Backend API
        
    @model IEnumerable<DevExtreme.NETCore.Demos.Models.Appointment>
@(Html.DevExtreme().Scheduler()
    .ID("scheduler")
    .DataSource(Model)
    .TimeZone("America/Los_Angeles")
    .Views(new[] {
        SchedulerViewType.Day,
        SchedulerViewType.Week
    })
    .CurrentView(SchedulerViewType.Week)
    .CurrentDate(new DateTime(2021, 4, 29))
    .StartDayHour(9)
    .EndDayHour(19)
    .Height(600)
    .Editing(editing =>
        {
            editing.AllowAdding(true);
        editing.AllowDeleting(true);
        editing.AllowUpdating(true);
        editing.AllowResizing(true);
        editing.AllowDragging(true);
    })
    .TextExpr("Text")
    .StartDateExpr("StartDate")
    .EndDateExpr("EndDate")
    .AllDayExpr("AllDay")
    .OnAppointmentAdded(@<text>
            function(e) {
            showToast("Added", e.appointmentData.Text, "success");
            }
    </text>)
.OnAppointmentUpdated(@<text>
            function(e) {
            showToast("Updated", e.appointmentData.Text, "info");
            }
</text>)
.OnAppointmentDeleted(@<text>
        function(e) {
        showToast("Deleted", e.appointmentData.Text, "warning");
        }
</text>)
)
<div class="options">
    <div class="caption">Options</div>
    <div class="options-container">
        <div class="option">
            @(Html.DevExtreme().CheckBox()
                .Text("Allow adding")
                .Value(true)
                .OnValueChanged(@<text>
                    function(e) {
                        getSchedulerInstance().option("editing.allowAdding", e.value);
                    }
                </text>)
            )
        </div>
        <div class="option">
            @(Html.DevExtreme().CheckBox()
                .Text("Allow deleting")
                .Value(true)
                .OnValueChanged(@<text>
                    function(e) {
                        getSchedulerInstance().option("editing.allowDeleting", e.value);
                    }
                </text>)
            )
        </div>
        <div class="option">
            @(Html.DevExtreme().CheckBox()
                .Text("Allow updating")
                .Value(true)
                .OnValueChanged(@<text>
                    function(e) {
                        getSchedulerInstance().option("editing.allowUpdating", e.value);
                        $("#allow-resizing").dxCheckBox("instance").option("disabled", !e.value);
                        $("#allow-dragging").dxCheckBox("instance").option("disabled", !e.value);
                    }
                </text>)
            )
        </div>
        <div class="option">
            @(Html.DevExtreme().CheckBox()
                .ID("allow-resizing")
                .Text("Allow resizing")
                .Value(true)
                .OnValueChanged(@<text>
                    function(e) {
                        getSchedulerInstance().option("editing.allowResizing", e.value);
                    }
                </text>)
            )
        </div>
        <div class="option">
            @(Html.DevExtreme().CheckBox()
                .ID("allow-dragging")
                .Text("Allow dragging")
                .Value(true)
                .OnValueChanged(@<text>
                    function(e) {
                        getSchedulerInstance().option("editing.allowDragging", e.value);
                    }
                </text>)
            )
        </div>
    </div>
</div>
<script>
    function getSchedulerInstance() {
        return $("#scheduler").dxScheduler("instance");
    }
    function showToast(event, value, type) {
        DevExpress.ui.notify(event + " \"" + value + "\"" + " task", type, 800);
    }
</script>
        
        using Microsoft.AspNetCore.Mvc;
using DevExtreme.NETCore.Demos.Models.SampleData;
using DevExtreme.NETCore.Demos.ViewModels;
namespace DevExtreme.NETCore.Demos.Controllers {
    public class SchedulerController : Controller {
        public ActionResult Editing() {
            return View(SampleData.Appointments);
        }
    }
}
        
        using System;
using System.Text.Json.Serialization;
namespace DevExtreme.NETCore.Demos.Models {
    public class Appointment {
        [JsonPropertyName("AppointmentId")]
        public int AppointmentId { get; set; }
        [JsonPropertyName("Text")]
        public string Text { get; set; }
        [JsonPropertyName("Description")]
        public string Description { get; set; }
        [JsonPropertyName("StartDate")]
        public string StartDate { get; set; }
        [JsonPropertyName("EndDate")]
        public string EndDate { get; set; }
        [JsonPropertyName("AllDay")]
        public bool AllDay { get; set; }
        [JsonPropertyName("RecurrenceRule")]
        public string RecurrenceRule { get; set; }
        [JsonPropertyName("RecurrenceException")]
        public string RecurrenceException { get; set; }
    }
    public class DisableDatesAppointment {
        [JsonPropertyName("AppointmentId")]
        public int AppointmentId { get; set; }
        [JsonPropertyName("Text")]
        public string Text { get; set; }
        [JsonPropertyName("Description")]
        public string Description { get; set; }
        [JsonPropertyName("StartDate")]
        public DateTime StartDate { get; set; }
        [JsonPropertyName("EndDate")]
        public DateTime EndDate { get; set; }
        [JsonPropertyName("AllDay")]
        public bool AllDay { get; set; }
        [JsonPropertyName("RecurrenceRule")]
        public string RecurrenceRule { get; set; }
        [JsonPropertyName("RecurrenceException")]
        public string RecurrenceException { get; set; }
    }
}
        
        using System;
using System.Collections.Generic;
using System.Linq;
namespace DevExtreme.NETCore.Demos.Models.SampleData {
    public partial class SampleData {
        public static readonly IEnumerable<Appointment> Appointments = new[] {
            new Appointment {
                AppointmentId = 1,
                Text = "Website Re-Design Plan",
                StartDate = "2021-04-26T16:30:00.000Z",
                EndDate = "2021-04-26T18:30:00.000Z"
            },
            new Appointment {
                AppointmentId = 2,
                Text = "Book Flights to San Fran for Sales Trip",
                StartDate = "2021-04-26T19:00:00.000Z",
                EndDate = "2021-04-26T20:00:00.000Z",
                AllDay = true
            },
            new Appointment {
                AppointmentId = 3,
                Text = "Install New Router in Dev Room",
                StartDate = "2021-04-26T21:30:00.000Z",
                EndDate = "2021-04-26T22:30:00.000Z"
            },
            new Appointment {
                AppointmentId = 4,
                Text = "Approve Personal Computer Upgrade Plan",
                StartDate = "2021-04-27T17:00:00.000Z",
                EndDate = "2021-04-27T18:00:00.000Z"
            },
            new Appointment {
                AppointmentId = 5,
                Text = "Final Budget Review",
                StartDate = "2021-04-27T19:00:00.000Z",
                EndDate = "2021-04-27T20:35:00.000Z"
            },
            new Appointment {
                AppointmentId = 6,
                Text = "New Brochures",
                StartDate = "2021-04-27T21:30:00.000Z",
                EndDate = "2021-04-27T22:45:00.000Z"
            },
            new Appointment {
                AppointmentId = 7,
                Text = "Install New Database",
                StartDate = "2021-04-28T16:45:00.000Z",
                EndDate = "2021-04-28T18:15:00.000Z"
            },
            new Appointment {
                AppointmentId = 8,
                Text = "Approve New Online Marketing Strategy",
                StartDate = "2021-04-28T19:00:00.000Z",
                EndDate = "2021-04-28T21:00:00.000Z"
            },
            new Appointment {
                AppointmentId = 9,
                Text = "Upgrade Personal Computers",
                StartDate = "2021-04-28T22:15:00.000Z",
                EndDate = "2021-04-28T23:30:00.000Z"
            },
            new Appointment {
                AppointmentId = 10,
                Text = "Customer Workshop",
                StartDate = "2021-04-29T18:00:00.000Z",
                EndDate = "2021-04-29T19:00:00.000Z",
                AllDay = true
            },
            new Appointment {
                AppointmentId = 11,
                Text = "Prepare 2021 Marketing Plan",
                StartDate = "2021-04-29T18:00:00.000Z",
                EndDate = "2021-04-29T20:30:00.000Z"
            },
            new Appointment {
                AppointmentId = 12,
                Text = "Brochure Design Review",
                StartDate = "2021-04-29T21:00:00.000Z",
                EndDate = "2021-04-29T22:30:00.000Z"
            },
            new Appointment {
                AppointmentId = 13,
                Text = "Create Icons for Website",
                StartDate = "2021-04-30T17:00:00.000Z",
                EndDate = "2021-04-30T18:30:00.000Z"
            },
            new Appointment {
                AppointmentId = 14,
                Text = "Upgrade Server Hardware",
                StartDate = "2021-04-30T21:30:00.000Z",
                EndDate = "2021-04-30T23:00:00.000Z"
            },
            new Appointment {
                AppointmentId = 15,
                Text = "Submit New Website Design",
                StartDate = "2021-04-30T23:30:00.000Z",
                EndDate = "2021-05-01T01:00:00.000Z"
            },
            new Appointment {
                AppointmentId = 16,
                Text = "Launch New Website",
                StartDate = "2021-04-30T19:20:00.000Z",
                EndDate = "2021-04-30T21:00:00.000Z"
            }
        };
    }
}
        
        .options {
    padding: 20px;
    background-color: rgba(191, 191, 191, 0.15);
    margin-top: 20px;
}
.caption {
    font-size: 18px;
    font-weight: 500;
}
.option {
    margin-top: 10px;
    display: inline-block;
    width: 19%;
}
.options-container {
    display: flex;
    align-items: center;
}
        
                These operations raise events that you can handle with the following functions:
In this demo, we configured the handlers to display a toast message after a user performs an edit operation.
Users can edit appointment data in the appointment details form. To open it, they need to double-click the appointment. You can use the onAppointmentFormOpening function to customize the form.