How to display multi-valued fields in GridView

[Rajani]

Hello,

I'm using a radgridview and need to display a column that supports multiple values. For example I have a field "Supported Languages" that can take multiple values such as "English, Arabic, French" .. What type of datacolumn should I be  using to display this data? I tried using the ComboBoxColumn, however it requires separate bindings for the ItemsSource and DisplayMemberPath. I'm trying to avoid using concatenated strings. Please advise.

Thanks.

[Dimitrina]

Hello,

You can predefine the CellTemplate of the column as explained in this help article. Then you can place any control/controls there to serve your needs.

Kind regards,
Didie
the Telerik team

[Rajani]

Thank you Didie. The article you sent helps. I have two related questions though:

1) Will applying a cell template affect performance if I'm expecting a huge data set of 50,000 records? I thought I read somewhere that its not recommended to apply cell templates.

2) Another related question is about grouping.. I had posted a question at http://www.telerik.com/community/forums/wpf/gridview/ability-to-group-on-column-with-comma-seperated-values.aspx. I want to be able to group my multi-valued column based on the values .. is that possible .. For example :

Id    Fruits     
1     Apple, Banana
2     Banana, Strawberry
3    Apple, Orange

Grouping on Fruits should display as below:

Fruits
    Apple
        1    Apple, Banana
        3    Apple, Orange
    Banana
        1    Apple, Banana
        2    Banana, Strawberry
    Orange
        3    Apple, Orange
    Strawberry
        2    Banana, Strawberry

[Dimitrina]

Hello,

In general I would suggest you to go through the Degraded Performance and the Tips and Tricks help articles suggesting on how you could improve the performance.

I am afraid that the GridView does not support such custom grouping scenario. You need to have a property to be grouped on as explained in our online documentation. 

Regards,
Didie
the Telerik team