Problem with grouping items c#

Question

How can I gruop items in a listbox  according to size in brackets.... example to group according to name we use  GroupBy(name=>name)

how to about size  in bracket   ex    

AAAA[3]

BBBB[2]

CCCC[5]

and then to goup like that
CCCC[5]

AAAA[3]

BBBB[2]

thanx

Answer 1

If you can use the GoupBy() in C# codem that is one C#/Linq question, not a WPF.

If you want to know how to group it and show in the ListBox that can show the items in specific groups. That is one WPF question, and you could view below articles about the grouping in WPF:

http://karlshifflett.wordpress.com/2009/06/10/wpf-sample-series-listbox-grouping-sorting-subtotals-and-collapsible-regions/

And the sample:

<Window x:Class="WpfApplication9.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
  <Grid>
    <Grid.Resources>
      <CollectionViewSource x:Key="source" Source="{Binding}">
        <CollectionViewSource.GroupDescriptions>
          <PropertyGroupDescription PropertyName="Size"/>
        </CollectionViewSource.GroupDescriptions>
      </CollectionViewSource>
    </Grid.Resources>
    <ListBox ItemsSource="{Binding Source={StaticResource source}}">
      <ListBox.GroupStyle>
        <GroupStyle>
          <GroupStyle.HeaderTemplate>
            <DataTemplate>
              <TextBlock Text="{Binding Name}"/>
            </DataTemplate>
          </GroupStyle.HeaderTemplate>
        </GroupStyle>
      </ListBox.GroupStyle>
      <ListBox.ItemTemplate>
        <DataTemplate>
          <TextBlock>
            <TextBlock.Inlines>
              <Run Text="{Binding Name}"/>
              <Run Text="("/>
              <Run Text="{Binding Size}"/>
              <Run Text=")"/>
            </TextBlock.Inlines>
          </TextBlock>
        </DataTemplate>
      </ListBox.ItemTemplate>
    </ListBox>
  </Grid>
</Window>

C#:

  public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();
      this.DataContext = new ObservableCollection<Item>()
      {
        new Item(){Name="AAAA", Size=3},
        new Item(){Name="BBBB", Size=2},
        new Item(){Name="CCCC", Size=3},
        new Item(){Name="DDDD", Size=5},
        new Item(){Name="EEEE", Size=3},
        new Item(){Name="FFFF", Size=4},
        new Item(){Name="GGGG", Size=2},
        new Item(){Name="XXXX", Size=5},
        new Item(){Name="VVVV", Size=4}
      };
    }
  }

  public class Item
  {
    public string Name { get; set; }
    public int Size { get; set; }
  }

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Bob Bao [MSFT]
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