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',
}];