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Switch in Razor Pages

Updated on Oct 28, 2026

This article describes how to seamlessly integrate and configure the Telerik UI Switch 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.

Binding to a PageModel Property

To bind the Switch to a property from the PageModel, follow the next steps:

Add a property to the PageModel that must bind to the Switch.

public class IndexModel : PageModel
{
    [BindProperty]
    public bool IsChecked { get; set; }

    public void OnGet()
    {
        IsChecked = true;
    }
}

Declare the PageModel at the top of the page.
Razor
```
    @page
    @model IndexModel
```

Bind the Switch to the property using the SwitchFor() configuration.

Razor
@page
@model IndexModel

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

@(Html.Kendo().SwitchFor(m => m.IsChecked))
Razor
@page
@model IndexModel

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

<kendo-switch for="IsChecked"></kendo-switch>

Binding to a Nested Property

The for attribute accepts a model expression, including a nested Boolean property. For example, if the PageModel has a Patient property with a NoEmail property, bind the Switch as follows:

C#
public class IndexModel : PageModel
{
    [BindProperty]
    public PatientViewModel Patient { get; set; } = new PatientViewModel();
}

public class PatientViewModel
{
    public bool NoEmail { get; set; }
}
Razor
<kendo-switch for="Patient.NoEmail"></kendo-switch>

The generated field name is Patient.NoEmail, which allows the value to bind to the nested property when the form is submitted. The SwitchFor HtmlHelper supports the equivalent expression:

Razor

@(Html.Kendo().SwitchFor(m => m.Patient.NoEmail))

If a checkbox remains visible instead of being transformed into a Switch, inspect the rendered markup and browser console. The Switch is initialized on a checkbox input, so a visible checkbox can indicate that the Kendo UI scripts or styles are not loaded, the Switch initialization script did not run, or the generated ID is not unique. These checks are separate from the model-binding path.

For the complete project, refer to the Switch in Razor Pages example.

Switch in Razor Pages

Referencing Handler Methods in Razor Pages

Binding to a PageModel Property

Binding to a Nested Property

See Also