Use the LoadData event to get data from a REST service.
    In this demo the Employees are loaded from an OData service with the Title and Customers columns using multi-select dropdown filters with FilterTemplate to query related data from the server.
ID  | First Namefilter_alt  | Last Namefilter_alt  | Titlefilter_alt  | Customersfilter_alt  | Title Of Courtesyfilter_alt  | Birth Datefilter_alt  | Hire Datefilter_alt  | Addressfilter_alt  | Cityfilter_alt  | Regionfilter_alt  | Postal Codefilter_alt  | Countryfilter_alt  | Home Phonefilter_alt  | Extensionfilter_alt  | Notesfilter_alt  | 
|---|
1. Set the Data and Count properties.
<RadzenDataGrid Count="@count" Data="@employees"
        
            2. Handle the LoadData event and update the Data and Count backing fields (employees and count in this case).
        
async Task LoadData(LoadDataArgs args)
{
    var result = await service.GetEmployees(filter: args.Filter, top: args.Top, skip: args.Skip, orderby: args.OrderBy, count: true);
    employees = result.Value.AsODataEnumerable();
    count = result.Count;
}
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