Multiple Record Selection API

DataGrid has the following API for multiple record selection:

selectAll() / deselectAll()
Selects / deselects all rows or current page rows, depending on the value of selectAllMode.
selectRows(keys, preserve) / deselectRows(keys)
Selects / deselects rows with the specified keys.
selectRowsByIndexes(indexes)
Selects rows with specific indexes.
clearSelection()
Clears the selection of all rows on all pages.
getSelectedRowKeys() / getSelectedRowsData()
Gets the selected rows' keys or data objects.

In this demo, selectAll() or selectRows(keys, preserve) is called when you change the SelectBox value and clearSelection() is called when you click the Clear Selection button.

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Backend API

<template> <div> <DxDataGrid id="grid-container" :data-source="employees" ref="dataGridRef" :selected-row-keys="selectedRowKeys" :show-borders="true" key-expr="ID" @selection-changed="onSelectionChanged" > <DxSelection mode="multiple"/> <DxColumn :width="70" data-field="Prefix" caption="Title" /> <DxColumn data-field="FirstName" /> <DxColumn data-field="LastName" /> <DxColumn :width="180" data-field="Position" /> <DxColumn :width="125" data-field="BirthDate" data-type="date" /> <DxColumn :width="125" data-field="HireDate" data-type="date" /> <DxToolbar> <DxItem location="before"> <DxSelectBox :data-source="prefixOptions" :value="selectedPrefix" :input-attr="{ 'aria-label': 'Title' }" placeholder="Select title" width="150px" @value-changed="filterSelection" /> </DxItem> <DxItem location="before"> <DxButton :disabled="!selectedRowKeys.length" text="Clear Selection" @click="clearSelection" /> </DxItem> </DxToolbar> </DxDataGrid> <div class="selected-data"> <span class="caption">Selected Records:</span>{{ ' ' }} <span> {{ selectedEmployeeNames }} </span> </div> </div> </template> <script setup lang="ts"> import { computed, ref } from 'vue'; import { DxColumn, DxDataGrid, DxSelection, DxToolbar, DxItem, } from 'devextreme-vue/data-grid'; import DxButton from 'devextreme-vue/button'; import DxSelectBox from 'devextreme-vue/select-box'; import { employees } from './data.js'; const dataGridRef = ref<DxDataGrid | null>(null); const selectedPrefix = ref<string | null>(null); const prefixOptions = ['All', 'Dr.', 'Mr.', 'Mrs.', 'Ms.']; let selectionChangedBySelectBox = false; const selectedRowsData = ref<any[]>([]); const getEmployeeName = (row) => `${row.FirstName} ${row.LastName}`; const selectedRowKeys = computed(() => selectedRowsData.value.map((employee) => employee.ID)); const selectedEmployeeNames = computed(() => ( selectedRowsData.value.length ? selectedRowsData.value.map(getEmployeeName).join(', ') : 'Nobody has been selected' )); const clearSelection = () => { const dataGrid = dataGridRef.value!.instance!; dataGrid.clearSelection(); }; const filterSelection = (e) => { if (!e.value) { return; } selectedPrefix.value = e.value; selectionChangedBySelectBox = true; selectedRowsData.value = e.value === 'All' ? employees : employees.filter((employee) => employee.Prefix === e.value); }; const onSelectionChanged = (e) => { if (!selectionChangedBySelectBox) { selectedPrefix.value = null; } selectedRowsData.value = e.selectedRowsData; selectionChangedBySelectBox = false; }; </script> <style scoped> #grid { display: flex; align-items: center; margin-bottom: 10px; } .selected-data { margin-top: 20px; padding: 20px; background-color: rgba(191, 191, 191, 0.15); } .selected-data .caption { font-weight: bold; font-size: 115%; margin-right: 4px; } </style>

import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#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/23.1.5/css/dx.light.css" /> <script type="module"> import * as vueCompilerSFC from "https://unpkg.com/@vue/compiler-sfc@3.3.4/dist/compiler-sfc.esm-browser.js"; window.vueCompilerSFC = vueCompilerSFC; </script> <script src="https://unpkg.com/typescript@3.9.10/lib/typescript.js"></script> <script src="https://unpkg.com/core-js@2.6.12/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>

export const employees = [{ ID: 1, FirstName: 'John', LastName: 'Heart', Prefix: 'Mr.', Position: 'CEO', Picture: '../../../../images/employees/01.png', BirthDate: '1964/03/16', HireDate: '1995/01/15', Notes: 'John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003.\r\n\r\nWhen not working hard as the CEO, John loves to golf and bowl. He once bowled a perfect game of 300.', Address: '351 S Hill St.', }, { ID: 20, FirstName: 'Olivia', LastName: 'Peyton', Prefix: 'Mrs.', Position: 'Sales Assistant', Picture: '../../../../images/employees/09.png', BirthDate: '1981/06/03', HireDate: '2012/05/14', Notes: 'Olivia loves to sell. She has been selling DevAV products since 2012. \r\n\r\nOlivia was homecoming queen in high school. She is expecting her first child in 6 months. Good Luck Olivia.', Address: '807 W Paseo Del Mar', }, { ID: 4, FirstName: 'Robert', LastName: 'Reagan', Prefix: 'Mr.', Position: 'CMO', Picture: '../../../../images/employees/03.png', BirthDate: '1974/09/07', HireDate: '2002/11/08', Notes: 'Robert was recently voted the CMO of the year by CMO Magazine. He is a proud member of the DevAV Management Team.\r\n\r\nRobert is a championship BBQ chef, so when you get the chance ask him for his secret recipe.', Address: '4 Westmoreland Pl.', }, { ID: 5, FirstName: 'Greta', LastName: 'Sims', Prefix: 'Ms.', Position: 'HR Manager', Picture: '../../../../images/employees/04.png', BirthDate: '1977/11/22', HireDate: '1998/04/23', Notes: 'Greta has been DevAV\'s HR Manager since 2003. She joined DevAV from Sonee Corp.\r\n\r\nGreta is currently training for the NYC marathon. Her best marathon time is 4 hours. Go Greta.', Address: '1700 S Grandview Dr.', }, { ID: 6, FirstName: 'Brett', LastName: 'Wade', Prefix: 'Mr.', Position: 'IT Manager', Picture: '../../../../images/employees/05.png', BirthDate: '1968/12/01', HireDate: '2009/03/06', Notes: 'Brett came to DevAv from Microsoft and has led our IT department since 2012.\r\n\r\nWhen he is not working hard for DevAV, he coaches Little League (he was a high school pitcher).', Address: '1120 Old Mill Rd.', }, { ID: 7, FirstName: 'Sandra', LastName: 'Johnson', Prefix: 'Mrs.', Position: 'Controller', Picture: '../../../../images/employees/06.png', BirthDate: '1974/11/15', HireDate: '2005/05/11', Notes: 'Sandra is a CPA and has been our controller since 2008. She loves to interact with staff so if you\'ve not met her, be certain to say hi.\r\n\r\nSandra has 2 daughters both of whom are accomplished gymnasts.', Address: '4600 N Virginia Rd.', }, { ID: 10, FirstName: 'Kevin', LastName: 'Carter', Prefix: 'Mr.', Position: 'Shipping Manager', Picture: '../../../../images/employees/07.png', BirthDate: '1978/01/09', HireDate: '2009/08/11', Notes: 'Kevin is our hard-working shipping manager and has been helping that department work like clockwork for 18 months.\r\n\r\nWhen not in the office, he is usually on the basketball court playing pick-up games.', Address: '424 N Main St.', }, { ID: 11, FirstName: 'Cynthia', LastName: 'Stanwick', Prefix: 'Ms.', Position: 'HR Assistant', Picture: '../../../../images/employees/08.png', BirthDate: '1985/06/05', HireDate: '2008/03/24', Notes: 'Cindy joined us in 2008 and has been in the HR department for 2 years. \r\n\r\nShe was recently awarded employee of the month. Way to go Cindy!', Address: '2211 Bonita Dr.', }, { ID: 30, FirstName: 'Kent', LastName: 'Samuelson', Prefix: 'Dr.', Position: 'Ombudsman', Picture: '../../../../images/employees/02.png', BirthDate: '1972/09/11', HireDate: '2009/04/22', Notes: 'As our ombudsman, Kent is on the front-lines solving customer problems and helping our partners address issues out in the field. He is a classically trained musician and is a member of the Chamber Orchestra.', Address: '12100 Mora Dr', }, { ID: 21, FirstName: 'Taylor', LastName: 'Riley', Prefix: 'Mr.', Position: 'Network Admin', Picture: '', BirthDate: '1982/08/14', HireDate: '2012/04/14', Notes: 'If you are like the rest of us at DevAV, then you\'ve probably reached out for help from Taylor. He does a great job as a member of our IT department.', Address: '7776 Torreyson Dr', }];