DataBinding to an Enumeration RSS

• 

  cheeeeesus

  0 Points

  1 Post

  • Reply
  •  

  DataBinding to an Enumeration

  Aug 20, 2008 09:31 AM | LINK

  Hi folks

  How can I create a DataBinding to an Enumeration value of an object? I.e., I want to have a ListBox (or a ComboBox/DropDownList, as soon as there is one available in Silverlight) and fill it with the enumeration members and DataBind its selection index to a property of my DataContext object which is of the enumeration type.

  In WPF, this is done using

   

  <ObjectDataProvider MethodName="GetValues"
                          ObjectType="{x:Type sys:Enum}"
                          x:Key="AlignmentValues">
    <ObjectDataProvider.MethodParameters>
      <x:Type TypeName="HorizontalAlignment" />
    </ObjectDataProvider.MethodParameters>
  </ObjectDataProvider>

  (see http://msdn.microsoft.com/en-us/library/bb613576.aspx)

  but there is no ObjectDataProvider class in Silverlight.

  Thank you and best regards

  Jonas Sourlier 
  

• 

  mchlSync

  Star

  14968 Points

  2799 Posts

  • Reply
  •  

  Re: DataBinding to an Enumeration

  Aug 24, 2008 07:39 AM | LINK

   I think you have to set the binding from code. Please let me know if you are not able to set it from code behind.
  

  (If this has answered your question, please click on "Mark as Answer" on this post. Thank you!)
  
  Regards,
  Michael Sync
  Silverlight MVP
  
  Blog : http://michaelsync.net
• 

  saavedrah

  Member

  13 Points

  15 Posts

  • Reply
  •  

  Re: DataBinding to an Enumeration

  Nov 29, 2008 04:14 PM | LINK

   Hi there,

   Somebody resolved this issue ??

   Michael said that the binding had to be done in the code. However, he did not say if a converter should be created or how the bind should be done.

   I'm trying to bind an Enum to a ComboBox and it seams that it is not an easy way since the ObjectDataProvider is not available.
  

   Any suggestion is appreciated 
  

   Thanks.

  A sample of the binding to Enum can be found at Brant's WebLog let see how it works for me.
  

• 

  stbuchok

  Member

  65 Points

  21 Posts

  • Reply
  •  

  Re: Re: DataBinding to an Enumeration

  Nov 29, 2008 09:30 PM | LINK

  In Silverlight there is no stratight forward way of iterating through an Enum so they can't be used as a datasource. However there is a way to do it. The following can be used to create an array of Enums and then used in code to fill a control.

  public Enum[] EnumToArray(Enum enumeration)

  {

  //get the enumeration type

  Type et = enumeration.GetType();

  //get the public static fields (members of the enum)

  System.Reflection.FieldInfo[] fi = et.GetFields(BindingFlags.Static | BindingFlags.Public);

  //create a new enum array

  Enum[] values = new Enum[fi.Length];

  //populate with the values

  for (int iEnum = 0; iEnum < fi.Length; iEnum++)

  {

  values[iEnum] = (Enum)fi[iEnum].GetValue(enumeration);

  }

  //return the array

  return values;

  }

   Code to fill a combobox. ScannableField is an Enum in a class called Enums.

  Enum[] enumValues = EnumToArray(new Enums.ScannableField());foreach (Enum enums in enumValues)

  {

  cboScannableField.Items.Add(enums.ToString());

  }

   

  Hope this helps.

• 

  saavedrah

  Member

  13 Points

  15 Posts

  • Reply
  •  

  Re: Re: Re: DataBinding to an Enumeration

  Dec 12, 2008 06:20 PM | LINK

   Thank you,

  It was posible to Bind the enumeration with this change.
  

• 

  snortblt

  Member

  34 Points

  31 Posts

  • Reply
  •  

  Re: Re: DataBinding to an Enumeration

  Oct 08, 2009 10:31 PM | LINK

  Or a little shorter with LINQ: 

  public IEnumerable<Enum> GetEnumValues(Enum enumeration)
  {
      return from f in enumeration.GetType().GetFields(BindingFlags.Static | BindingFlags.Public)
      select (Enum)f.GetValue(enumeration);
  }

   

   

   
• 

  siteman

  Member

  102 Points

  30 Posts

  • Reply
  •  

  Re: Re: DataBinding to an Enumeration

  Oct 08, 2009 11:49 PM | LINK

  This might help you http://blog.bodurov.com/How-to-bind-Silverlight-DataGrid-from-IEnumerable-of-IDictionary

  --SiteMan
  www.silverlightds.com
• 

  LeTrape

  Member

  39 Points

  16 Posts

  • Reply
  •  

  Re: DataBinding to an Enumeration

  Dec 23, 2011 10:25 PM | LINK

  snorblt How do i can call this method