Autocomplete Error object reference not set to an instant of an object

Hello, How to grouping data in autocomplete
in OnInitialized i wrote these code.
PTs = PDdb.PlanTemplates.ToList();

Hi @rathapon,

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I get error when i type in autocomplate box.

.razor and model


Help me please.

I'm unable to provide more info by just looking at your screenshots. Please debug your application to check what's null. If you have Radzen subscription you can send us an example application demonstrating the exception at

I can solve it.It's error becuase having null value in TemplaName List.