ComboBox中的网格列和行

Question

I have 30 items in comboBox. I'm looking for the way to add columns and rows in a combobox.
Here is what I want to do:

The combobox have 4 columns, 7 rows (row = itemCount/columns).
Item class:

public class ItemSymbol{
   public string ImageName{
     get; set;
   }

   public string Comment{
     get; set;
   }
}

ViewModel:

List<ItemSymbol> lstsymbol=new List<ItemSymbol>(30){
  new ItemSymbol(){ImageName=@"Resources\bunny.png",Comment="funny"},
  new ItemSymbol(){ImageName=@"Resources\hand.png",Comment="communication"},
  new ItemSymbol(){ImageName=@"Resources\heart1.png",Comment="love"},
  new ItemSymbol(){ImageName=@"Resources\heart2.png",Comment="love"}
};

Window1.xaml:

<ComboBox x:Name="cbo" 
 ItemsSource="{Binding lstsymbol}" 
 SelectedItem="{Binding SelectedItem}">
 <ComboBox.ItemTemplate>
  <DataTemplate>
    <StackPanel Orientation="Vertical">
     <Image Width="30" Height="30"
      Source="{Binding ImageRes}" Margin="5" ToolTip="{Binding Comment}"/>
    </StackPanel>
  </DataTemplate>
 </ComboBox.ItemTemplate>
</ComboBox>

Answer 1

Add this element to your Combobox in XAML:

<ComboBox.ItemsPanel>
    <ItemsPanelTemplate>
        <UniformGrid Rows="7" Columns="4" />
    </ItemsPanelTemplate>
</ComboBox.ItemsPanel>

(But you know that 7x4 is less then 30?) :-)