PrimarySelectionPolicy.GetPolicyItems Method
Returns the policy item that represents the primary selection.
Namespace: Microsoft.Windows.Design.Policies
Assembly: Microsoft.Windows.Design.Interaction (in Microsoft.Windows.Design.Interaction.dll)
Syntax
'Declaration
Protected Overrides Function GetPolicyItems ( _
selection As Selection _
) As IEnumerable(Of ModelItem)
protected override IEnumerable<ModelItem> GetPolicyItems(
Selection selection
)
protected:
virtual IEnumerable<ModelItem^>^ GetPolicyItems(
Selection^ selection
) override
abstract GetPolicyItems :
selection:Selection -> IEnumerable<ModelItem>
override GetPolicyItems :
selection:Selection -> IEnumerable<ModelItem>
protected override function GetPolicyItems(
selection : Selection
) : IEnumerable<ModelItem>
Parameters
- selection
Type: Microsoft.Windows.Design.Interaction.Selection
The current selection.
Return Value
Type: System.Collections.Generic.IEnumerable<ModelItem>
Either a single element that is the primary selection, or an empty enumeration.
Examples
The following code example shows how to create a custom surrogate policy by implementing the IsSurrogate property and the GetSurrogateItems method. For a full code listing, see How to: Create a Surrogate Policy.
' The DockPanelPolicy class implements a surrogate policy that
' provides container semantics for a selected item. By using
' this policy, the DemoDockPanel container control offers
' additional tasks and adorners on its children.
Class DockPanelPolicy
Inherits PrimarySelectionPolicy
Public Overrides ReadOnly Property IsSurrogate() As Boolean
Get
Return True
End Get
End Property
Public Overrides Function GetSurrogateItems( _
ByVal item As Microsoft.Windows.Design.Model.ModelItem) _
As System.Collections.Generic.IEnumerable( _
Of Microsoft.Windows.Design.Model.ModelItem)
Dim parent As ModelItem = item.Parent
Dim e As New System.Collections.Generic.List(Of ModelItem)
If (parent IsNot Nothing) Then
e.Add(parent)
End If
Return e
End Function
End Class
// The DockPanelPolicy class implements a surrogate policy that
// provides container semantics for a selected item. By using
// this policy, the DemoDockPanel container control offers
// additional tasks and adorners on its children.
class DockPanelPolicy : PrimarySelectionPolicy
{
public override bool IsSurrogate
{
get
{
return true;
}
}
public override IEnumerable<ModelItem> GetSurrogateItems(ModelItem item)
{
ModelItem parent = item.Parent;
if (parent != null)
{
yield return parent;
}
}
}
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
See Also
Reference
Microsoft.Windows.Design.Policies Namespace