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Backend API
$(() => {
const url = 'https://js.devexpress.com/Demos/Mvc/api/DataGridWebApi';
$('#grid').dxDataGrid({
dataSource: DevExpress.data.AspNet.createStore({
key: 'OrderID',
loadUrl: `${url}/Orders`,
insertUrl: `${url}/InsertOrder`,
updateUrl: `${url}/UpdateOrder`,
deleteUrl: `${url}/DeleteOrder`,
onBeforeSend(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
}),
remoteOperations: true,
columns: [{
dataField: 'CustomerID',
caption: 'Customer',
validationRules: [{
type: 'stringLength',
message: 'The field Customer must be a string with a maximum length of 5.',
max: 5,
}],
lookup: {
dataSource: DevExpress.data.AspNet.createStore({
key: 'Value',
loadUrl: `${url}/CustomersLookup`,
onBeforeSend(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
}),
valueExpr: 'Value',
displayExpr: 'Text',
},
}, {
dataField: 'OrderDate',
dataType: 'date',
validationRules: [{
type: 'required',
message: 'The OrderDate field is required.',
}],
}, {
dataField: 'Freight',
headerFilter: {
groupInterval: 100,
},
validationRules: [{
type: 'range',
message: 'The field Freight must be between 0 and 2000.',
min: 0,
max: 2000,
}],
}, {
dataField: 'ShipCountry',
validationRules: [{
type: 'stringLength',
message: 'The field ShipCountry must be a string with a maximum length of 15.',
max: 15,
}],
}, {
dataField: 'ShipVia',
caption: 'Shipping Company',
dataType: 'number',
lookup: {
dataSource: DevExpress.data.AspNet.createStore({
key: 'Value',
loadUrl: `${url}/ShippersLookup`,
onBeforeSend(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
}),
valueExpr: 'Value',
displayExpr: 'Text',
},
},
],
filterRow: {
visible: true,
},
headerFilter: {
visible: true,
},
groupPanel: {
visible: true,
},
scrolling: {
mode: 'virtual',
},
width: '100%',
height: 600,
showBorders: true,
masterDetail: {
enabled: true,
template(container, options) {
$('<div>')
.dxDataGrid({
dataSource: DevExpress.data.AspNet.createStore({
loadUrl: `${url}/OrderDetails`,
loadParams: { orderID: options.data.OrderID },
onBeforeSend(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
}),
showBorders: true,
}).appendTo(container);
},
},
editing: {
allowAdding: true,
allowUpdating: true,
allowDeleting: true,
},
grouping: {
autoExpandAll: false,
},
summary: {
totalItems: [{
column: 'Freight',
summaryType: 'sum',
}],
groupItems: [{
column: 'Freight',
summaryType: 'sum',
}, {
summaryType: 'count',
},
],
},
});
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" 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" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.7/css/dx.light.css" />
<script src="js/dx.all.js"></script>
<script src="https://unpkg.com/devextreme-aspnet-data@4.0.2/js/dx.aspnet.data.js"></script>
<script src="index.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="grid"></div>
</div>
</body>
</html>
using DevExtreme.AspNet.Data;
using DevExtreme.AspNet.Mvc;
using Newtonsoft.Json;
using System;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Web.Http;
using DevExtreme.MVC.Demos.Models.Northwind;
using DevExtreme.MVC.Demos.Models.DataGrid;
using System.Collections.Generic;
namespace DevExtreme.MVC.Demos.Controllers {
[Route("api/DataGridWebApi/{action}", Name = "DataGridWebApi")]
public class DataGridWebApiController : ApiController {
InMemoryNorthwindContext _nwind = new InMemoryNorthwindContext();
[HttpGet]
public HttpResponseMessage Orders(DataSourceLoadOptions loadOptions) {
return Request.CreateResponse(DataSourceLoader.Load(_nwind.Orders, loadOptions));
}
[HttpPost]
public HttpResponseMessage InsertOrder(FormDataCollection form) {
var values = form.Get("values");
var newOrder = new Order();
JsonConvert.PopulateObject(values, newOrder);
Validate(newOrder);
if(!ModelState.IsValid)
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState.GetFullErrorMessage());
_nwind.Orders.Add(newOrder);
_nwind.SaveChanges();
return Request.CreateResponse(HttpStatusCode.Created, newOrder);
}
[HttpPut]
public HttpResponseMessage UpdateOrder(FormDataCollection form) {
var key = Convert.ToInt32(form.Get("key"));
var values = form.Get("values");
var order = _nwind.Orders.First(o => o.OrderID == key);
JsonConvert.PopulateObject(values, order);
Validate(order);
if(!ModelState.IsValid)
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState.GetFullErrorMessage());
_nwind.SaveChanges();
return Request.CreateResponse(HttpStatusCode.OK, order);
}
[HttpDelete]
public void DeleteOrder(FormDataCollection form) {
var key = Convert.ToInt32(form.Get("key"));
var order = _nwind.Orders.First(o => o.OrderID == key);
_nwind.Orders.Remove(order);
_nwind.SaveChanges();
}
// additional actions
[HttpGet]
public HttpResponseMessage OrderDetails(int orderID, DataSourceLoadOptions loadOptions) {
return Request.CreateResponse(DataSourceLoader.Load(
from i in _nwind.Order_Details
where i.OrderID == orderID
select new {
Product = i.Product.ProductName,
Price = i.UnitPrice,
i.Quantity,
Sum = i.UnitPrice * i.Quantity
},
loadOptions
));
}
[HttpGet]
public HttpResponseMessage ShippersLookup(DataSourceLoadOptions loadOptions) {
var lookup = from i in _nwind.Shippers
orderby i.CompanyName
select new {
Value = i.ShipperID,
Text = i.CompanyName
};
return Request.CreateResponse(DataSourceLoader.Load(lookup, loadOptions));
}
[HttpGet]
public HttpResponseMessage CustomersLookup(DataSourceLoadOptions loadOptions) {
var lookup = from i in _nwind.Customers
let text = i.CompanyName + " (" + i.Country + ")"
orderby i.CompanyName
select new {
Value = i.CustomerID,
Text = text
};
return Request.CreateResponse(DataSourceLoader.Load(lookup, loadOptions));
}
[HttpPost]
public HttpResponseMessage Batch(List<DataChange> changes) {
foreach(var change in changes) {
Order order;
if(change.Type == "update" || change.Type == "remove") {
var key = Convert.ToInt32(change.Key);
order = _nwind.Orders.First(o => o.OrderID == key);
} else {
order = new Order();
}
if(change.Type == "insert" || change.Type == "update") {
JsonConvert.PopulateObject(change.Data.ToString(), order);
Validate(order);
if(!ModelState.IsValid)
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState.GetFullErrorMessage());
if(change.Type == "insert") {
_nwind.Orders.Add(order);
}
change.Data = order;
} else if(change.Type == "remove") {
_nwind.Orders.Remove(order);
}
}
_nwind.SaveChanges();
return Request.CreateResponse(HttpStatusCode.OK, changes);
}
}
}
using System;
using System.Collections.Generic;
using System.Data.Entity;
namespace DevExtreme.MVC.Demos.Models.Northwind {
public class InMemoryNorthwindContext : InMemoryDataContext<Order> {
readonly NorthwindContext _nwind = new NorthwindContext();
public DbSet<Customer> Customers => _nwind.Customers;
public DbSet<Order_Detail> Order_Details => _nwind.Order_Details;
public ICollection<Order> Orders => ItemsInternal;
public DbSet<Shipper> Shippers => _nwind.Shippers;
protected override IEnumerable<Order> Source => _nwind.Orders;
protected override int GetKey(Order item) => item.OrderID;
protected override void SetKey(Order item, int key) => item.OrderID = key;
}
}
A 1-Click Solution for CRUD Web API Services with Role-based Access Control via EF Core
If you target .NET for your backend API, be sure to check out Web API Service and register your free copy today. The Solution Wizard scaffolds an OData v4 Web API Service (.NET 6+) with integrated authorization & CRUD operations powered by EF Core ORM. You can use OAuth2, JWT or custom authentication strategies alongside tools like Postman or Swagger (OpenAPI) for API testing. The built-in Web API Service also filters out secured server data based on permissions granted to users. Advanced/enterprise functions include audit trail, endpoints to download reports, file attachments, check validation, obtain localized captions, etc.
To use the free Solution Wizard (which creates the Web API Service), run the Universal Component Installer from the DevExpress Download Manager and use our predefined template in Visual Studio 2022+.
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