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Lookup

Event Handling

Documentation
This demo illustrates how to perform a custom action when the lookup value is changed. Use the onValueChanged event handler to process the new lookup value.
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window.onload = function() { var viewModel = { selectedEmployee: ko.observable(), lookupOptions: { items: employees, displayExpr: "FullName", placeholder: "Select employee", showPopupTitle: false, onValueChanged: function(e) { e.model.selectedEmployee(e.value); } } }; ko.applyBindings(viewModel, document.getElementById("demo")); };
<!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" /> <script src="js/jquery-3.1.0.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.0/knockout-min.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/16.2.6/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/16.2.6/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/16.2.6/css/dx.light.css" /> <link rel="dx-theme" data-theme="android5.light" href="https://cdn3.devexpress.com/jslib/16.2.6/css/dx.android5.light.css" /> <link rel="dx-theme" data-theme="ios7.default" href="https://cdn3.devexpress.com/jslib/16.2.6/css/dx.ios7.default.css" /> <link rel="dx-theme" data-theme="win10.black" href="https://cdn3.devexpress.com/jslib/16.2.6/css/dx.win10.black.css" /> <link rel="dx-theme" data-theme="win10.white" href="https://cdn3.devexpress.com/jslib/16.2.6/css/dx.win10.white.css" /> <script src="https://cdn3.devexpress.com/jslib/16.2.6/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="demo"> <div class="dx-fieldset"> <div class="dx-field"> <div data-bind="dxLookup: lookupOptions"></div> </div> </div> <div data-bind="if: selectedEmployee()"> <img data-bind="attr: { src: selectedEmployee().Picture }" alt=""> <span data-bind="text: selectedEmployee().Notes"></span> </div> </div> </div> </body> </html>
.dx-theme-generic img { max-width: 200px; float: left; } img { max-width: 100%; }
var employees = [{ "ID": 1, "FirstName": "John", "LastName": "Heart", "Prefix": "Mr.", "FullName": "John Heart", "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": 2, "FirstName": "Olivia", "LastName": "Peyton", "Prefix": "Mrs.", "FullName": "Olivia Peyton", "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": 3, "FirstName": "Robert", "LastName": "Reagan", "Prefix": "Mr.", "FullName": "Robert Reagan", "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": 4, "FirstName": "Greta", "LastName": "Sims", "Prefix": "Ms.", "FullName": "Greta Sims", "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": 5, "FirstName": "Brett", "LastName": "Wade", "Prefix": "Mr.", "FullName": "Brett Wade", "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": 6, "FirstName": "Sandra", "LastName": "Johnson", "Prefix": "Mrs.", "FullName": "Sandra Johnson", "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": 7, "FirstName": "Kevin", "LastName": "Carter", "Prefix": "Mr.", "FullName": "Kevin Carter", "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": 8, "FirstName": "Cynthia", "LastName": "Stanwick", "Prefix": "Ms.", "FullName": "Cindy Stanwick", "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": 9, "FirstName": "Kent", "LastName": "Samuelson", "Prefix": "Dr.", "FullName": "Ken Samuelson", "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" }];