Scheduler in Razor Pages

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

You can use any of the available data binding approaches to bind the component to data in a Razor Pages application.

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 Remote Data

To configure the CRUD operations of the Scheduler DataSource within a Razor Pages application, follow the next steps:

1. Specify the Read, Create, Update, and Destroy options of the DataSource configuration. The URL in each of these options must refer to the method name in the PageModel.

   HtmlHelperTagHelper

   Razor

       @page
       @model IndexModel
   
       @(Html.Kendo().Scheduler<MeetingViewModel>()
           .Name("scheduler")
           .Timezone("Etc/UTC")
           .DataSource(d => d
               .Model(m =>
               {
                   m.Id(f => f.MeetingID);
                   m.Field(f => f.Title).DefaultValue("No title");
                   m.Field(f => f.Start);
                   m.Field(f => f.End);
                   m.Field(f => f.Description);
                   m.Field(f => f.RecurrenceID);
                   m.Field(f => f.RecurrenceRule);
                   m.Field(f => f.RecurrenceException);
                   m.Field(f => f.StartTimezone);
                   m.Field(f => f.EndTimezone);
                   m.Field(f => f.IsAllDay);
               })
               .Read(r => r.Url(Url.Page("Index", "Meetings_Read")).Data("forgeryToken"))
               .Create(c => c.Url(Url.Page("Index", "Meetings_Create")).Data("forgeryToken"))
               .Destroy(d => d.Url(Url.Page("Index", "Meetings_Destroy")).Data("forgeryToken"))
               .Update(u => u.Url(Url.Page("Index", "Meetings_Update")).Data("forgeryToken"))
           )
           ... // Additional configuration options.
       )

   Razor

       @page
       @model IndexModel
       @addTagHelper *, Kendo.Mvc
   
       @{
           string defaultTitle = "No Title";
       }
   
       <kendo-scheduler name="scheduler"
           timezone="Etc/UTC">
           <scheduler-datasource type="@DataSourceTagHelperType.Ajax">
               <transport>
                   <read url="@Url.Page("Index", "Meetings_Read")" data="forgeryToken"/>
                   <create url="@Url.Page("Index", "Meetings_Create")" data="forgeryToken"/>
                   <destroy url="@Url.Page("Index", "Meetings_Destroy")" data="forgeryToken"/>
                   <update url="@Url.Page("Index", "Meetings_Update")" data="forgeryToken"/>
               </transport>
               <schema data="Data" total="Total" errors="Errors">
                   <scheduler-model id="MeetingID">
                       <fields>
                           <field name="MeetingID" type="number"></field>
                           <field name="title" from="Title" type="string" default-value="@defaultTitle"></field>
                           <field name="start" from="Start" type="date"></field>
                           <field name="end" from="End" type="date"></field>
                           <field name="description" from="Description" type="string"></field>
                           <field name="recurrenceId" from="RecurrenceID" type="number" default-value=null></field>
                           <field name="recurrenceRule" from="RecurrenceRule" type="string" ></field>
                           <field name="recurrenceException" from="RecurrenceException" type="string"></field>
                           <field name="startTimezone" from="StartTimezone" type="string"></field>
                           <field name="endTimezone" from="EndTimezone" type="string"></field>
                           <field name="isAllDay" from="IsAllDay" type="boolean"></field>
                       </fields>
                   </scheduler-model>
               </schema>
           </scheduler-datasource>
           <!-- Additional configuration options. -->
       </kendo-scheduler>

2. Add an AntiForgeryToken at the top of the page.

   Razor

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

3. Send the AntiForgeryToken with the CRUD requests.

   JS

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

   Additional parameters can also be supplied.

   JS

       <script>
           function forgeryToken() {
               return {
                   __RequestVerificationToken: kendo.antiForgeryTokens().__RequestVerificationToken,
                   additionalParameter: "test"
               }
           }
       </script>

4. Within the cshtml.cs file, add a handler method for each data operation.

   Index.cshtml.csModel

   C#

   public class IndexModel : PageModel
   {
       public static IList<MeetingViewModel> meetings;
   
       public void OnGet()
       {
           if (meetings == null)
           {
               // Populate the "meetings" collection with data (events).
               meetings = new List<MeetingViewModel>();
               Enumerable.Range(1, 5).ToList().ForEach(x => meetings.Add(new MeetingViewModel()
               {
                   MeetingID = x,
                   Title = "Event " + x,
                   Start = DateTime.Now.AddHours(x * 2),
                   End = DateTime.Now.AddHours(x * 3),
                   Description = "Description for event " + x
               }));
           }
       }
   
       public virtual JsonResult OnPostMeetings_Read([DataSourceRequest] DataSourceRequest request)
       {
           return new JsonResult(meetings.ToDataSourceResult(request));
       }
   
       public virtual JsonResult OnPostMeetings_Create([DataSourceRequest] DataSourceRequest request, MeetingViewModel meeting)
       {
           if (ModelState.IsValid)
           {
               meeting.MeetingID = meetings.Count + 2;
               meetings.Add(meeting);
           }
   
           return new JsonResult(new[] { meeting }.ToDataSourceResult(request, ModelState));
       }
   
       public virtual JsonResult OnPostMeetings_Destroy([DataSourceRequest] DataSourceRequest request, MeetingViewModel meeting)
       {
           if (ModelState.IsValid)
           {
               meetings.Remove(meetings.First(x => x.MeetingID == meeting.MeetingID));
           }
   
           return new JsonResult(new[] { meeting }.ToDataSourceResult(request, ModelState));
       }
   
       public virtual JsonResult OnPostMeetings_Update([DataSourceRequest] DataSourceRequest request, MeetingViewModel meeting)
       {
           if (ModelState.IsValid)
           {
               meetings.Where(x => x.MeetingID == meeting.MeetingID).Select(x => meeting);
           }
   
           return new JsonResult(new[] { meeting }.ToDataSourceResult(request, ModelState));
       }
   }

   C#

       @using Kendo.Mvc.UI;
       @using System.ComponentModel.DataAnnotations;
   
       public class MeetingViewModel : ISchedulerEvent
       {
           public int MeetingID { get; set; }
   
           [Required]
           public string Title { get; set; }
   
           public string Description { get; set; }
           private DateTime start;
   
           [Required]
           public DateTime Start
           {
               get
               {
                   return start;
               }
               set
               {
                   start = value.ToUniversalTime();
               }
           }
   
           public string StartTimezone { get; set; }
           private DateTime end;
   
           [Required]
           [DateGreaterThan(OtherField = "Start")]
           public DateTime End
           {
               get
               {
                   return end;
               }
               set
               {
                   end = value.ToUniversalTime();
               }
           }
   
           public string EndTimezone { get; set; }
           public string RecurrenceRule { get; set; }
           public int? RecurrenceID { get; set; }
           public string RecurrenceException { get; set; }
           public bool IsAllDay { get; set; }
       }

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

See Also

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