Incremental filtering issues in combobox column

[Marius]

Hi,
I am using a GridViewComboBoxColumn with incremental filtering:                                   

<telerik:GridViewComboBoxColumn Width="auto"
Header="{localization:Translate Key=Ressource_libelleRess,
Default='Libellé Ressource'}"
DataMemberBinding="{Binding RessourceMoyensID, Mode=TwoWay}"
ItemsSource="{Binding ListRessourceMoyens}"
DisplayMemberPath="Value.LibelleRessource"
SelectedValueMemberPath="Value.RessourceMoyensID"
IsComboBoxEditable="True">
<telerik:GridViewComboBoxColumn.EditorStyle>
<Style TargetType="telerik:RadComboBox">
<Setter Property="IsFilteringEnabled" Value="True"/>
<Setter Property="TextSearchMode" Value="Contains"/>
<Setter Property="IsReadOnly" Value="True"/>
<Setter Property="StaysOpenOnEdit" Value="True"/>
<Setter Property="OpenDropDownOnFocus" Value="True"/>
</Style>
</telerik:GridViewComboBoxColumn.EditorStyle>
</telerik:GridViewComboBoxColumn>

When I have many items in the combobox (170 in one case, 6000 in another):
1. The filtering doesn't seem to work correctly (from 8 correct elements as in the DB, it shows me 5 correct and other 5 incorrect)
2. For the big one, there are performance issues (one lettre filters in 2-3 seconds).

Have you any solution to this?

Thanks in advance,

[Valeri Hristov]

Hello Marius,

We are not aware of similar bugs with the filtering. Could you please, send us a simple project that can be used to observe the problem?

The second issue with the performance is actually expected as the control is not virtualized by default - you need to follow the instructions below in order to improve the performance of RadComboBox when it contains hundreds or thousands of items:
http://www.telerik.com/help/silverlight/radcombobox-howto-virtualization.html

Please, note however, that if you enable the virtualization, the filtering will not work correctly.

Greetings,
Valeri Hristov
the Telerik team