# Rating in Razor Pages

This article describes how to seamlessly integrate and configure the Telerik UI Rating for ASP.NET Core in Razor Pages applications.

## Referencing Handler Methods in Razor Pages

Razor Pages is an alternative to the MVC pattern that makes page-focused coding easier and more productive. This approach consists of a `cshtml` file and a `cshtml.cs` file (by convention, the two files have the same name).

The `cshtml.cs` file, known as the `PageModel`, contains handler methods that respond to HTTP requests. These methods are prefixed with `On` followed by the HTTP verb (for example, `OnGet`, `OnPost`, `OnPostRead`, `OnPostCreate`).

Handler methods declared in a `PageModel` can be referenced from any Razor Page using one of the following URL patterns:

* Using `Url.Page()`

  ```C#
  Url.Page("PageName", "HandlerName")
  // OR
  Url.Page("/FolderName/PageName", "HandlerName")
  ```

  For example, `Url.Page("Index", "Read")` references the `OnPostRead` or `OnGetRead` handler method in the `Index.cshtml.cs` file.

* Using a query string

  ```C#
  Url("/PathToPage?handler=HandlerName")
  ```

  For example, `Url("/Index?handler=Read")` references the `OnPostRead` or `OnGetRead` handler method in the `Index` page.

For more information on Razor Pages architecture and concepts, refer to [the official Microsoft documentation](https://learn.microsoft.com/en-us/aspnet/core/razor-pages/).

## Binding to Local Data

The following example demonstrates how to configure the Rating options and value based on properties from the `PageModel`.

```Razor HtmlHelper
    @page
    @model RatingIndexModel

    @inject Microsoft.AspNetCore.Antiforgery.IAntiforgery Xsrf
	@Html.AntiForgeryToken()
	
	@(Html.Kendo().Rating()
		.Name("ratingHalf")
		.Min(Model.Min)
		.Max(Model.Max)
		.Value(Model.Value)
		.Precision(Model.Precision)
	)
```

```Razor TagHelper
    @page
    @model RatingIndexModel

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

    <kendo-rating name="ratingHalf"
        min="@Model.Min"
        max="@Model.Max"
        value="@Model.Value"
        precision="@Model.Precision">
    </kendo-rating>
```

```C# PageModel
public class RatingIndexModel : PageModel
{
	public string Precision { get; set; }
    public int Min { get; set; }
    public int Max { get; set; }
    public double Value { get; set; }

    public void OnGet()
    {
        Min = 1;
        Max = 10;
        Precision = "half";
        Value = 7.5;
    }
}
```

For the complete project, refer to the [Rating in Razor Pages example](https://github.com/telerik/ui-for-aspnet-core-examples/blob/master/Telerik.Examples.RazorPages/Telerik.Examples.RazorPages/Pages/Rating/RatingIndex.cshtml).

## See Also

* [Using Telerik UI for ASP.NET Core in Razor Pages](https://docs.telerik.com/aspnet-core/getting-started/razor-pages#using-telerik-ui-for-aspnet-core-in-razor-pages)
* [Client-Side API of the Rating](https://www.telerik.com/kendo-jquery-ui/documentation/api/ui/rating)
* [Server-Side HtmlHelper API of the Rating](https://www.telerik.com/aspnet-core-ui/documentation/api/rating)
* [Server-Side TagHelper API of the Rating](https://www.telerik.com/aspnet-core-ui/documentation/api/taghelpers/rating)
* [Knowledge Base Section](https://www.telerik.com/aspnet-core-ui/documentation/knowledge-base)