Data Grid - Remote CRUD Operations

This demo shows how to implement remote CRUD operations in the CustomStore. You can view the server implementation under the DataGridWebApiController tab in the ASP.NET MVC version of this demo. The requests sent to the server are displayed under the DataGrid.

After a cell is edited, the DataGrid can behave differently depending on the selected refresh mode: reload data from the server (the refreshMode is full), reapply data processing operations (reshape), or merely rerender the changed cells (repaint).

Backend API

@(Html.DevExtreme().DataGrid<DevExtreme.MVC.Demos.Models.Northwind.Order>() .ID("grid") .DataSource(d => d.WebApi() .RouteName("DataGridWebApi") .LoadAction("Orders") .InsertAction("InsertOrder") .UpdateAction("UpdateOrder") .DeleteAction("DeleteOrder") .Key("OrderID") .OnBeforeSend("beforeSend") ) .ShowBorders(true) .RepaintChangesOnly(true) .Scrolling(s => s.Mode(GridScrollingMode.Virtual)) .Editing(e => e .Mode(GridEditMode.Cell) .RefreshMode(GridEditRefreshMode.Reshape) .AllowAdding(true) .AllowDeleting(true) .AllowUpdating(true) ) .Columns(columns => { columns.AddFor(m => m.CustomerID) .Lookup(lookup => lookup .DataSource(d => d.WebApi() .RouteName("DataGridWebApi") .LoadAction("CustomersLookup") .LoadMode(DataSourceLoadMode.Raw) .Key("Value") .OnBeforeSend("beforeSend") ) .DataSourceOptions(o => o.Paginate(true)) .ValueExpr("Value") .DisplayExpr("Text") ); columns.AddFor(m => m.OrderDate); columns.AddFor(m => m.Freight); columns.AddFor(m => m.ShipCountry); columns.AddFor(m => m.ShipVia) .Lookup(lookup => lookup .DataSource(d => d.WebApi() .RouteName("DataGridWebApi") .LoadAction("ShippersLookup") .LoadMode(DataSourceLoadMode.Raw) .Key("Value") .OnBeforeSend("beforeSend") ) .ValueExpr("Value") .DisplayExpr("Text") ); }) .Summary(s => s .TotalItems(totalItems => { totalItems.AddFor(t => t.CustomerID).SummaryType(SummaryType.Count); totalItems.AddFor(t => t.Freight).ValueFormat("#0.00").SummaryType(SummaryType.Sum); }) ) ) <div class="options"> <div class="caption">Options</div> <div class="option"> <span>Refresh Mode:</span> @(Html.DevExtreme().SelectBox() .ID("refresh-mode") .InputAttr("aria-label", "Refresh Mode") .DataSource(new[] { "full", "reshape", "repaint" }) .Value("reshape") .OnValueChanged(@<text> function(e) { $("#grid").dxDataGrid("instance").option("editing.refreshMode", e.value); } </text>) ) </div> <div id="requests"> <div> <div class="caption">Network Requests</div> @(Html.DevExtreme().Button() .ID("clear") .Text("Clear") .OnClick(@<text> function() { $("#requests ul").empty(); } </text>) ) </div> <ul></ul> </div> </div> <script> function beforeSend(operation, ajaxSettings) { var data = ajaxSettings.data || {}, args = Object.keys(data).map(function (key) { return key + "=" + data[key]; }).join(" "); var logList = $("#requests ul"), time = DevExpress.localization.formatDate(new Date(), "HH:mm:ss"), newItem = $("<li>").text([time, ajaxSettings.method, ajaxSettings.url, args].join(" ")); logList.prepend(newItem); } </script>

using DevExtreme.MVC.Demos.Models; using DevExtreme.MVC.Demos.Models.DataGrid; using DevExtreme.MVC.Demos.Models.SampleData; using System; using System.Linq; using System.Web.Mvc; namespace DevExtreme.MVC.Demos.Controllers { public class DataGridController : Controller { public ActionResult RemoteCRUDOperations() { return View(); } } }

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; } }

#grid { height: 440px; } .options { padding: 20px; margin-top: 20px; background-color: rgba(191, 191, 191, 0.15); } .caption { margin-bottom: 10px; font-weight: 500; font-size: 18px; } .option { margin-bottom: 10px; } .option > span { position: relative; top: 2px; margin-right: 10px; } .option > .dx-widget { display: inline-block; vertical-align: middle; } #requests .caption { float: left; padding-top: 7px; } #requests > div { padding-bottom: 5px; } #requests > div:after { content: ""; display: table; clear: both; } #requests #clear { float: right; } #requests ul { list-style: none; max-height: 100px; overflow: auto; margin: 0; } #requests ul li { padding: 7px 0; border-bottom: 1px solid #dddddd; } #requests ul li:last-child { border-bottom: none; }