DataGrid nested filtering


I'm creating a lot of grid for an admin system i'm doing. But i'm having issue with nested filtering.
It works fine for 1 lvl when setting the property like this: Car.Registration

However, if i need to go one level futher, it doesn't work anymore. Like this: Car.ApiCar.Brand


As you can see on the image the filter is just an empty string. There is however a FilterDescriptor

Can anyone help me out here?

I'm unable to reproduce such problem:

@using System.Linq.Dynamic.Core

<RadzenDataGrid AllowSorting="true" AllowFiltering="true" AllowPaging="true" Data="@orders" Count="@count" TItem="Order" LoadData="@LoadData">
        <RadzenDataGridColumn TItem="Order" Property="OrderId" Title="OrderId" />
        <RadzenDataGridColumn TItem="Order" Property="OrderDetail.OrderDetailId" Title="OrderDetailId" />
        <RadzenDataGridColumn TItem="Order" Property="OrderDetail.Product.ProductId" Title="ProductId" />

@code {
    IEnumerable<Order> data = Enumerable.Range(0, 100).Select(i =>
            new Order()
                    OrderId = i,
                    OrderDetail = new OrderDetail()
                        OrderDetailId = i * 2,
                        Product = new Product()
                            ProductId = i * 4
    int count;
    IEnumerable<Order> orders;

    void LoadData(LoadDataArgs args)
        var query = data.AsQueryable();

        if (!string.IsNullOrEmpty(args.Filter))
            query = query.Where(args.Filter);

        if (!string.IsNullOrEmpty(args.OrderBy))
            query = query.OrderBy(args.OrderBy);

        count = query.Count();

        orders = query.Skip(args.Skip.Value).Take(args.Top.Value).ToList();

    public class Order
        public int OrderId { get; set; }
        public OrderDetail OrderDetail { get; set; }

    public class OrderDetail
        public int OrderDetailId { get; set; }
        public Product Product { get; set; }

    public class Product
        public int ProductId { get; set; }

Thank you for the reply.
It's weird. It works fine for our Company.User.Name
But not Car.ApiCar.Brand

But as you can see from the image in the first page there is actually a FilterDescriptor in the list, it should have build a filter from ?
Can you explain to me how it works when it builds filters ?

You can check the source code for reference.

Are you expanding the query to include Car.ApiCar?


query = query.Skip(request.Args.Skip.Value).Take(request.Args.Top.Value)
.Include(v => v.Company)
.ThenInclude(v => v.User)
.Include(v => v.Car)
.ThenInclude(v => v.ApiCar);

I've found the issue.
return GetPropertyType(GetPropertyTypeIncludeInterface(type, part), property.Replace($"{part}.", ""));

When my Car.ApiCar.Brand is run through this, it's suddenly ApiBrand, because both instances of "Car." gets replaced

Feel free to submit pull request if you believe you’ve found a bug.

I've created a PR
Method to replace only the first occurence of a string by ChristianA1992 · Pull Request #1028 · radzenhq/radzen-blazor (

I’ve merged your change - it will be part of our next update early next week.