[Solved] Assign default values while creating new Item

[Tomas]

I have two Grids with Master->Details relationship. These to grids are loaded using Ajax Binding. I want to create new Item in Details grid and pass ProductId field value from Master grid.
I have added property below but do not know how to get ProductId from Master grid. I have tried to pass value using ViewBag on Detail child loading it it seems ViewBag is not assigned then Ajax call is performed. Maybe someone know how to solve this problem?

    Editable(editing => editing.DefaultDataItem(new UserViewModel { ProductId = ?????? })

[Dadv]

Do you try  Editable(editing => editing.DefaultDataItem(new UserViewModel { ProductId = <#= ProductId #> })  ? 

[Tomas]

What is this <#= ProductId #> 
I am using Razor and do not understand what ProductId should be. I do not know how to access selected item values of Master grid from Child grid while creating new record.

[Dadv]

You were talking about Master/Detail so I thought that you were using the built in functionality ...

Edit: Razor has nothing to do with <#= #> it's a Telerik notation for client side template (ajax binding)

[Tomas]

I just tried to assign Id of the Master grid to Child new item model but <#= Id #> is not parsed by Grid. I get <#= Id #> string in FirstName  property. As I understand I should get Id of the selected Master grid item?

Editable(editing => editing.DefaultDataItem(new UserViewModel { FirstName = "<#= Id #>" }))