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copied!<ol> <li><p>Two options - a.) The not-so-pretty: set a fixed height in the TextBlock or b) put the items inside a Grid like this:</p> <pre><code><ComboBox ... Grid.IsSharedSizeScope="True"> <ComboBox.ItemTemplate> <DataTemplate> <Grid> <Grid.RowDefinistions> <RowDefinition Height="Auto" SharedSizeGroup="Row"/> <Grid.RowDefinistions> <TextBlock .../> <Grid> <DataTemplate> <ComboBox.ItemTemplate> </code></pre></li> <li><p>Again - two options: a) Set a fixed width of the TextBlock in the DataTemplate. b) If you replace the VirtualizingStackPanel with a StackPanel and do the same for the ColumnDefinition above (this will be a performance problem if you have a lot in your list as it will create all visual elements when loading.</p></li> <li><p>Put VerticalAlignment="Center" in the TextBlock inside the DataTemlate.</p></li> </ol> <p>Hope this helps.</p> <p>EDIT: </p> <p>Thanks :). I'll give you a few hints:</p> <p>When using the VirtualizingStackPanel, in almost all cases you should set VirtualizationMode="Recycling" - same goes for the other ItemsControls by the way:</p> <pre><code><ListBox VirtualizingStackPanel.VirtualiationMode="Recycling"/> <VirtualizingStackPanel VirtualizationMode="Recycling"/> </code></pre> <p>This will recycle the DataTemplate's when the user scrolls through the list. Especially in large datasets or with complex DataTemplates this will give a considerable smoother experience. IsEditable="True" destroys this benefit (It's a known bug).</p> <p>Normally when you only want to use one property as the DataTemplate, you can use the DisplayMemberPath - and this will give you keyboard accelerators (typing 'T' will scroll to the first item beginning with T etc.) If you use DataTemplates - you can achieve the same by using TextSearch.TextPath. Just remember to sort the items in the combobox to the same property that you use in the TextPath - otherwise, users are in for a 'bumpy' experience as it will seemingly randomly jump about the list.</p> <p>If you want to color every second item in the list - you can achieve this as follows:</p> <pre><code><UserControl.Resources> <Style TargetType="{x:Type ComboBoxItem}"> <Style.Triggers> <Trigger Property="ItemsControl.AlternationIndex" Value="1"> <Setter Property="Background" Value="LightGray"/> </Trigger> </Style.Triggers> </Style> </UserControl.Resources> <ComboBox AlternationCount="2"> </code></pre> <p>Actually, I don't really use the ComboBox that much - mostly, I use it for Enum-values and very small datasets. The problem with the ComboBox is that it supports paging very poorly - with large datasets I normally use the AutoCompleteBox from the WPF Toolkit or a ListBox with a TextBox above it for filtering.</p> <p>Hope, you got a few hints in there :-)</p>

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