ComponentEditorPage 类
为 ComponentEditorPage 提供基实现。
**命名空间:**System.Windows.Forms.Design
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）
语法
声明
<ComVisibleAttribute(True)> _
<ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)> _
Public MustInherit Class ComponentEditorPage
Inherits Panel
用法
Dim instance As ComponentEditorPage
[ComVisibleAttribute(true)]
[ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)]
public abstract class ComponentEditorPage : Panel
[ComVisibleAttribute(true)]
[ClassInterfaceAttribute(ClassInterfaceType::AutoDispatch)]
public ref class ComponentEditorPage abstract : public Panel
/** @attribute ComVisibleAttribute(true) */
/** @attribute ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) */
public abstract class ComponentEditorPage extends Panel
ComVisibleAttribute(true)
ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)
public abstract class ComponentEditorPage extends Panel
备注
ComponentEditorPage 类是包含空窗口的组件编辑器页的完整实现。您可以扩展此页以添加自己的控件。ComponentEditorPage 由 WindowsFormsComponentEditor 的 ComponentEditorForm 使用。
示例
下面的代码示例阐释了一个 ComponentEditorPage 实现示例。
' 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 Not (helpService Is 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 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 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;
}
};
.NET Framework 安全性
- NamedPermissionSet 用于对系统资源进行完全访问。要求值：InheritanceDemand。关联状态：FullTrust
继承层次结构
System.Object
System.MarshalByRefObject
System.ComponentModel.Component
System.Windows.Forms.Control
System.Windows.Forms.ScrollableControl
System.Windows.Forms.Panel
System.Windows.Forms.Design.ComponentEditorPage
线程安全
此类型的任何公共静态（Visual Basic 中的 Shared）成员都是线程安全的，但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 2000 SP4、Windows Millennium Edition、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
请参见
参考
ComponentEditorPage 成员
System.Windows.Forms.Design 命名空间
ComponentEditorForm 类
WindowsFormsComponentEditor