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RadGrid Hierarchy with Object Model

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Scott
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Scott asked on 03 Oct 2008, 04:07 AM
I've tried to search for this and I'm sure it's often requested but I've had no luck finding it via Google or in the docs or examples.  What I want to do is have a grid with hierarchy (something like <DetailTables>)

My object model I'm binding is an IList of Customers which look like this

Customer
  Id
  Name
  Locations typeof(IList)

Each customer should be at the top level of the grid, when the user expands the grid it should return locations.  I've tried to set the DataMember of the DetailTable with no luck.

Most of the examples I see uses SQL statements on the ASPX page, however I already have an object model that's already populated.  I'm using NHibernate but this would be the same as if you were using Entity Framework (EF).  Any help is appreciated.

Thanks

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Vlad
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answered on 03 Oct 2008, 05:57 AM
Hello Scott,

Please check my blog post to know how to achieve this:
http://blogs.telerik.com/VladimirEnchev/Posts/08-08-11/How_To_RadGrid_hierarchy_from_objects_hierarchy.aspx

Kind regards,
Vlad
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Scott
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answered on 03 Oct 2008, 03:47 PM
Great that works, my code looks like this:
        protected void CustomersGrid_DetailTableDataBind(object source, Telerik.Web.UI.GridDetailTableDataBindEventArgs e)
        {
                    e.DetailTableView.DataSource = ((List<LegalEntity>) e.DetailTableView.DataSource).Find(
                        cust => cust.Id == Convert.ToInt32(e.DetailTableView.ParentItem.GetDataKeyValue("Id"))
                        ).Locations;


One more question, can I bind multiple levels in the grid like this?  I don't see how the RadGrid supports more than one level (i.e. Children have Children)

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Sebastian
Telerik team
answered on 06 Oct 2008, 07:37 AM
Hi Scott,

You can check the Name property of the detail table which is about to be bound inside the DetailTableDataBind event handler (note that this property should be set to have unique value beforehand). Review the online demo of RadGrid concerning hierarchy creation with DetailTableDataBind handling for more details:

http://demos.telerik.com/ASPNET/Prometheus/Grid/Examples/Programming/DetailTableDataBind/DefaultCS.aspx

Best regards,
Stephen
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