Telerik UI Filter in Razor Pages

Razor Pages are an alternative to the MVC pattern. Razor Pages make page-focused coding easier and more productive. This approach consists of a cshtml file and a cs file (generally, the two files have the same name). You can seamlessly integrate the Telerik UI Filter for ASP.NET Core in Razor Pages applications.

For a runnable example, refer to the Filter in RazorPages example.

Getting Started

To configure the Telerik UI Filter widget within a RazorPage:

1. Configure the Read URL in the DataSource. The URL in these methods must refer to the method name in the PageModel:

       @(Html.Kendo().DataSource<CustomerViewModel>()
           .Name("dataSource1")
               .Ajax(t =>
                       {
                   t.Read(r=>r.Url("/Filter/FilterBinding?handler=Customers").Data("forgeryToken"));
                   t.Model(model => model.Id(p => p.CustomerID));
                   t.PageSize(20);
               })
       )
   
       @(Html.Kendo().Filter<CustomerViewModel>()
           .Name("filter")
           .ApplyButton(true)
           .ExpressionPreview(true)
           .Fields(f =>
           {
               f.Add(p=>p.CustomerID);
               f.Add(p=>p.Position);
               f.Add(p=>p.CompanyName);
               f.Add(p=>p.Country);
           })
           .FilterExpression(f => {
               f.Add(p => p.Position).IsEqualTo("Sales Representative");
           })
           .DataSource("dataSource1")
       )
   

2. Add an AntiForgeryToken at the top of the RazorPage:

       @inject Microsoft.AspNetCore.Antiforgery.IAntiforgery Xsrf
       @Html.AntiForgeryToken()
   

3. Send the AntiForgeryToken with each POST request of the page. Additional parameters can also be supplied:

       <script>
           function forgeryToken() {
               return kendo.antiForgeryTokens();
           }
       </script>
   

4. Within the .cs file, introduce ActionMethod for the Read operation

       public JsonResult OnPostCustomers([DataSourceRequest]DataSourceRequest request)
       {
           return new JsonResult(Customers.ToDataSourceResult(request)); // Where Customers is a colection of objects 
       }
   

See Also

• Server-Side API