I have a DataGrid bound to a class where one of the properties is of a run-time Enum type created using EnumBuilder.  I wish to have the Column automatically detect the enumerators in the enum and display them in a drop-down box on the cell (a ComboBox).

I understand that if the enum was defined at design-time, I can use the following XAML code to do this:

  <ObjectDataProvider x:Key="myEnumValues" MethodName="GetValues" ObjectType="{x:Type sys:Enum}">
    <ObjectDataProvider.MethodParameters>
      <x:Type TypeName="local:MyClass+MyEnum" />
    </ObjectDataProvider.MethodParameters>
  </ObjectDataProvider>

  ...

  <xcdg:Column>
    <xcdg:Column.ForeignKeyConfiguration>
      <xcdg:ForeignKeyConfiguration ItemsSource="{Binding Source={StaticResource myEnumValues}}" />
    </xcdg:Column.ForeignKeyConfiguration>
  </xcdg:Column>

However, how can I achieve the same when I have a property of Enum type in MyClass which I assign using the following code in MyClass constructor?:

  MyEnum = (Enum)Activator.CreateInstance(myEnumBuilder.CreateType());

And yes, this does need to be a run-time Enum.  Any help greatly appreciated.  Thanks!

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Associate, .NET Development
Morgan Stanley, UK

If the enum property is exposed, you can simply bind to it as such in the ForeignKeyConfiguration:

<xcdg:Column.ForeignKeyConfiguration>

    <xcdg:ForeignKeyConfiguration ItemsSource="{Binding Path=OccupationValues}" />

</xcdg:Column.ForeignKeyConfiguration>

public string[] OccupationValues

{

  get

  {

    return Enum.GetNames( typeof( Occupation ) );

  }

} 

---

Senior Technical Writer
- Xceed Software

In three words I can sum up everything I've learned about life: it goes on.

Jenny:

   <xcdg:ForeignKeyConfiguration ItemsSource="{Binding Path=OccupationValues}" />
</xcdg:Column.ForeignKeyConfiguration>

I wonder to which this Binding inside the  ForeignKeyConfigurationis relative to? The business object which forms the datarow?

---

/\/\arkus.

The window's DataContext is set to itself in the ctor of the window; therefore, the binding refers to the OccupationValues property defined on the window.

---

Senior Technical Writer
- Xceed Software

In three words I can sum up everything I've learned about life: it goes on.

I cannot get this working at all.

This is my XAML:

<Page x:Class="WpfTestProject.Page1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid"
    xmlns:s="clr-namespace:System;assembly=mscorlib"
    Title="Page1">
  <Grid>
    <Grid.Resources>
      <xcdg:DataGridCollectionViewSource x:Key="MySource"
                                         Source="{Binding RelativeSource={RelativeSource AncestorType={x:Type Page}}, Path=MyData}"
                                         AutoCreateForeignKeyDescriptions="True">
      </xcdg:DataGridCollectionViewSource>
    </Grid.Resources>
    <xcdg:DataGridControl Name="grid"
                          EditTriggers="BeginEditCommand,ActivationGesture,ClickOnCurrentCell"
                          ItemsSource="{Binding Source={StaticResource MySource}}"
                          AutoCreateForeignKeyConfigurations="True">
      <xcdg:DataGridControl.Columns>
        <xcdg:Column FieldName="Prop1">
          <xcdg:Column.ForeignKeyConfiguration>
            <xcdg:ForeignKeyConfiguration ItemsSource="{Binding Path=AlertEvents}" />
          </xcdg:Column.ForeignKeyConfiguration>
        </xcdg:Column>
      </xcdg:DataGridControl.Columns>
    </xcdg:DataGridControl>
  </Grid>
</Page>

This is my code-behind:

namespace WpfTestProject
{
    public enum MyEnum
    {
        Enum1,
        Enum12
    }

    public partial class Page1 : Page
    {
        public Page1()
        {
            InitializeComponent();

        }

        public IEnumerable MyData
        {
            get
            {
                List<MyClass> dataList = new List<MyClass>();
                dataList.Add(new MyClass());
                return dataList;
            }
        }

        public string[] AlertEvents
        {
            get
            {
                return Enum.GetNames(typeof(MyEnum));
            }
        }
    }

    public class MyClass
    {
        public MyEnum Prop1
        {
            get
            {
                return MyEnum.Enum1;
            }
            set
            {
            }
        }
    }
}

The combobox that shows in the DataGrid for the Prop1 field doesn't have any items in it. What am I doing wrong? Of course, once I have this working, I wish to make Prop1 into a run-time Enum created by EnumBuilder.

Thanks for any help!
Jason

---

Associate, .NET Development
Morgan Stanley, UK

I am thinking you probably have an error in your output window in regards to the AlertEvents property not being found. Change the binding to point to the Page and the values should appear in the combobox.

---

Senior Technical Writer
- Xceed Software

In three words I can sum up everything I've learned about life: it goes on.

I have changed the ForeignKeyConfiguration to this:

<xcdg:ForeignKeyConfiguration ItemsSource="{Binding RelativeSource={RelativeSource AncestorType={x:Type Page}}, Path=AlertEvents}" /> 

However, this still doesn't seem to be finding it.  I guess I'm doing something blatantly wrong?...

---

Associate, .NET Development
Morgan Stanley, UK

Any ideas?  Am still struggling with this...

---

Associate, .NET Development
Morgan Stanley, UK

No errors in the output window? 

Send me an application that demonstrates this behavior and I will investigate further.  

---

Senior Technical Writer
- Xceed Software

In three words I can sum up everything I've learned about life: it goes on.

Yes, I get an error in the output window, but your solution you suggested didn't work:

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=AlertEvents; DataItem=null; target element is 'ForeignKeyConfiguration' (HashCode=6480969); target property is 'ItemsSource' (type 'IEnumerable')

---

Associate, .NET Development
Morgan Stanley, UK

I've attached an example of this problem occurring.

---

Associate, .NET Development
Morgan Stanley, UK

I ran the provided sample and changed the definition for the Prop1 property to the following:

private MyEnum m_enum; 

    public MyEnum Prop1

    {

      get

      {

        return m_enum;

      }

      set

      {

        m_enum = value;

      }

    } 

 

Even without changing the property definition, the combobox appeared with the appropriate values and there were no binding errors in the output window. Can you tell me the exact version of the control that you are using? 

---

Senior Technical Writer
- Xceed Software

In three words I can sum up everything I've learned about life: it goes on.

Version 3.2.9279.15050.

---

Associate, .NET Development
Morgan Stanley, UK

Send me an email (belandj@xceed.com) and I will send you the latest service pack, which is not yet publicly available. Maybe that is the cause of the issue.

---

Senior Technical Writer
- Xceed Software

In three words I can sum up everything I've learned about life: it goes on.

Close but no cigar.

The updated version you sent me fixes the issue of the DataGrid auto-detecting the enumerators of the enum property type (thus the combobox is populated with values from the design-time enum), but it still doesn't read the values from AlertEvents, which is what I need in order to make the property a run-time Enum type.  In fact, I still get the same error in the 'Output' window and if I change the type of Prop1 to Enum instead of MyEnum, the combobox shows no items.

---

Associate, .NET Development
Morgan Stanley, UK