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    Data Grid

    Multiple Record Selection API

    DataGrid has the following API for multiple record selection:

    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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    window.onload = function () { const selectedItemsText = ko.observable('Nobody has been selected'); const selectedPrefix = ko.observable(null); const clearButtonDisabled = ko.observable(true); const viewModel = { selectedItemsText, gridOptions: { dataSource: employees, keyExpr: 'ID', showBorders: true, selection: { mode: 'multiple', }, columns: [{ dataField: 'Prefix', caption: 'Title', width: 70, }, 'FirstName', 'LastName', { dataField: 'Position', width: 180, }, { dataField: 'BirthDate', dataType: 'date', width: 125, }, { dataField: 'HireDate', dataType: 'date', width: 125, }, ], onSelectionChanged(selectedItems) { const data = selectedItems.selectedRowsData; if (data.length > 0) { selectedItemsText($.map(data, (value) => `${value.FirstName} ${value.LastName}`).join(', ')); } else { selectedItemsText('Nobody has been selected'); } selectedPrefix(null); clearButtonDisabled(!data.length); }, }, selectPrefixOptions: { dataSource: ['All', 'Dr.', 'Mr.', 'Mrs.', 'Ms.'], placeholder: 'Select title', value: selectedPrefix, onValueChanged(data) { const dataGrid = $('#grid-container').dxDataGrid('instance'); if (!data.value) { return; } if (data.value === 'All') { dataGrid.selectAll(); } else { const employeesToSelect = $.map($.grep(dataGrid.option('dataSource'), (item) => item.Prefix === data.value), (item) => item.ID); dataGrid.selectRows(employeesToSelect); } selectedPrefix(data.value); }, }, clearButtonOptions: { text: 'Clear Selection', disabled: clearButtonDisabled, onClick() { $('#grid-container').dxDataGrid('instance').clearSelection(); }, }, }; ko.applyBindings(viewModel, document.getElementById('grid')); };
    <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.2.3/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/22.2.3/js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="grid"> <div id="select-prefix" data-bind="dxSelectBox: selectPrefixOptions"></div> <div id="gridClearSelection" data-bind="dxButton: clearButtonOptions"></div> </div> <div id="grid-container" data-bind="dxDataGrid: gridOptions"></div> <div class="selected-data"> <span class="caption">Selected Records:</span> <span id="selectedItemsContainer" data-bind="text: selectedItemsText"></span> </div> </div> </body> </html>
    #grid { display: flex; align-items: center; margin-bottom: 10px; } #select-prefix { width: 150px; margin-right: 8px; } .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; }
    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', }];