Backend API
import React from 'react';
import Scheduler from 'devextreme-react/scheduler';
import type { SchedulerTypes } from 'devextreme-react/scheduler';
import * as AspNetData from 'devextreme-aspnet-data-nojquery';
import { HubConnectionBuilder, HttpTransportType } from '@aspnet/signalr';
const BASE_PATH = 'https://js.devexpress.com/Demos/NetCore/';
const url = `${BASE_PATH}api/SchedulerSignalR`;
const createStore = () => AspNetData.createStore({
key: 'AppointmentId',
loadUrl: url,
insertUrl: url,
updateUrl: url,
deleteUrl: url,
onBeforeSend(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
});
const store1 = createStore();
const store2 = createStore();
const currentDate = new Date(2021, 3, 27);
const views: SchedulerTypes.ViewType[] = ['day', 'workWeek'];
const connection = new HubConnectionBuilder()
.withUrl(`${BASE_PATH}schedulerSignalRHub`, {
skipNegotiation: true,
transport: HttpTransportType.WebSockets,
})
.build();
connection
.start()
.then(() => {
connection.on('update', (key, data) => {
store1.push([{ type: 'update', key, data }]);
store2.push([{ type: 'update', key, data }]);
});
connection.on('insert', (data) => {
store1.push([{ type: 'insert', data }]);
store2.push([{ type: 'insert', data }]);
});
connection.on('remove', (key) => {
store1.push([{ type: 'remove', key }]);
store2.push([{ type: 'remove', key }]);
});
});
const App = () => (
<div className="schedulers">
<div className="column-1">
<Scheduler
timeZone="America/Los_Angeles"
dataSource={store1}
views={views}
defaultCurrentView="day"
defaultCurrentDate={currentDate}
height={600}
startDayHour={9}
endDayHour={19}
remoteFiltering={true}
dateSerializationFormat="yyyy-MM-ddTHH:mm:ssZ"
textExpr="Text"
startDateExpr="StartDate"
descriptionExpr="Description"
endDateExpr="EndDate"
allDayExpr="AllDay"
/>
</div>
<div className="column-2">
<Scheduler
timeZone="America/Los_Angeles"
dataSource={store2}
views={views}
defaultCurrentView="day"
defaultCurrentDate={currentDate}
height={600}
startDayHour={9}
endDayHour={19}
remoteFiltering={true}
dateSerializationFormat="yyyy-MM-ddTHH:mm:ssZ"
textExpr="Text"
startDateExpr="StartDate"
endDateExpr="EndDate"
allDayExpr="AllDay"
/>
</div>
</div>
);
export default App;
import React from 'react';
import Scheduler from 'devextreme-react/scheduler';
import * as AspNetData from 'devextreme-aspnet-data-nojquery';
import { HubConnectionBuilder, HttpTransportType } from '@aspnet/signalr';
const BASE_PATH = 'https://js.devexpress.com/Demos/NetCore/';
const url = `${BASE_PATH}api/SchedulerSignalR`;
const createStore = () =>
AspNetData.createStore({
key: 'AppointmentId',
loadUrl: url,
insertUrl: url,
updateUrl: url,
deleteUrl: url,
onBeforeSend(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
});
const store1 = createStore();
const store2 = createStore();
const currentDate = new Date(2021, 3, 27);
const views = ['day', 'workWeek'];
const connection = new HubConnectionBuilder()
.withUrl(`${BASE_PATH}schedulerSignalRHub`, {
skipNegotiation: true,
transport: HttpTransportType.WebSockets,
})
.build();
connection.start().then(() => {
connection.on('update', (key, data) => {
store1.push([{ type: 'update', key, data }]);
store2.push([{ type: 'update', key, data }]);
});
connection.on('insert', (data) => {
store1.push([{ type: 'insert', data }]);
store2.push([{ type: 'insert', data }]);
});
connection.on('remove', (key) => {
store1.push([{ type: 'remove', key }]);
store2.push([{ type: 'remove', key }]);
});
});
const App = () => (
<div className="schedulers">
<div className="column-1">
<Scheduler
timeZone="America/Los_Angeles"
dataSource={store1}
views={views}
defaultCurrentView="day"
defaultCurrentDate={currentDate}
height={600}
startDayHour={9}
endDayHour={19}
remoteFiltering={true}
dateSerializationFormat="yyyy-MM-ddTHH:mm:ssZ"
textExpr="Text"
startDateExpr="StartDate"
descriptionExpr="Description"
endDateExpr="EndDate"
allDayExpr="AllDay"
/>
</div>
<div className="column-2">
<Scheduler
timeZone="America/Los_Angeles"
dataSource={store2}
views={views}
defaultCurrentView="day"
defaultCurrentDate={currentDate}
height={600}
startDayHour={9}
endDayHour={19}
remoteFiltering={true}
dateSerializationFormat="yyyy-MM-ddTHH:mm:ssZ"
textExpr="Text"
startDateExpr="StartDate"
endDateExpr="EndDate"
allDayExpr="AllDay"
/>
</div>
</div>
);
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
import 'anti-forgery';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
import 'anti-forgery';
ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html>
<html lang="en">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" />
<script src="../signalr-session-id.js"></script>
<link rel="stylesheet" type="text/css" href="./bundle.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
<script src="bundles/vendor/react.vendor.js"></script>
<script src="./bundle.js"></script>
</body>
</html>
.schedulers {
display: flex;
}
.column-1 {
padding-right: 5px;
}
.column-2 {
padding-left: 5px;
}
.dx-scheduler-small .dx-scheduler-view-switcher.dx-tabs {
display: table;
}
using DevExtreme.AspNet.Data;
using DevExtreme.AspNet.Mvc;
using DevExtreme.MVC.Demos.Hubs;
using DevExtreme.MVC.Demos.Models;
using Microsoft.AspNet.SignalR;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Web;
using System.Web.Http;
namespace DevExtreme.MVC.Demos.Controllers.ApiControllers {
public class SchedulerSignalRController : ApiController {
InMemoryAppointmentsDataContext _data = new InMemoryAppointmentsDataContext();
IHubContext hubContext;
public SchedulerSignalRController() {
hubContext = GlobalHost.ConnectionManager.GetHubContext<SchedulerSignalRHub>();
}
[HttpGet]
public HttpResponseMessage Get(DataSourceLoadOptions loadOptions) {
return Request.CreateResponse(DataSourceLoader.Load(_data.Appointments, loadOptions));
}
[HttpPost]
public HttpResponseMessage Post(FormDataCollection form) {
var values = form.Get("values");
var newAppointment = new Appointment();
JsonConvert.PopulateObject(values, newAppointment);
Validate(newAppointment);
if(!ModelState.IsValid)
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState.GetFullErrorMessage());
_data.Appointments.Add(newAppointment);
_data.SaveChanges();
var groupName = GetGroupName();
if(groupName != null) {
hubContext.Clients.Group(GetGroupName()).insert(newAppointment);
}
return Request.CreateResponse(HttpStatusCode.Created);
}
[HttpPut]
public HttpResponseMessage Put(FormDataCollection form) {
var key = Convert.ToInt32(form.Get("key"));
var values = form.Get("values");
var appointment = _data.Appointments.First(a => a.AppointmentId == key);
JsonConvert.PopulateObject(values, appointment);
Validate(appointment);
if(!ModelState.IsValid)
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState.GetFullErrorMessage());
_data.SaveChanges();
var groupName = GetGroupName();
if(groupName != null) {
hubContext.Clients.Group(GetGroupName()).update(key, appointment);
}
return Request.CreateResponse(HttpStatusCode.OK);
}
[HttpDelete]
public void Delete(FormDataCollection form) {
var key = Convert.ToInt32(form.Get("key"));
var appointment = _data.Appointments.First(a => a.AppointmentId == key);
_data.Appointments.Remove(appointment);
_data.SaveChanges();
var groupName = GetGroupName();
if(groupName != null) {
hubContext.Clients.Group(GetGroupName()).remove(key);
}
}
string GetGroupName() {
var cookie = Request.Headers.GetCookies(SchedulerSignalRHub.GroupIdKey).FirstOrDefault();
if(cookie != null) {
return cookie[SchedulerSignalRHub.GroupIdKey].Value;
}
return null;
}
}
}
using System;
using System.Threading.Tasks;
using System.Web;
using Microsoft.AspNet.SignalR;
using DevExpress.Data.Utils;
namespace DevExtreme.MVC.Demos.Hubs {
public class SchedulerSignalRHub : Hub {
public static string GroupIdKey = "dx-SchedulerSignalRHub-groupId";
private static readonly NonCryptographicRandom random = NonCryptographicRandom.System;
public override Task OnConnected() {
Cookie cookie;
Context.RequestCookies.TryGetValue(GroupIdKey, out cookie);
string groupId;
if(cookie != null) {
groupId = cookie.Value;
} else {
groupId = random.Next(0, int.MaxValue).ToString();
var newCookie = new HttpCookie(GroupIdKey, groupId);
Context.Request.GetHttpContext().Response.Cookies.Add(newCookie);
}
Groups.Add(Context.ConnectionId, groupId);
return base.OnConnected();
}
}
}
Follow the steps below to implement this functionality. Note again that this demo repeats all steps twice for the two Schedulers. Your project will have a single control and a single store.
-
Configure a CustomStore. In this demo, we use the createStore method (part of the DevExtreme.AspNet.data extension).
-
Create the Scheduler and use its dataSource property to bind it to the store instance.
-
When a push notification is received, call the store's push(changes) method to update the store's data (see the
connection.onevent handlers).
For server-side configuration, refer to the ASP.NET MVC version of this demo.
For more information about integration with push services, refer to the following help topic: Integration with Push Services.