Parent data source

[Leszek]

Hi,

I'd like to access the parent data source from a column template. Something like this:

<telerik:GridTemplateColumn DataField="Number" HeaderText="Number">
    <ItemTemplate>
        <%# ((MyCollection)Parent.DataSource).MyProperty %>
    </ItemTemplate>
</telerik:GridTemplateColumn>

where MyCollection represents a class I use to populate RadGrid and MyProperty is a property of this class that I'd like to access.

Is it possible to accomplish that?

Thanks,
Leszek

[Eyup]

Hi Leszek,

Generally, the respective GridDataItem in this context is called Container:

<telerik:GridTemplateColumn DataField="Number" HeaderText="Number">
    <ItemTemplate>
        <%#  DataBinder.Eval(Container.DataItem, "Freight") %>
    </ItemTemplate>
</telerik:GridTemplateColumn>

In this scenario you can also use the ItemDataBound event handler to execute any custom logic.

Hope this helps.

Regards,
Eyup
Telerik

 

 

[Leszek]

Thanks Eyup for your response. Maybe I was not clear enough: what I need is access to the 'parent' (i.e., a collection used to populate the grid) rather than the item itself. Is the "Container" what I'm looking for? Following your example, would the following code work? :

<telerik:GridTemplateColumn DataField="Number" HeaderText="Number">
    <ItemTemplate>
        <%#  DataBinder.Eval(((MyCollection)Container), "MyProperty") %>
    </ItemTemplate>
</telerik:GridTemplateColumn>

The idea is to bind to a property of the collection itself rather than to its data item.

Thanks,
Leszek

[Eyup]

Hello Leszek,

In this case you can try to use a programmatic approach:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
    if (e.Item is GridDataItem)
    {
        GridDataItem item = e.Item as GridDataItem;
        var dataItem = e.Item.DataItem;
        // execute custom logic to access the underlying data
    }
}

Once you have the value, you can set the Text of the cell or change the property of a template control using FindControl, e.g. Label.

That should do the trick.

Regards,
Eyup
Telerik