Demos
Grid(Vue)
Data-binding
OData API
Server-based Group
Virtual OData

OData and Virtual Data with server-based Grouping (Vue)

The ODataCollectionView class provides a simple way to connect controls to OData sources. When you create an ODataCollectionView, it starts loading the data in the source. The ODataVirtualCollectionView extends ODataCollectionView to provide on-demand loading of data.

ODataVirtualCollectionView class supports server-based grouping along with data-virtualization by setting the groupOnServer to true along with groupDescriptions.

Learn about FlexGrid | Binding FlexGrid to Virtual OData Documentation | FlexGrid API Reference

This example uses Vue.

JavaScript
Angular
Vue
React
app.vue
index.html
Copy to CodeMine
<template>
    <div class="container-fluid">
        <div>
            <h4>ODataVirtualCollectionView with server-based grouping</h4>
            <wj-flex-grid :itemsSource="virtualOrderDetails" :isReadOnly="true"  :initialized="flexInitialized">
                <wj-flex-grid-filter :defaultFilterType="'Condition'" />
                <wj-flex-grid-column :binding="'AccountNumber'" :header="'Account Number'" :dataType="'String'"
                    :visible="false" />
                <wj-flex-grid-column :binding="'PurchaseOrderNumber'" :header="'Purchase Order Number'"
                    :dataType="'String'" :width="'*'" :minWidth="200" />
                <wj-flex-grid-column :binding="'SalesOrderNumber'" :header="'Sales Order Number'" :dataType="'String'"
                    :width="'*'" :minWidth="200" />
                <wj-flex-grid-column :binding="'SubTotal'" :header="'Sub Total'" :dataType="'Number'" />
                <wj-flex-grid-column :binding="'TaxAmt'" :header="'Tax Amount'" :dataType="'Number'" />
                <wj-flex-grid-column :binding="'Freight'" :header="'Freight'" :dataType="'Number'" />
                <wj-flex-grid-column :binding="'TotalDue'" :header="'Total Due'" :dataType="'Number'" />
                <wj-flex-grid-column :binding="'ModifiedDate'" :header="'Modified Date'" :dataType="'Date'"
                    :format="'d'" />
            </wj-flex-grid>
        </div>
    </div>
</template>

<script setup>
import * as wjcOData from "@mescius/wijmo.odata";
import { ref } from "vue";

const url = "https://demodata.mescius.io/adventureworks/odata/v1/";
const tableName = "SalesOrderHeaders";
const fields = "AccountNumber,PurchaseOrderNumber,SalesOrderNumber,SubTotal,TaxAmt,Freight,TotalDue,ModifiedDate".split(',');
const flexGrid = ref(null);

const virtualOrderDetails = ref(
    new wjcOData.ODataVirtualCollectionView(url, tableName, {
        fields: fields,
        groupOnServer: true,
        groupDescriptions: ["AccountNumber"],
        loading: () => toggleSpinner(flexGrid.value, true),
        loaded: () => toggleSpinner(flexGrid.value, false)
    }),
);
function flexInitialized(grid) {
    flexGrid.value = grid;
}
//show gif loader while data loading
function toggleSpinner(grid, show) {
    let _rect = grid.controlRect;
    let elem = grid.hostElement.querySelector(".spinner");
    if (!elem) elem = wijmo.createElement(`<div class='spinner' style="left:${_rect.left}px;top:${_rect.top}px;width:${_rect.width}px;height:${_rect.height}px;"><img src="resources/Rounded%20blocks.gif"></div>`, grid.hostElement);
    elem.style.display = show ? "block" : "none";
}
</script>

<style>
.wj-flexgrid {
    height: 350px;
}

body {
    margin-bottom: 24pt;
}

.spinner{
    position: absolute;
    z-index: 10;
    opacity: .5;
}
.spinner img {
    margin: auto;
    position: relative;
    top:40%;
    left:45%;
}
</style>
<template> <div class="container-fluid"> <div> <h4>ODataVirtualCollectionView with server-based grouping</h4> <wj-flex-grid :itemsSource="virtualOrderDetails" :isReadOnly="true" :initialized="flexInitialized"> <wj-flex-grid-filter :defaultFilterType="'Condition'" /> <wj-flex-grid-column :binding="'AccountNumber'" :header="'Account Number'" :dataType="'String'" :visible="false" /> <wj-flex-grid-column :binding="'PurchaseOrderNumber'" :header="'Purchase Order Number'" :dataType="'String'" :width="'*'" :minWidth="200" /> <wj-flex-grid-column :binding="'SalesOrderNumber'" :header="'Sales Order Number'" :dataType="'String'" :width="'*'" :minWidth="200" /> <wj-flex-grid-column :binding="'SubTotal'" :header="'Sub Total'" :dataType="'Number'" /> <wj-flex-grid-column :binding="'TaxAmt'" :header="'Tax Amount'" :dataType="'Number'" /> <wj-flex-grid-column :binding="'Freight'" :header="'Freight'" :dataType="'Number'" /> <wj-flex-grid-column :binding="'TotalDue'" :header="'Total Due'" :dataType="'Number'" /> <wj-flex-grid-column :binding="'ModifiedDate'" :header="'Modified Date'" :dataType="'Date'" :format="'d'" /> </wj-flex-grid> </div> </div> </template> <script setup> import * as wjcOData from "@mescius/wijmo.odata"; import { ref } from "vue"; const url = "https://demodata.mescius.io/adventureworks/odata/v1/"; const tableName = "SalesOrderHeaders"; const fields = "AccountNumber,PurchaseOrderNumber,SalesOrderNumber,SubTotal,TaxAmt,Freight,TotalDue,ModifiedDate".split(','); const flexGrid = ref(null); const virtualOrderDetails = ref( new wjcOData.ODataVirtualCollectionView(url, tableName, { fields: fields, groupOnServer: true, groupDescriptions: ["AccountNumber"], loading: () => toggleSpinner(flexGrid.value, true), loaded: () => toggleSpinner(flexGrid.value, false) }), ); function flexInitialized(grid) { flexGrid.value = grid; } //show gif loader while data loading function toggleSpinner(grid, show) { let _rect = grid.controlRect; let elem = grid.hostElement.querySelector(".spinner"); if (!elem) elem = wijmo.createElement(`<div class='spinner' style="left:${_rect.left}px;top:${_rect.top}px;width:${_rect.width}px;height:${_rect.height}px;"><img src="resources/Rounded%20blocks.gif"></div>`, grid.hostElement); elem.style.display = show ? "block" : "none"; } </script> <style> .wj-flexgrid { height: 350px; } body { margin-bottom: 24pt; } .spinner{ position: absolute; z-index: 10; opacity: .5; } .spinner img { margin: auto; position: relative; top:40%; left:45%; } </style>
<!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="compiler.js" type="module"></script> <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.js'); </script> </head> <body> <div id="app"> </div> </body> </html>
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true }, meta: { '*.css': { loader: 'css' }, '*.vue': { loader: '../plugin-vue/index.js' } //'*.vue': { loader: 'systemjs-plugin-vue' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 'npm:@mescius/wijmo.chart.map/index.js', '@mescius/wijmo.gauge': 'npm:@mescius/wijmo.gauge/index.js', '@mescius/wijmo.grid': 'npm:@mescius/wijmo.grid/index.js', '@mescius/wijmo.grid.detail': 'npm:@mescius/wijmo.grid.detail/index.js', '@mescius/wijmo.grid.filter': 'npm:@mescius/wijmo.grid.filter/index.js', '@mescius/wijmo.grid.search': 'npm:@mescius/wijmo.grid.search/index.js', '@mescius/wijmo.grid.style': 'npm:@mescius/wijmo.grid.style/index.js', '@mescius/wijmo.grid.grouppanel': 'npm:@mescius/wijmo.grid.grouppanel/index.js', '@mescius/wijmo.grid.multirow': 'npm:@mescius/wijmo.grid.multirow/index.js', '@mescius/wijmo.grid.transposed': 'npm:@mescius/wijmo.grid.transposed/index.js', '@mescius/wijmo.grid.transposedmultirow': 'npm:@mescius/wijmo.grid.transposedmultirow/index.js', '@mescius/wijmo.grid.pdf': 'npm:@mescius/wijmo.grid.pdf/index.js', '@mescius/wijmo.grid.sheet': 'npm:@mescius/wijmo.grid.sheet/index.js', '@mescius/wijmo.grid.xlsx': 'npm:@mescius/wijmo.grid.xlsx/index.js', '@mescius/wijmo.grid.selector': 'npm:@mescius/wijmo.grid.selector/index.js', '@mescius/wijmo.grid.cellmaker': 'npm:@mescius/wijmo.grid.cellmaker/index.js', '@mescius/wijmo.nav': 'npm:@mescius/wijmo.nav/index.js', '@mescius/wijmo.odata': 'npm:@mescius/wijmo.odata/index.js', '@mescius/wijmo.olap': 'npm:@mescius/wijmo.olap/index.js', '@mescius/wijmo.rest': 'npm:@mescius/wijmo.rest/index.js', '@mescius/wijmo.pdf': 'npm:@mescius/wijmo.pdf/index.js', '@mescius/wijmo.pdf.security': 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'@vue/runtime-dom':'npm:@vue/runtime-dom/dist/runtime-dom.global.prod.js', '@vue/shared':'npm:@vue/shared/dist/shared.cjs.js', 'vue-loader': 'npm:systemjs-vue-browser/index.js', //'systemjs-plugin-vue': 'npm:systemjs-plugin-vue/index.js', 'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel/systemjs-babel-browser.js' }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'js' }, rxjs: { defaultExtension: 'js' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);