PropertyTabAttribute-Klasse
Gibt die Registerkarten für Eigenschaften an, die für die angegebenen Klassen angezeigt werden sollen.
Namespace: System.ComponentModel
Assembly: System (in system.dll)
Syntax
'Declaration
<AttributeUsageAttribute(AttributeTargets.All)> _
Public Class PropertyTabAttribute
Inherits Attribute
'Usage
Dim instance As PropertyTabAttribute
[AttributeUsageAttribute(AttributeTargets.All)]
public class PropertyTabAttribute : Attribute
[AttributeUsageAttribute(AttributeTargets::All)]
public ref class PropertyTabAttribute : public Attribute
/** @attribute AttributeUsageAttribute(AttributeTargets.All) */
public class PropertyTabAttribute extends Attribute
AttributeUsageAttribute(AttributeTargets.All)
public class PropertyTabAttribute extends Attribute
Hinweise
Einer Registerkarte für Eigenschaften können weitere Registerkarten für Eigenschaften hinzugefügt werden, um neben den Standardeigenschaften weitere Eigenschafteninformationen zur Verfügung zu stellen.
Beispiel
Im folgenden Codebeispiel wird veranschaulicht, wie das PropertyTabAttribute verwendet wird, um eine Registerkarte für Eigenschaften anzugeben.
Imports System
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.IO
Imports System.Reflection
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Windows.Forms
Imports System.Windows.Forms.Design
' This component adds a TypeCategoryTab to the property browser
' that is available for any components in the current design mode document.
<PropertyTabAttribute(GetType(TypeCategoryTab), PropertyTabScope.Document)> _
Public Class TypeCategoryTabComponent
Inherits System.ComponentModel.Component
Public Sub New()
End Sub
End Class
' A TypeCategoryTab property tab lists properties by the
' category of the type of each property.
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Public Class TypeCategoryTab
Inherits PropertyTab
' This string contains a Base-64 encoded and serialized example property tab image.
<BrowsableAttribute(True)> _
Private img As String = "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"
Public Sub New()
End Sub
' Returns the properties of the specified component extended with
' a CategoryAttribute reflecting the name of the type of the property.
Public Overloads Overrides Function GetProperties(ByVal component As Object, ByVal attributes() As System.Attribute) As System.ComponentModel.PropertyDescriptorCollection
Dim props As PropertyDescriptorCollection
If attributes Is Nothing Then
props = TypeDescriptor.GetProperties(component)
Else
props = TypeDescriptor.GetProperties(component, attributes)
End If
Dim propArray(props.Count - 1) As PropertyDescriptor
Dim i As Integer
For i = 0 To props.Count - 1
' Create a new PropertyDescriptor from the old one, with
' a CategoryAttribute matching the name of the type.
propArray(i) = TypeDescriptor.CreateProperty(props(i).ComponentType, props(i), New CategoryAttribute(props(i).PropertyType.Name))
Next i
Return New PropertyDescriptorCollection(propArray)
End Function
Public Overloads Overrides Function GetProperties(ByVal component As Object) As System.ComponentModel.PropertyDescriptorCollection
Return Me.GetProperties(component, Nothing)
End Function
' Provides the name for the property tab.
Public Overrides ReadOnly Property TabName() As String
Get
Return "Properties by Type"
End Get
End Property
' Provides an image for the property tab.
Public Overrides ReadOnly Property Bitmap() As System.Drawing.Bitmap
Get
Dim bmp As New Bitmap(DeserializeFromBase64Text(img))
Return bmp
End Get
End Property
' This method can be used to retrieve an Image from a block of Base64-encoded text.
Private Function DeserializeFromBase64Text(ByVal [text] As String) As Image
Dim img As Image = Nothing
Dim memBytes As Byte() = Convert.FromBase64String([text])
Dim formatter As New BinaryFormatter()
Dim stream As New MemoryStream(memBytes)
img = CType(formatter.Deserialize(stream), Image)
stream.Close()
Return img
End Function
End Class
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.IO;
using System.Reflection;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Windows.Forms;
using System.Windows.Forms.Design;
namespace TypeCategoryTabExample
{
// This component adds a TypeCategoryTab to the propery browser
// that is available for any components in the current design mode document.
[PropertyTabAttribute(typeof(TypeCategoryTab), PropertyTabScope.Document)]
public class TypeCategoryTabComponent : System.ComponentModel.Component
{
public TypeCategoryTabComponent()
{
}
}
// A TypeCategoryTab property tab lists properties by the
// category of the type of each property.
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
public class TypeCategoryTab : PropertyTab
{
[BrowsableAttribute(true)]
// This string contains a Base-64 encoded and serialized example property tab image.
private string img = "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";
public TypeCategoryTab()
{
}
// Returns the properties of the specified component extended with
// a CategoryAttribute reflecting the name of the type of the property.
public override System.ComponentModel.PropertyDescriptorCollection GetProperties(object component, System.Attribute[] attributes)
{
PropertyDescriptorCollection props;
if( attributes == null )
props = TypeDescriptor.GetProperties(component);
else
props = TypeDescriptor.GetProperties(component, attributes);
PropertyDescriptor[] propArray = new PropertyDescriptor[props.Count];
for(int i=0; i<props.Count; i++)
{
// Create a new PropertyDescriptor from the old one, with
// a CategoryAttribute matching the name of the type.
propArray[i] = TypeDescriptor.CreateProperty(props[i].ComponentType, props[i], new CategoryAttribute(props[i].PropertyType.Name));
}
return new PropertyDescriptorCollection( propArray );
}
public override System.ComponentModel.PropertyDescriptorCollection GetProperties(object component)
{
return this.GetProperties(component, null);
}
// Provides the name for the property tab.
public override string TabName
{
get
{
return "Properties by Type";
}
}
// Provides an image for the property tab.
public override System.Drawing.Bitmap Bitmap
{
get
{
Bitmap bmp = new Bitmap(DeserializeFromBase64Text(img));
return bmp;
}
}
// This method can be used to retrieve an Image from a block of Base64-encoded text.
private Image DeserializeFromBase64Text(string text)
{
Image img = null;
byte[] memBytes = Convert.FromBase64String(text);
IFormatter formatter = new BinaryFormatter();
MemoryStream stream = new MemoryStream(memBytes);
img = (Image)formatter.Deserialize(stream);
stream.Close();
return img;
}
}
}
#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::IO;
using namespace System::Reflection;
using namespace System::Runtime::Serialization;
using namespace System::Runtime::Serialization::Formatters::Binary;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::Design;
using namespace System::Security::Permissions;
namespace TypeCategoryTabExample
{
ref class TypeCategoryTab;
// forward declaration.
// This component adds a TypeCategoryTab to the propery browser
// that is available for any components in the current design mode document.
[PropertyTabAttribute(TypeCategoryTabExample::TypeCategoryTab::typeid,PropertyTabScope::Document)]
public ref class TypeCategoryTabComponent: public System::ComponentModel::Component
{
public:
TypeCategoryTabComponent(){}
};
// A TypeCategoryTab property tab lists properties by the
// category of the type of each property.
public ref class TypeCategoryTab: public PropertyTab
{
private:
// This String^ contains a Base-64 encoded and serialized example property tab image.
[BrowsableAttribute(true)]
String^ img;
public:
TypeCategoryTab()
{
img = "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";
}
// Returns the properties of the specified component extended with
// a CategoryAttribute reflecting the name of the type of the property.
[ReflectionPermission(SecurityAction::Demand, Flags=ReflectionPermissionFlag::MemberAccess)]
virtual System::ComponentModel::PropertyDescriptorCollection^ GetProperties( Object^ component, array<System::Attribute^>^attributes ) override
{
PropertyDescriptorCollection^ props;
if ( attributes == nullptr )
props = TypeDescriptor::GetProperties( component );
else
props = TypeDescriptor::GetProperties( component, attributes );
array<PropertyDescriptor^>^propArray = gcnew array<PropertyDescriptor^>(props->Count);
for ( int i = 0; i < props->Count; i++ )
{
// Create a new PropertyDescriptor from the old one, with
// a CategoryAttribute matching the name of the type.
array<Attribute^>^temp0 = {gcnew CategoryAttribute( props[ i ]->PropertyType->Name )};
propArray[ i ] = TypeDescriptor::CreateProperty( props[ i ]->ComponentType, props[ i ], temp0 );
}
return gcnew PropertyDescriptorCollection( propArray );
}
virtual System::ComponentModel::PropertyDescriptorCollection^ GetProperties( Object^ component ) override
{
return this->GetProperties( component, nullptr );
}
property String^ TabName
{
// Provides the name for the property tab.
virtual String^ get() override
{
return "Properties by Type";
}
}
property System::Drawing::Bitmap^ Bitmap
{
// Provides an image for the property tab.
virtual System::Drawing::Bitmap^ get() override
{
System::Drawing::Bitmap^ bmp = gcnew System::Drawing::Bitmap( DeserializeFromBase64Text( img ) );
return bmp;
}
}
private:
// This method can be used to retrieve an Image from a block of Base64-encoded text.
Image^ DeserializeFromBase64Text( String^ text )
{
Image^ img = nullptr;
array<Byte>^memBytes = Convert::FromBase64String( text );
IFormatter^ formatter = gcnew BinaryFormatter;
MemoryStream^ stream = gcnew MemoryStream( memBytes );
img = dynamic_cast<Image^>(formatter->Deserialize( stream ));
stream->Close();
return img;
}
};
}
Vererbungshierarchie
System.Object
System.Attribute
System.ComponentModel.PropertyTabAttribute
Threadsicherheit
Alle öffentlichen statischen (Shared in Visual Basic) Member dieses Typs sind threadsicher. Bei Instanzmembern ist die Threadsicherheit nicht gewährleistet.
Plattformen
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 unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0