Question

xaml

<controls:TabControl x:Name="tabControlRoom" Grid.Row="1" Grid.Column="1" d:LayoutOverrides="Width, Height" ItemsSource="{Binding}" >
            <controls:TabControl.ItemTemplate>
                <DataTemplate>
                    <controls:TabItem Header="{Binding name}">
                        <StackPanel Margin="10" Orientation="Horizontal">

                        </StackPanel>
                    </controls:TabItem>
                </DataTemplate>
            </controls:TabControl.ItemTemplate>
        </controls:TabControl>

and code

m_roomContext.Load(m_roomContext.GetRoomQuery());
                tabControlRoom.DataContext = m_roomContext.Rooms;

when I open this page, then there is all the elements, but a second later I see only a white screen

error:

load operation failed for query
‘GetRoom’. Unable to cast object of
type ‘Web.Room’ to type
‘System.Windows.Controls.TabItem’/’

Answer 1

Create converter

public class SourceToTabItemsConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            try
            {
                var source = (IEnumerable)value;
                if (source != null)
                {
                    var controlTemplate = (ControlTemplate)parameter;

                    var tabItems = new List<TabItem>();

                    foreach (object item in source)
                    {
                        PropertyInfo[] propertyInfos = item.GetType().GetProperties();

                        //тут мы выбираем, то поле которое будет Header. Вы должны сами вводить это значение.
                        var propertyInfo = propertyInfos.First(x => x.Name == "name");

                        string headerText = null;
                        if (propertyInfo != null)
                        {
                            object propValue = propertyInfo.GetValue(item, null);
                            headerText = (propValue ?? string.Empty).ToString();
                        }

                        var tabItem = new TabItem
                                          {
                                              DataContext = item,
                                              Header = headerText,
                                              Content =
                                                  controlTemplate == null
                                                      ? item
                                                      : new ContentControl { Template = controlTemplate }
                                          };

                        tabItems.Add(tabItem);
                    }

                    return tabItems;
                }
                return null;
            }
            catch (Exception)
            {
                return null;
            }
        }

        /// <summary>
        /// ConvertBack method is not supported
        /// </summary>
        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotSupportedException("ConvertBack method is not supported");
        }

Create ControlTemplate:

<ControlTemplate x:Key="MyTabItemContentTemplate">
            <StackPanel>
                <TextBlock Text="{Binding Path=name}" />
            </StackPanel>
        </ControlTemplate>

And binding convert, controltemplate

<controls:TabControl  x:Name="tabControl"
        ItemsSource="{Binding ElementName=tabControl, 
                              Path=DataContext, 
                              Converter={StaticResource ConverterCollectionToTabItems}, 
                              ConverterParameter={StaticResource MyTabItemContentTemplate}}">
        </controls:TabControl>

taken from the blog binding-tabcontrol