PropertyValueUIHandler Délégué

Définition

Représente la méthode qui ajoute un délégué à une implémentation de IPropertyValueUIService.Represents the method that adds a delegate to an implementation of IPropertyValueUIService.

public delegate void PropertyValueUIHandler(ITypeDescriptorContext ^ context, PropertyDescriptor ^ propDesc, ArrayList ^ valueUIItemList);
public delegate void PropertyValueUIHandler(ITypeDescriptorContext context, PropertyDescriptor propDesc, ArrayList valueUIItemList);
type PropertyValueUIHandler = delegate of ITypeDescriptorContext * PropertyDescriptor * ArrayList -> unit
Public Delegate Sub PropertyValueUIHandler(context As ITypeDescriptorContext, propDesc As PropertyDescriptor, valueUIItemList As ArrayList)

Paramètres

context
ITypeDescriptorContext

ITypeDescriptorContext pouvant être utilisé pour obtenir des informations de contexte.An ITypeDescriptorContext that can be used to obtain context information.

propDesc
PropertyDescriptor

PropertyDescriptor représentant la propriété faisant l'objet d'une requête.A PropertyDescriptor that represents the property being queried.

valueUIItemList
ArrayList

ArrayList d'objets PropertyValueUIItem contenant les éléments d'interface utilisateur associés à la propriété.An ArrayList of PropertyValueUIItem objects containing the UI items associated with the property.

Exemples

L’exemple de code suivant illustre la création d’une PropertyValueUIHandler méthode de gestionnaire d’événements qui fournit PropertyValueUIItem des objets pour toutes les propriétés nommées HorizontalMargin ou VerticalMargin .This following code example demonstrates creating a PropertyValueUIHandler event handler method that provides PropertyValueUIItem objects for any properties named HorizontalMargin or VerticalMargin.

// PropertyValueUIHandler delegate that provides PropertyValueUIItem
// objects to any properties named horizontalMargin or verticalMargin.
void marginPropertyValueUIHandler( System::ComponentModel::ITypeDescriptorContext^ /*context*/, System::ComponentModel::PropertyDescriptor^ propDesc, ArrayList^ itemList )
{
   // A PropertyValueUIHandler added to the IPropertyValueUIService
   // is queried once for each property of a component and passed
   // a PropertyDescriptor that represents the characteristics of
   // the property when the Properties window is set to a new
   // component. A PropertyValueUIHandler can determine whether
   // to add a PropertyValueUIItem for the object to its ValueUIItem
   // list depending on the values of the PropertyDescriptor.
   if ( propDesc->DisplayName->Equals( "horizontalMargin" ) )
   {
      Image^ img = DeserializeFromBase64Text( imageBlob1 );
      itemList->Add( gcnew PropertyValueUIItem( img,gcnew PropertyValueUIItemInvokeHandler( this, &PropertyUIComponent::marginInvoke ),"Test ToolTip" ) );
   }

   if ( propDesc->DisplayName->Equals( "verticalMargin" ) )
   {
      Image^ img = DeserializeFromBase64Text( imageBlob1 );
      img->RotateFlip( RotateFlipType::Rotate90FlipNone );
      itemList->Add( gcnew PropertyValueUIItem( img,gcnew PropertyValueUIItemInvokeHandler( this, &PropertyUIComponent::marginInvoke ),"Test ToolTip" ) );
   }
}
// PropertyValueUIHandler delegate that provides PropertyValueUIItem
// objects to any properties named HorizontalMargin or VerticalMargin.
private void marginPropertyValueUIHandler(System.ComponentModel.ITypeDescriptorContext context, System.ComponentModel.PropertyDescriptor propDesc, ArrayList itemList)
{
    // A PropertyValueUIHandler added to the IPropertyValueUIService
    // is queried once for each property of a component and passed
    // a PropertyDescriptor that represents the characteristics of 
    // the property when the Properties window is set to a new 
    // component. A PropertyValueUIHandler can determine whether 
    // to add a PropertyValueUIItem for the object to its ValueUIItem 
    // list depending on the values of the PropertyDescriptor.
    if( propDesc.DisplayName.Equals( "HorizontalMargin" ) )
    {
        Image img = DeserializeFromBase64Text(imageBlob1);
        itemList.Add( new PropertyValueUIItem( img, new PropertyValueUIItemInvokeHandler(this.marginInvoke), "Test ToolTip") );
    }
    if( propDesc.DisplayName.Equals( "VerticalMargin" ) )
    {
        Image img = DeserializeFromBase64Text(imageBlob1);
        img.RotateFlip(RotateFlipType.Rotate90FlipNone);
        itemList.Add( new PropertyValueUIItem( img, new PropertyValueUIItemInvokeHandler(this.marginInvoke), "Test ToolTip") );
    }
}
' PropertyValueUIHandler delegate that provides PropertyValueUIItem
' objects to any properties named HorizontalMargin or VerticalMargin.
Private Sub marginPropertyValueUIHandler(ByVal context As System.ComponentModel.ITypeDescriptorContext, ByVal propDesc As System.ComponentModel.PropertyDescriptor, ByVal itemList As ArrayList)
    ' A PropertyValueUIHandler added to the IPropertyValueUIService
    ' is queried once for each property of a component and passed
    ' a PropertyDescriptor that represents the characteristics of 
    ' the property when the Properties window is set to a new 
    ' component. A PropertyValueUIHandler can determine whether 
    ' to add a PropertyValueUIItem for the object to its ValueUIItem 
    ' list depending on the values of the PropertyDescriptor.
    If propDesc.DisplayName.Equals("HorizontalMargin") Then
        Dim img As Image = DeserializeFromBase64Text(imageBlob1)
        itemList.Add(New PropertyValueUIItem(img, New PropertyValueUIItemInvokeHandler(AddressOf Me.marginInvoke), "Test ToolTip"))
    End If
    If propDesc.DisplayName.Equals("VerticalMargin") Then
        Dim img As Image = DeserializeFromBase64Text(imageBlob1)
        img.RotateFlip(RotateFlipType.Rotate90FlipNone)
        itemList.Add(New PropertyValueUIItem(img, New PropertyValueUIItemInvokeHandler(AddressOf Me.marginInvoke), "Test ToolTip"))
    End If
End Sub

Remarques

Quand ce délégué est appelé, il peut ajouter un PropertyValueUIItem contenant des éléments d’interface utilisateur pour la propriété spécifiée à l’objet ArrayList passé comme valueUIItemList paramètre.When this delegate is invoked, it can add a PropertyValueUIItem containing UI items for the specified property to the ArrayList passed as the valueUIItemList parameter.

Méthodes d’extension

GetMethodInfo(Delegate)

Obtient un objet qui représente la méthode représentée par le délégué spécifié.Gets an object that represents the method represented by the specified delegate.

S’applique à

Voir aussi