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Form

Overview

The Form component builds a data entry UI for an object assigned to the formData property. The component displays and aligns label-editor pairs for each field in the bound object.

You can use the editors on the right to modify the following properties:

  • labelLocation
    Specifies whether to display labels above or to the left of corresponding editors.

  • colCount
    Specifies the number of columns in the layout. To build an adaptive layout where the column count depends on the container width, set this property's value to "auto".

  • minColWidth
    Specifies the minimum column width. Use this property when the colCount property's value is "auto".

  • width
    Specifies the Form component's width.

  • readOnly
    Makes the Form editors read-only.

  • showColonAfterLabel
    Specifies whether the Form displays a colon after a label.

To get started with the DevExtreme Form component, refer to the following tutorial for step-by-step instructions: Getting Started with Form.

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window.onload = function () { const showColon = ko.observable(true); const formData = ko.observable(companies[0]); const readOnly = ko.observable(false); const labelLocation = ko.observable('top'); const minColWidth = ko.observable(300); const colCount = ko.observable(2); const widthValue = ko.observable(undefined); const viewModel = { formOptions: { formData, readOnly, showColonAfterLabel: showColon, labelLocation, minColWidth, colCount, width: widthValue, }, selectCompanyOptions: { displayExpr: 'Name', dataSource: companies, value: formData, }, readOnlyOptions: { value: readOnly, text: 'readOnly', }, showColonOptions: { value: showColon, text: 'showColonAfterLabel', }, labelLocationOptions: { items: ['left', 'top'], value: labelLocation, }, minColWidthOptions: { items: [150, 200, 300], value: minColWidth, }, colCountOptions: { items: ['auto', 1, 2, 3], value: colCount, }, widthOptions: { max: 550, value: widthValue, }, }; ko.applyBindings(viewModel, document.getElementById('form-demo')); };
<!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/21.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/21.2.3/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="form-demo"> <div class="widget-container"> <div>Select company:</div> <div data-bind="dxSelectBox: selectCompanyOptions"></div> <div id="form" data-bind="dxForm: formOptions"></div> </div> <div class="options"> <div class="caption">Options</div> <div class="option"> <span>Label location:</span> <div data-bind="dxSelectBox: labelLocationOptions"></div> </div> <div class="option"> <span>Columns count:</span> <div data-bind="dxSelectBox: colCountOptions"></div> </div> <div class="option"> <span>Min column width:</span> <div data-bind="dxSelectBox: minColWidthOptions"></div> </div> <div class="option"> <span>Form width:</span> <div data-bind="dxNumberBox: widthOptions"></div> </div> <div class="option"> <div data-bind="dxCheckBox: readOnlyOptions"></div> </div> <div class="option"> <div data-bind="dxCheckBox: showColonOptions"></div> </div> </div> </div> </div> </body> </html>
.widget-container { margin-right: 320px; padding: 20px; max-width: 550px; min-width: 300px; } #form { margin-top: 25px; } .options { padding: 20px; position: absolute; bottom: 0; right: 0; width: 260px; top: 0; background-color: rgba(191, 191, 191, 0.15); } .caption { font-size: 18px; font-weight: 500; } .option { margin-top: 10px; }
const companies = [{ ID: 1, Name: 'Super Mart of the West', Address: '702 SW 8th Street', City: 'Bentonville', State: 'Arkansas', ZipCode: 72716, Phone: '(800) 555-2797', Fax: '(800) 555-2171', Website: 'http://www.nowebsitesupermart.com', }, { ID: 2, Name: 'Electronics Depot', Address: '2455 Paces Ferry Road NW', City: 'Atlanta', State: 'Georgia', ZipCode: 30339, Phone: '(800) 595-3232', Fax: '(800) 595-3231', Website: 'http://www.nowebsitedepot.com', }, { ID: 3, Name: 'K&S Music', Address: '1000 Nicllet Mall', City: 'Minneapolis', State: 'Minnesota', ZipCode: 55403, Phone: '(612) 304-6073', Fax: '(612) 304-6074', Website: 'http://www.nowebsitemusic.com', }, { ID: 4, Name: "Tom's Club", Address: '999 Lake Drive', City: 'Issaquah', State: 'Washington', ZipCode: 98027, Phone: '(800) 955-2292', Fax: '(800) 955-2293', Website: 'http://www.nowebsitetomsclub.com', }];