Column Filter not activated when using converter binding

[Manas]

Hello there,
the column filter is not getting activated for a grid column when it is using a converter for it's binding. In this column case the RelatedOrderIDs property returns a List<string> and the converter converts it to a comma separated string. The data is being populated and I can see the CSV string in the column but the filter icon does not appear in the column header.

<telerik:GridViewDataColumn Header="Related Orders" DataMemberBinding="{Binding RelatedOrdeIDs}" Width="200" ShowFieldFilters="True">
    <telerik:GridViewDataColumn.CellTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding RelatedOrdeIDs, Converter={StaticResource listToStringCSVConverter}}" ToolTipService.ToolTip="{Binding RelatedOrdeIDs, Converter={StaticResource listToStringConverter}}" />
            </StackPanel>
        </DataTemplate>
    </telerik:GridViewDataColumn.CellTemplate>
</telerik:GridViewDataColumn>

Can you please help?

Thanks,
Manas

[Dimitrina]

Hello Manas,

 In order to have filtering you need to bind the data column to comparable data types. When you bind to List<string> the filtering does not know how to compare two objects of this type and that is why there is not filtering. When you apply a converter it is changing the value at visual level only, the original associated object is still List<string>.

The best approach when you want to have the inbuilt filtering and sorting is to use simple data objects like string and bind directly to them. 

I hope that this could solve your problem. If you have other questions regarding filtering, please do not hesitate to contact us.

Regards,

Didie
the Telerik team