OData 및 가상 데이터

ODataCollectionView 클래스는 컨트롤을 OData 소스에 연결하는 간단한 방법을 제공합니다. ODataCollectionView를 만들면 소스의 데이터를 로드하기 시작합니다. ODataVirtualCollectionViewODataCollectionView를 확장하여 요청 시 데이터 로드 기능을 제공합니다. 서버의 데이터를 자동으로 로드하지 않습니다. 대신, setWindow 메서드를 사용하여 요청 시 데이터 조각(창)을 로드합니다. 아래 그리드는 두 클래스의 작동 방식을 모두 보여 줍니다. 왼쪽 그리드에서 데이터가 어떻게 점진적으로 로드되는지를 확인합니다. 오른쪽 그리드에는 전체 레코드 수가 즉시 표시되지만, 아래로 스크롤할 때까지 데이터가 로드되지 않습니다.

app.js
index.html
styles.css
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import { format } from '@mescius/wijmo'; import { ODataCollectionView, ODataVirtualCollectionView } from '@mescius/wijmo.odata'; import { FlexGrid, CellType } from '@mescius/wijmo.grid'; document.readyState === 'complete' ? init() : window.onload = init; function init() { // get order details into an ODataCollectionView var url = 'https://services.odata.org/Northwind/Northwind.svc'; var table = 'Order_Details_Extendeds'; var orderDetails = new ODataCollectionView(url, table); // show the data on a grid var itemCountElement = document.getElementById('itemCount'); var theGrid = new FlexGrid('#theGrid', { itemsSource: orderDetails, isReadOnly: true, formatItem: function (s, e) { if (e.panel.cellType == CellType.RowHeader) { e.cell.textContent = e.row + 1; } }, loadedRows: function (sender, e) { var el = document.getElementById('itemCount'); el.innerHTML = format('{length:n0} items', sender.rows); } }); // get order details into a ODataVirtualCollectionView var virtualDetails = new ODataVirtualCollectionView(url, table, { loaded: function (sender, e) { var el = document.getElementById('totalItemCount'); el.innerHTML = format('{totalItemCount:n0} items', sender); } }); // show the data on a grid var theVirtualGrid = new FlexGrid('#theVirtualGrid', { itemsSource: virtualDetails, isReadOnly: true, formatItem: function (s, e) { if (e.panel.cellType == CellType.RowHeader) { e.cell.textContent = e.row + 1; } } }); }
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import { format } from '@mescius/wijmo'; import { ODataCollectionView, ODataVirtualCollectionView } from '@mescius/wijmo.odata'; import { FlexGrid, CellType } from '@mescius/wijmo.grid'; document.readyState === 'complete' ? init() : window.onload = init; function init() { // get order details into an ODataCollectionView var url = 'https://services.odata.org/Northwind/Northwind.svc'; var table = 'Order_Details_Extendeds'; var orderDetails = new ODataCollectionView(url, table); // show the data on a grid var itemCountElement = document.getElementById('itemCount'); var theGrid = new FlexGrid('#theGrid', { itemsSource: orderDetails, isReadOnly: true, formatItem: function (s, e) { if (e.panel.cellType == CellType.RowHeader) { e.cell.textContent = e.row + 1; } }, loadedRows: function (sender, e) { var el = document.getElementById('itemCount'); el.innerHTML = format('{length:n0} items', sender.rows); } }); // get order details into a ODataVirtualCollectionView var virtualDetails = new ODataVirtualCollectionView(url, table, { loaded: function (sender, e) { var el = document.getElementById('totalItemCount'); el.innerHTML = format('{totalItemCount:n0} items', sender); } }); // show the data on a grid var theVirtualGrid = new FlexGrid('#theVirtualGrid', { itemsSource: virtualDetails, isReadOnly: true, formatItem: function (s, e) { if (e.panel.cellType == CellType.RowHeader) { e.cell.textContent = e.row + 1; } } }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid OData and Virtual OData Binding</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <div class="row"> <div class="col-sm-6"> <h4>ODataCollectionView</h4> <p id="itemCount"></p> <div id="theGrid"></div> </div> <div class="col-sm-6"> <h4>ODataVirtualCollectionView</h4> <p id="totalItemCount"></p> <div id="theVirtualGrid"></div> </div> </div> </div> </body> </html>
.wj-flexgrid { height: 300px; } .wj-flexgrid .wj-rowheaders .wj-cell { font-size: 80%; padding-top: .5em; } body { margin-bottom: 20pt; }
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