Dialog in Razor Pages

Updated on Dec 10, 2025

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

Handling Dialog Actions

The following example demonstrates how to configure Dialog action buttons and handle their click events with AJAX requests to the PageModel in a Razor Pages application.

Razor

@page
@model DialogIndexModel

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

@(Html.Kendo().Dialog()
	.Name("dialog")
	.Title("Data Update")
	.Content("<p>Would you like to confirm updating the data?<p>")
	.Width(400)
	.Modal(false)
	.Actions(actions =>
	{
		actions.Add().Text("Cancel");
		actions.Add().Text("Send data").Primary(true).Action("onSendData");
	})
)

Razor

@page
@model DialogIndexModel

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

<kendo-dialog name="dialog" title="Data Update" width="400" modal="false" >
	<actions>            
		<action text="Cancel">
		</action>
		<action text="Send data" primary="true" action="onSendData">
		</action>
	</actions>
	<content>
		<p>Would you like to confirm updating the data?</p>
	</content>
</kendo-dialog>

JS

<script>
	function onSendData() {
		$.ajax({
			url: "/Dialog/DialogIndex",
			type: "POST",
			data: { custom : "some text" },
			headers: {
				RequestVerificationToken: kendo.antiForgeryTokens().__RequestVerificationToken
			},
			dataType: "json"
		});
	}
</script>

C#

public class DialogIndexModel : PageModel
{
	public void OnGet()
	{

	}

	public void OnPost(string custom)
	{

	}
}

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

See Also

• Using Telerik UI for ASP.NET Core in Razor Pages
• Client-Side API of the Dialog
• Server-Side HtmlHelper API of the Dialog
• Server-Side TagHelper API of the Dialog
• Knowledge Base Section