Template / Format for Group Header

Radzen.Blazor Components
1

Hi,

I have a DataGrid which has a Column "LinkedContactId" (int).

I created custom template which is a label using data from a foreign key table to display a company name instead of the ID: LinkedAccount.Contact.Company

So in the grid, I see the company name instead of the ID.

Now, when I enable grouping for this column, I can group which also works fine. However, in the grouping header, it still uses the ID, so it says e.g.:

Linked Contact: 123

I would like to also show the company name here as well instead of the ID which is actually being used for grouping. Is there a simular concept like the column template for the grouping header?

I also tried to set LinkedAccount.Contact.Company as GroupingProperty but this fails since not every record in the table has a value set for LinkedAccount and therefore, I get a null ref exeception.

Any ideas how to "format" the group header/label?

Thanks!

2

As any other C# expression you can use null check operator when accessing sub properties - i.e. ?.

3

That was also my first thought but this seems not to work on GroupPropertry. I get this error:

System.ArgumentException: 'LinkedAccount?' is not a member of type 'MyApp.Models.MyAppData.Account' (Parameter 'propertyOrFieldName')

I tried these expressions for GroupProperty:

LinkedAccount?.Contact.Company
LinkedAccount.Contact?.Company
LinkedAccount?.Contact?.Company

They all fail because the field with the ? operator attached is not recognized.

4

There is such expression in this demo: