Custom Summaries
The DataGrid can calculate custom summaries on the client or server side. In this demo, we have implemented client-side logic. The instructions below explain how to do this in your code:
-
Make sure that the remoteOperations.summary, remoteOperations.groupPaging, or remoteOperations property is not set or set to false.
-
Add a summary configuration object to the summary.groupItems or summary.totalItems array.
-
Set the object's summaryType to "custom".
-
Specify the summary's name. It will be used to identify the summary item within the calculateCustomSummary function in the next step.
-
Calculate the resulting value in the calculateCustomSummary function. Implement the necessary calculation stages. See the function's description for details.
The custom summary in this example calculates the sum of sale amounts for selected rows. To recalculate the resulting value when selection is changed, the code calls the refresh() method in the onSelectionChanged handler.
Client-side custom summaries are suitable for small datasets. If your tests show that client-side calculations result in noticeable lags, we recommend that you use Server-Side Data Aggregation.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you!
We appreciate your feedback.
We appreciate your feedback.
import React from 'react';
import DataGrid, { Column, Selection, Paging, Summary, TotalItem } from 'devextreme-react/data-grid';
import service from './data.js';
class App extends React.Component {
constructor(props) {
super(props);
this.orders = service.getOrders();
}
calculateSelectedRow(options) {
if (options.name === 'SelectedRowsSummary') {
if (options.summaryProcess === 'start') {
options.totalValue = 0;
} else if (options.summaryProcess === 'calculate') {
if (options.component.isRowSelected(options.value.ID)) {
options.totalValue = options.totalValue + options.value.SaleAmount;
}
}
}
}
onSelectionChanged(e) {
e.component.refresh(true);
}
render() {
return (
<React.Fragment>
<DataGrid
id="gridContainer"
defaultSelectedRowKeys={[1, 4, 7]}
onSelectionChanged={this.onSelectionChanged}
dataSource={this.orders}
keyExpr="ID"
showBorders={true}>
<Paging enabled={false} />
<Selection mode="multiple" />
<Column dataField="OrderNumber" width={130} caption="Invoice Number" />
<Column dataField="OrderDate" width={160} dataType="date" />
<Column dataField="Employee" />
<Column dataField="CustomerStoreCity" caption="City" />
<Column dataField="CustomerStoreState" caption="State" />
<Column dataField="SaleAmount" alignment="right" format="currency" />
<Summary calculateCustomSummary={this.calculateSelectedRow}>
<TotalItem
name="SelectedRowsSummary"
summaryType="custom"
valueFormat="currency"
displayFormat="Sum: {0}"
showInColumn="SaleAmount" />
</Summary>
</DataGrid>
</React.Fragment>
);
}
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('app')
);
<!DOCTYPE html>
<html>
<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=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.4/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import('./index.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
#gridContainer {
height: 440px;
margin-bottom: 10px;
}
let orders = [{
'ID' : 1,
'OrderNumber' : 35703,
'OrderDate' : '2014-04-10',
'SaleAmount' : 11800,
'Terms' : '15 Days',
'TotalAmount' : 12175,
'CustomerStoreState' : 'California',
'CustomerStoreCity' : 'Los Angeles',
'Employee' : 'Harv Mudd'
}, {
'ID' : 4,
'OrderNumber' : 35711,
'OrderDate' : '2014-01-12',
'SaleAmount' : 16050,
'Terms' : '15 Days',
'TotalAmount' : 16550,
'CustomerStoreState' : 'California',
'CustomerStoreCity' : 'San Jose',
'Employee' : 'Jim Packard'
}, {
'ID' : 5,
'OrderNumber' : 35714,
'OrderDate' : '2014-01-22',
'SaleAmount' : 14750,
'Terms' : '15 Days',
'TotalAmount' : 15250,
'CustomerStoreState' : 'Nevada',
'CustomerStoreCity' : 'Las Vegas',
'Employee' : 'Harv Mudd'
}, {
'ID' : 7,
'OrderNumber' : 35983,
'OrderDate' : '2014-02-07',
'SaleAmount' : 3725,
'Terms' : '15 Days',
'TotalAmount' : 3850,
'CustomerStoreState' : 'Colorado',
'CustomerStoreCity' : 'Denver',
'Employee' : 'Todd Hoffman'
}, {
'ID' : 9,
'OrderNumber' : 36987,
'OrderDate' : '2014-03-11',
'SaleAmount' : 14200,
'Terms' : '15 Days',
'TotalAmount' : 14800,
'CustomerStoreState' : 'Utah',
'CustomerStoreCity' : 'Salt Lake City',
'Employee' : 'Clark Morgan'
}, {
'ID' : 11,
'OrderNumber' : 38466,
'OrderDate' : '2014-03-01',
'SaleAmount' : 7800,
'Terms' : '15 Days',
'TotalAmount' : 8200,
'CustomerStoreState' : 'California',
'CustomerStoreCity' : 'Los Angeles',
'Employee' : 'Harv Mudd'
}, {
'ID' : 15,
'OrderNumber' : 39874,
'OrderDate' : '2014-02-04',
'SaleAmount' : 9050,
'Terms' : '30 Days',
'TotalAmount' : 19100,
'CustomerStoreState' : 'Nevada',
'CustomerStoreCity' : 'Las Vegas',
'Employee' : 'Harv Mudd'
}, {
'ID' : 18,
'OrderNumber' : 42847,
'OrderDate' : '2014-02-15',
'SaleAmount' : 20400,
'Terms' : '30 Days',
'TotalAmount' : 20800,
'CustomerStoreState' : 'Wyoming',
'CustomerStoreCity' : 'Casper',
'Employee' : 'Todd Hoffman'
}, {
'ID' : 19,
'OrderNumber' : 43982,
'OrderDate' : '2014-05-29',
'SaleAmount' : 6050,
'Terms' : '30 Days',
'TotalAmount' : 6250,
'CustomerStoreState' : 'Utah',
'CustomerStoreCity' : 'Salt Lake City',
'Employee' : 'Clark Morgan'
}, {
'ID' : 29,
'OrderNumber' : 56272,
'OrderDate' : '2014-02-06',
'SaleAmount' : 15850,
'Terms' : '30 Days',
'TotalAmount' : 16350,
'CustomerStoreState' : 'Utah',
'CustomerStoreCity' : 'Salt Lake City',
'Employee' : 'Clark Morgan'
}, {
'ID' : 30,
'OrderNumber' : 57429,
'OrderDate' : '2013-12-31',
'SaleAmount' : 11050,
'Terms' : '30 Days',
'TotalAmount' : 11400,
'CustomerStoreState' : 'Arizona',
'CustomerStoreCity' : 'Phoenix',
'Employee' : 'Clark Morgan'
}, {
'ID' : 32,
'OrderNumber' : 58292,
'OrderDate' : '2014-05-13',
'SaleAmount' : 13500,
'Terms' : '15 Days',
'TotalAmount' : 13800,
'CustomerStoreState' : 'California',
'CustomerStoreCity' : 'Los Angeles',
'Employee' : 'Harv Mudd'
}];
export default {
getOrders() {
return orders;
}
};
window.config = {
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.7.2/prop-types.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.27.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@21.1.4/cjs',
'devextreme-react': 'npm:devextreme-react@21.1.4',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.1.4/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.19/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.1.42/dist/dx-gantt.js',
'@devextreme/vdom': 'npm:@devextreme/vdom@1.2.2',
'inferno': 'npm:inferno@7.4.8/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat@7.4.8/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.8/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom@1.0.7/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.8/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.8/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class@7.4.8/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras@7.4.8/dist/inferno-extras.min.js',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'@devextreme/vdom': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
packageConfigPaths: [
"npm:@devextreme/*/package.json",
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
};
System.config(window.config);