Custom Summaries
Documentation
The DataGrid support custom summary calculation. In this example, summaries are only calculated against selected grid rows. This behavior is implemented using the calculateCustomSummary and onSelectionChanged options.
Feel free to share demo-related thoughts here.
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If you have technical questions, please create a support ticket in the DevExpress Support Center.
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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/20.1.8/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.8/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;
}
};
System.config({
transpiler: 'plugin-babel',
meta: {
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16/umd/react.development.js',
'react-dom': 'npm:react-dom@16/umd/react-dom.development.js',
'prop-types': 'npm:prop-types/prop-types.js',
'devextreme': 'npm:devextreme@20.1',
'devextreme-react': 'npm:devextreme-react@20.1',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.7/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram@1.0.17',
'devexpress-gantt': 'npm:devexpress-gantt@1.0.10',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});