How to bind a string ObservableCollection to combobox in wpf DataGridTemplateColumn.

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.NET

WPF

Silverlight

.NET4.5

Hi All,

I am unable to figure out what I am doing wrong. i have the following code in my model.

private ObservableCollection<string> _metadataFieldList = new ObservableCollection<string>();
        public ObservableCollection<string> MetadaFieldList
        {
            get { return _metadataFieldList; }
            set
            {
                _metadataFieldList = value;
            }
        }

The following code in the viewmodel

List<string> lst = new DirectoryInfo(fullFolderPath).GetDirectories("*", SearchOption.AllDirectories)
                .Select(x => x.FullName).ToList();

            model.MetadaFieldList = new ObservableCollection<string>(lst);

and the following in my xaml markup.

<DataGridTemplateColumn Width="Auto">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox SelectedValue="{Binding Path=FieldName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
                                ItemsSource="{Binding Path=MetadaFieldList}">
                            </ComboBox>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

The combobox is always empty and and the ItemsSource is null.

Thanks in advance for any help.

Zafar