Drop down filter in template column

[Richard]

Hi,

I have created a template column and bound it to a RadGrid.

However, I would like to implement drop down filtering on the column as you describe here:

http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/filtering/filter-templates/defaultcs.aspx

Can you clarify if this is possible to achieve using a grid template column?

I raised a support ticket about this back in Feb 2016 and got the following response:

Hello Richard,

Thank you for contacting us.

You can add a RadComboBox control as a filter item of the TemplateColumn the same way as you did with a BoundColumn. Generally you need to implement a FilterItemTemplate and use pretty much the same approach as the one from the demo.

I hope this information helps. 

Regards,
Kostadin 
Telerik

I have tried this approach and I get problems. Could you please show me an example or post some code here?

Here is the definition of my Template column:

            GridTemplateColumn templateColumn = new GridTemplateColumn();
            templateColumn.ItemTemplate = new GenericGridLinkedItemTemplateColumn(columnName, displayName, listName, lookupType, ActiveColumnName, ItemActiveValue, popoverUrl, itemType, headerText.Replace(" ", string.Empty), genericGridUrl, tab);
            templateColumn.UniqueName = columnName;
            templateColumn.HeaderText = headerText;
            templateColumn.AllowFiltering = true;
            templateColumn.CurrentFilterFunction = GridKnownFunction.Contains;
            templateColumn.AutoPostBackOnFilter = true;
            templateColumn.ShowFilterIcon = false;
            templateColumn.DataField = columnName;

At the moment it renders a text box to filter by, I would like to change it to a dropdown list.

[Richard]

Please note: I need a completely programmatic example i.e. c# code.

[Eyup]

Hello Richard,

As you've already mentioned, you want to achieve something similar to the implementation demonstrated in the following live sample:
http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/filtering/filter-templates/defaultcs.aspx

You can also examine the first web site from this post:
http://www.telerik.com/forums/how-to-persist-dropdownlist-selected-index-and-value-on-postback-from-radgrid-filtertemplate#GW3MyQLmVEmy8XzsmrHzeQ

As for creating the filter template programmatically, you can use the ItemCreated event handler provided by the grid. I am sending a web site to demonstrate this implementation.

Regards,
Eyup
Telerik by Progress