selectedComponent = this.GetSelectedComponent();

            // Retrieve the Site of the component, and return if null.
            ISite componentSite = selectedComponent.Site;
            if(componentSite == null)
                return;
 
            // Acquire the IHelpService to display a help topic using a indexed keyword lookup.
            IHelpService helpService = (IHelpService)componentSite.GetService(typeof(IHelpService));
            if (helpService != null)
                helpService.ShowHelpFromKeyword("System.Windows.Forms.ComboBox");
        }

        // The LoadComponent method is raised when the ComponentEditorPage is displayed.
        protected override void LoadComponent()
        { 
            this.pg1.SelectedObject = this.Component; 
        }
    
        // The SaveComponent method is raised when the WindowsFormsComponentEditor is closing 
        // or the current ComponentEditorPage is closing.
        protected override void SaveComponent()
        {
        }

        // If the associated component is a Control, this method sets the BackColor to a random color.
        // This method is invoked by the button on this ComponentEditorPage.
        private void randomBackColor(object sender, EventArgs e)
        {
            if( typeof(System.Windows.Forms.Control).IsAssignableFrom( this.Component.GetType() ) )
            {
                // Sets the background color of the Control associated with the
                // WindowsFormsComponentEditor to a random color.
                Random rnd = new Random();
                ((System.Windows.Forms.Control)this.Component).BackColor = 
                    Color.FromArgb(rnd.Next(255), rnd.Next(255), rnd.Next(255));
                pg1.Refresh();
            }
        }

        // This method can be used to retrieve an Icon from a block 
        // of Base64-encoded text.
        private Icon DeserializeIconFromBase64Text(string text)
        {
            Icon img = null;
            byte[] memBytes = Convert.FromBase64String(text);
            IFormatter formatter = new BinaryFormatter();
            MemoryStream stream = new MemoryStream(memBytes);
            img = (Icon)formatter.Deserialize(stream);
            stream.Close();
            return img;
        }
    }
    
    // This example control is associated with the ExampleComponentEditor 
    // through the following EditorAttribute.
    [EditorAttribute(typeof(ExampleComponentEditor), typeof(ComponentEditor))]
    public class ExampleUserControl : System.Windows.Forms.UserControl
    {
    }
}

Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Collections
Imports System.Drawing
Imports System.IO
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Windows.Forms
Imports System.Windows.Forms.Design

' This example demonstrates how to implement a component editor that hosts 
' component pages and associate it with a component. This example also 
' demonstrates how to implement a component page that provides a panel-based 
' control system and Help keyword support.
' The ExampleComponentEditor displays two ExampleComponentEditorPage pages.
Public Class ExampleComponentEditor
    Inherits System.Windows.Forms.Design.WindowsFormsComponentEditor

    ' This method override returns an type array containing the type of 
    ' each component editor page to display.
    Protected Overrides Function GetComponentEditorPages() As Type()
        Return New Type() {GetType(ExampleComponentEditorPage), GetType(ExampleComponentEditorPage)}
    End Function

    ' This method override returns the index of the page to display when the 
    ' component editor is first displayed.
    Protected Overrides Function GetInitialComponentEditorPageIndex() As Integer
        Return 1
    End Function

    Public Overloads Overrides Function EditComponent(ByVal context As System.ComponentModel.ITypeDescriptorContext, ByVal component As Object) As Boolean

    End Function
End Class

' This example component editor page type provides an example 
' ComponentEditorPage implementation.
Friend Class ExampleComponentEditorPage
    Inherits System.Windows.Forms.Design.ComponentEditorPage
    Private l1 As Label
    Private b1 As Button
    Private pg1 As PropertyGrid

    ' Base64-encoded serialized image data for the required component editor page icon.
    Private icondata As String = "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"

    Public Sub New()
        ' Initialize the page, which inherits from Panel, and its controls.
        Me.Size = New Size(400, 250)
        Me.Icon = DeserializeIconFromBase64Text(icondata)
        Me.Text = "Example Page"

        b1 = New Button
        b1.Size = New Size(200, 20)
        b1.Location = New Point(200, 0)
        b1.Text = "Set a random background color"
        AddHandler b1.Click, AddressOf Me.randomBackColor
        Me.Controls.Add(b1)

        l1 = New Label
        l1.Size = New Size(190, 20)
        l1.Location = New Point(4, 2)
        l1.Text = "Example Component Editor Page"
        Me.Controls.Add(l1)

        pg1 = New PropertyGrid
        pg1.Size = New Size(400, 280)
        pg1.Location = New Point(0, 30)
        Me.Controls.Add(pg1)
    End Sub

    ' This method indicates that the Help button should be enabled for this 
    ' component editor page.
    Public Overrides Function SupportsHelp() As Boolean
        Return True
    End Function

    ' This method is called when the Help button for this component editor page is pressed.
    ' This implementation uses the IHelpService to show the Help topic for a sample keyword.
    Public Overrides Sub ShowHelp()
        ' The GetSelectedComponent method of a ComponentEditorPage retrieves the
        ' IComponent associated with the WindowsFormsComponentEditor.
        Dim selectedComponent As IComponent = Me.GetSelectedComponent()

        ' Retrieve the Site of the component, and return if null.
        Dim componentSite As ISite = selectedComponent.Site
        If componentSite Is Nothing Then
            Return
        End If
        ' Acquire the IHelpService to display a help topic using a indexed keyword lookup.
        Dim helpService As IHelpService = CType(componentSite.GetService(GetType(IHelpService)), IHelpService)
        If (helpService IsNot Nothing) Then
            helpService.ShowHelpFromKeyword("System.Windows.Forms.ComboBox")
        End If
    End Sub

    ' The LoadComponent method is raised when the ComponentEditorPage is displayed.
    Protected Overrides Sub LoadComponent()
        Me.pg1.SelectedObject = Me.Component
    End Sub

    ' The SaveComponent method is raised when the WindowsFormsComponentEditor is closing 
    ' or the current ComponentEditorPage is closing.
    Protected Overrides Sub SaveComponent()
    End Sub

    ' If the associated component is a Control, this method sets the BackColor to a random color.
    ' This method is invoked by the button on this ComponentEditorPage.
    Private Sub randomBackColor(ByVal sender As Object, ByVal e As EventArgs)
        If GetType(System.Windows.Forms.Control).IsAssignableFrom(CType(Me.Component, Object).GetType()) Then
            ' Sets the background color of the Control associated with the
            ' WindowsFormsComponentEditor to a random color.
            Dim rnd As New Random
            CType(Me.Component, System.Windows.Forms.Control).BackColor = Color.FromArgb(rnd.Next(255), rnd.Next(255), rnd.Next(255))
            pg1.Refresh()
        End If
    End Sub

    ' This method can be used to retrieve an Icon from a block 
    ' of Base64-encoded text.
    Private Function DeserializeIconFromBase64Text(ByVal [text] As String) As icon
        Dim img As Icon = Nothing
        Dim memBytes As Byte() = Convert.FromBase64String([text])
        Dim formatter As New BinaryFormatter
        Dim stream As New MemoryStream(memBytes)
        img = CType(formatter.Deserialize(stream), Icon)
        stream.Close()
        Return img
    End Function
End Class

' This example control is associated with the ExampleComponentEditor 
' through the following EditorAttribute.
<EditorAttribute(GetType(ExampleComponentEditor), GetType(ComponentEditor))> _
Public Class ExampleUserControl
    Inherits System.Windows.Forms.UserControl
End Class

Konstruktoren

Methoden

Gilt für

Siehe auch

• ComponentEditorForm
• ComponentEditorPage