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WPF/Silverlight Attached Property

Example of a WPF/Silverlight Attached Property (AP). This is a port of a C# AP implementation that can be found at http://www.silverlightshow.net/items/Attached-Properties-in-Silverlight.aspx.

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open System.Windows
open System.Windows.Controls

// Example ported from http://www.silverlightshow.net/items/Attached-Properties-in-Silverlight.aspx
type TabPanel() = 
   inherit StackPanel()  
   /// Register the attached property
   static member TabStopProperty = 
       DependencyProperty.RegisterAttached("TabStop", typeof<bool>, typeof<TabPanel>, null) 
   /// Set the property
   static member SetTabStop (element:UIElement, value:obj) =
       let _, boolValue = bool.TryParse (string value)
       element.SetValue(TabPanel.TabStopProperty, boolValue)
   /// Get the property
   static member GetTabStop (element:UIElement) = 
       element.GetValue TabPanel.TabStopProperty

namespace System

namespace System.Windows

Multiple items
type TabPanel =
  inherit obj
  new : unit -> TabPanel
  static member GetTabStop : element:'a -> 'b
  static member SetTabStop : element:'a * value:obj -> 'b
  static member TabStopProperty : 'a

Full name: Script.TabPanel

--------------------
new : unit -> TabPanel

static member TabPanel.TabStopProperty : 'a

Full name: Script.TabPanel.TabStopProperty

Register the attached property

val typeof<'T> : System.Type

Full name: Microsoft.FSharp.Core.Operators.typeof

type bool = System.Boolean

Full name: Microsoft.FSharp.Core.bool

static member TabPanel.SetTabStop : element:'a * value:obj -> 'b

Full name: Script.TabPanel.SetTabStop

Set the property

type obj = System.Object

Full name: Microsoft.FSharp.Core.obj

System.Boolean.TryParse(value: string, result: byref<bool>) : bool

Multiple items
val string : value:'T -> string

Full name: Microsoft.FSharp.Core.Operators.string

--------------------
type string = System.String

Full name: Microsoft.FSharp.Core.string

property TabPanel.TabStopProperty: 'a

Register the attached property

static member TabPanel.GetTabStop : element:'a -> 'b

Full name: Script.TabPanel.GetTabStop

Get the property

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More information

Link:	http://fssnip.net/69
Posted:	7 years ago
Author:	Daniel Mohl
Tags:	wpf , silverlight