Create a Simple Item
By default, the Form generates a simple item for each field of the formData object. In case you need to create items for specific fields only, add the names of these fields to the items array.
jQuery
$(function() { $("#formContainer").dxForm({ formData: { firstName: "John", lastName: "Heart", position: "CEO", officeNo: 901 }, items: ["firstName", "lastName", "position"] }); });
Angular
<dx-form [(formData)]="employee" [items]="['firstName', 'lastName', 'position']"> </dx-form>
import { DxFormModule } from "devextreme-angular"; // ... export class AppComponent { employee = { firstName: "John", lastName: "Heart", position: "CEO", officeNo: 901 } } @NgModule({ imports: [ // ... DxFormModule ], // ... })
Vue
<template> <DxForm :form-data="employee" :items="['firstName', 'lastName', 'position']"> </DxForm> </template> <script> import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import DxForm from 'devextreme-vue/form'; export default { components: { DxForm }, data() { return { employee: { firstName: "John", lastName: "Heart", position: "CEO", officeNo: 901 } } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import Form from 'devextreme-react/form'; class App extends React.Component { employee = { firstName: "John", lastName: "Heart", position: "CEO", officeNo: 901 } render() { return ( <Form formData={this.employee} items={['firstName', 'lastName', 'position']}> </Form> ); } } export default App;
A simple form item is a label-editor pair. The label is the field name that undergoes a slight conversion, for example, the field name "firstName" becomes the "First Name" label. For more information on configuring labels, visit the Configure Item Labels section.
The editor that will be used in a particular simple item depends on the type of data that its field contains. However, you can force an item to use an editor of your choice. For this purpose, specify the item's editorType property. To configure the editor, use the editorOptions object. Note that you also need to specify the dataField property to bind the item to a formData field.
jQuery
$(function() { $("#formContainer").dxForm({ formData: { name: "John Heart", hireDate: new Date(2012, 4, 13), notes: "John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003." }, items: [ "name", { dataField: "hireDate", editorType: "dxCalendar", editorOptions: { value: new Date() } }, { dataField: "notes", editorType: "dxTextArea", editorOptions: { placeholder: "Add notes..." } }] }); });
Angular
<dx-form [(formData)]="employee"> <dxi-item dataField="name"></dxi-item> <dxi-item dataField="hireDate" editorType="dxCalendar" [editorOptions]="{ value: new Date() }"> </dxi-item> <dxi-item dataField="notes" editorType="dxTextArea" [editorOptions]="{ placeholder: 'Add notes...' }"> </dxi-item> </dx-form>
import { DxFormModule, DxCalendarModule, DxTextAreaModule } from "devextreme-angular"; // ... export class AppComponent { employee = { name: "John Heart", hireDate: new Date(2012, 4, 13), notes: "John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003." } } @NgModule({ imports: [ // ... DxFormModule, DxCalendarModule, DxTextAreaModule ], // ... })
Vue
<template> <DxForm :form-data="employee"> <DxSimpleItem data-field="name" /> <DxSimpleItem data-field="hireDate" editor-type="dxCalendar" :editor-options="calendarOptions" /> <DxSimpleItem data-field="notes" editor-type="dxTextArea" :editor-options="textAreaOptions" /> </DxForm> </template> <script> import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import DxForm, { DxSimpleItem } from 'devextreme-vue/form'; import DxCalendar from 'devextreme-vue/calendar'; import DxTextArea from 'devextreme-vue/text-area'; export default { components: { DxForm, DxSimpleItem, DxCalendar, DxTextArea }, data() { return { employee: { name: "John Heart", hireDate: new Date(2012, 4, 13), notes: "John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003." }, calendarOptions: { value: new Date() }, textAreaOptions: { placeholder: 'Add notes...' } } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import Form, { SimpleItem } from 'devextreme-react/form'; import Calendar from 'devextreme-vue/calendar'; import TextArea from 'devextreme-vue/text-area'; const calendarOptions = { value: new Date() }; const textAreaOptions = { placeholder: 'Add notes...' }; class App extends React.Component { employee = { name: "John Heart", hireDate: new Date(2012, 4, 13), notes: "John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003." } render() { return ( <Form formData={this.employee}> <SimpleItem dataField="name" /> <SimpleItem dataField="hireDate" editorType="dxCalendar" editorOptions={calendarOptions} /> <SimpleItem dataField="notes" editorType="dxTextArea" editorOptions={textAreaOptions} /> </Form> ); } } export default App;
Customize a Simple Item
If none of the available editors suit your requirements, you can define a custom one or even place anything you find useful instead. For this purpose, implement a custom template and pass it to the template property.
jQuery
$(function() { $("#formContainer").dxForm({ formData: { name: "John Heart", picture: "https://js.devexpress.com/Content/images/doc/20_1/PhoneJS/person2.png", notes: "John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003." }, items: ["name", { dataField: "notes", template: function (data, itemElement) { itemElement.append("<div id='textAreaContainer'>") .dxTextArea({ value: data.component.option('formData')[data.dataField], onValueChanged: function(e) { data.component.updateData(data.dataField, e.value); } }); } }, { dataField: "picture", template: function (data, itemElement) { itemElement.append("<img src='" + data.editorOptions.value + "'>"); } }] }); });
Angular
<dx-form [(formData)]="employee"> <dxi-item dataField="name"></dxi-item> <dxi-item dataField="notes" [template]="'notesTemplate'"> </dxi-item> <dxi-item dataField="picture" [template]="'pictureTemplate'"> </dxi-item> <div *dxTemplate="let data of 'notesTemplate'"> <dx-text-area [(value)]="employee.notes"></dx-text-area> </div> <div *dxTemplate="let data of 'pictureTemplate'"> <img src="{{data.editorOptions.value}}"> </div> </dx-form>
import { DxFormModule, DxTextAreaModule } from "devextreme-angular"; // ... export class AppComponent { employee = { name: "John Heart", picture: "https://js.devexpress.com/Content/images/doc/20_1/PhoneJS/person2.png", notes: "John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003." } } @NgModule({ imports: [ // ... DxFormModule, DxTextAreaModule ], // ... })
Vue
<template> <DxForm :form-data="employee"> <DxSimpleItem data-field="name" /> <DxSimpleItem data-field="notes" template="notes" /> <DxSimpleItem data-field="picture" template="picture" /> <template #notes> <DxTextArea :value.sync="employee.notes" /> </template> <template #picture="{ data }"> <img :src="data.editorOptions.value"> </template> </DxForm> </template> <script> import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import DxForm, { DxSimpleItem } from 'devextreme-vue/form'; import DxTextArea from 'devextreme-vue/text-area'; export default { components: { DxForm, DxSimpleItem, DxTextArea }, data() { return { employee: { name: "John Heart", picture: "https://js.devexpress.com/Content/images/doc/20_1/PhoneJS/person2.png", notes: "John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003." } } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import Form, { SimpleItem } from 'devextreme-react/form'; import TextArea from 'devextreme-react/text-area'; const renderPicture = (data) => <img src={data.editorOptions.value} /> class App extends React.Component { constructor(props) { super(props); this.state = { employee: { name: "John Heart", picture: "https://js.devexpress.com/Content/images/doc/20_1/PhoneJS/person2.png", notes: "John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003." } }; } setNotes = (e) => { this.setState(prevState => ({ employee: { ...prevState.employee, notes: e.value } })) } renderNotes = (data) => { return ( <TextArea value={this.state.employee.notes} onValueChanged={this.setNotes} /> ); } render() { return ( <Form formData={this.state.employee}> <SimpleItem dataField="name" /> <SimpleItem dataField="notes" render={this.renderNotes} /> <SimpleItem dataField="picture" render={renderPicture} /> </Form> ); } } export default App;
A simple item can be accompanied by a line of text that gives a hint, for example, of the values that this item accepts. To specify this text, use the helpText property. If filling an item is required, assign true to its isRequired property. In this case, a special mark appears near the item. For more information, see the Additional Marks topic.
jQuery
$(function() { $("#formContainer").dxForm({ formData: { name: "John Heart", phone: "+1(360)684-1334" }, items: [{ dataField: "name", isRequired: true }, { dataField: "phone", helpText: "Example: +1(111)111-1111" }] }); });
Angular
<dx-form [(formData)]="employee"> <dxi-item dataField="name" [isRequired]="true"></dxi-item> <dxi-item dataField="phone" helpText="Example: +1(111)111-1111"></dxi-item> </dx-form>
import { DxFormModule } from "devextreme-angular"; // ... export class AppComponent { employee = { name: "John Heart", phone: "+1(360)684-1334" } } @NgModule({ imports: [ // ... DxFormModule ], // ... })
Vue
<template> <DxForm :form-data="employee"> <DxSimpleItem data-field="name" :is-required="true" /> <DxSimpleItem data-field="phone" help-text="Example: +1(111)111-1111" /> </DxForm> </template> <script> import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import DxForm, { DxSimpleItem } from 'devextreme-vue/form'; export default { components: { DxForm, DxSimpleItem }, data() { return { employee: { name: "John Heart", phone: "+1(360)684-1334" } } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import Form, { SimpleItem } from 'devextreme-react/form'; class App extends React.Component { employee = { name: "John Heart", phone: "+1(360)684-1334" } render() { return ( <Form formData={this.employee}> <SimpleItem dataField="name" isRequired={true} /> <SimpleItem dataField="phone" helpText="Example: +1(111)111-1111" /> </Form> ); } } export default App;
You can modify automatically generated items using the customizeItem function. This function is called for each item before it is rendered. To access the item, use the function's parameter. Its structure mirrors the Simple Item structure, therefore, you can modify any property available for a simple item.
jQuery
$(function() { $("#formContainer").dxForm({ formData: { firstName: "John", lastName: "Heart", email: "jheart@dx-email.com", phone: "+1(213) 555-9392" }, customizeItem: function (item) { if(item.itemType == "simple") { item.label = { location: "top" }; if(item.dataField === "email" || item.dataField === "phone") { item.colSpan = 3; } if(item.dataField === "phone") { item.helpText = "Example: +1 (111) 111-1111"; } } } }); });
Angular
<dx-form [(formData)]="employee" [customizeItem]="form_customizeItem"> </dx-form>
import { DxFormModule } from "devextreme-angular"; // ... export class AppComponent { employee = { firstName: "John", lastName: "Heart", email: "jheart@dx-email.com", phone: "+1(213) 555-9392" } form_customizeItem(item) { if(item.itemType == "simple") { item.label = { location: "top" }; if(item.dataField === "email" || item.dataField === "phone") { item.colSpan = 3; } if(item.dataField === "phone") { item.helpText = "Example: +1 (111) 111-1111"; } } } } @NgModule({ imports: [ // ... DxFormModule ], // ... })
Vue
<template> <DxForm :form-data="employee" :customize-item="customizeItem"> </DxForm> </template> <script> import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import DxForm from 'devextreme-vue/form'; export default { components: { DxForm }, data() { return { employee: { firstName: "John", lastName: "Heart", email: "jheart@dx-email.com", phone: "+1(213) 555-9392" } } }, methods: { customizeItem(item) { if(item.itemType == "simple") { item.label = { location: "top" } if(item.dataField === "email" || item.dataField === "phone") { item.colSpan = 3; } if(item.dataField === "phone") { item.helpText = "Example: +1 (111) 111-1111"; } } } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import Form from 'devextreme-react/form'; class App extends React.Component { employee = { firstName: "John", lastName: "Heart", email: "jheart@dx-email.com", phone: "+1(213) 555-9392" } customizeItem(item) { if(item.itemType == "simple") { item.label = { location: "top" } if(item.dataField === "email" || item.dataField === "phone") { item.colSpan = 3; } if(item.dataField === "phone") { item.helpText = "Example: +1 (111) 111-1111"; } } } render() { return ( <Form formData={this.employee} customizeItem={this.customizeItem}> </Form> ); } } export default App;
See Also
Create an Unbound Simple Item
If you do not need a simple item to be bound to a formData field, create an unbound item. It can be useful if you need, for example, to hide or show some additional information. To create such an item, specify its name, but do not set its dataField property. You will be able to access the item by this name if you need to.
In the following example, the order
item contains the DataGrid UI component. This UI component is shown only when the CheckBox in the show-order
item is checked. Both the order
and show-order
items are unbound items.
jQuery
$(function () { var isOrderShown = false; var form = $("#form").dxForm({ formData: { firstName: "John", lastName: "Smith" }, items: [ "firstName", "lastName", { name: "show-order", label: { text: "Show the order" }, template: function (data, $itemElement) { $("<div>").appendTo($itemElement).dxCheckBox({ value: isOrderShown, onValueChanged: function(e) { isOrderShown = e.value; form.itemOption("order", "visible", isOrderShown); } }); } }, { name: "order", visible: isOrderShown, template: function (data, $itemElement) { $("<div id='dataGrid'>") .appendTo($itemElement) .dxDataGrid({ dataSource: [{ productName: "DesktopLCD 19", cost: 68, salePrice: 110 }, { productName: "DesktopLCD 21", cost: 75, salePrice: 120 }] }); } } ] }).dxForm("instance"); });
Angular
<dx-form [(formData)]="employee"> <dxi-item dataField="firstName"></dxi-item> <dxi-item dataField="lastName"></dxi-item> <dxi-item name="show-order"> <dxo-label text="Show the Order"></dxo-label> <div *dxTemplate> <dx-check-box [(value)]="order.visible"> </dx-check-box> </div> </dxi-item> <dxi-item #order name="order" [visible]="false"> <div *dxTemplate> <dx-data-grid [dataSource]="orders"> </dx-data-grid> </div> </dxi-item> </dx-form>
import { DxFormModule, DxCheckBoxModule, DxDataGridModule } from "devextreme-angular"; // ... export class AppComponent { employee = { firstName: "John", lastName: "Smith" } orders = [{ productName: "DesktopLCD 19", cost: 68, salePrice: 110 }, { productName: "DesktopLCD 21", cost: 75, salePrice: 120 }] } @NgModule({ imports: [ // ... DxFormModule, DxCheckBoxModule, DxDataGridModule ], // ... })
Vue
<template> <DxForm :form-data="employee"> <DxSimpleItem data-field="firstName" /> <DxSimpleItem data-field="lastName" /> <DxSimpleItem name="showOrder"> <DxLabel text="Show the Order" /> <template #default> <DxCheckBox :value.sync="isOrderVisible" /> </template> </DxSimpleItem> <DxSimpleItem name="order" :visible="isOrderVisible"> <template #default> <DxDataGrid :data-source="orders" /> </template> </DxSimpleItem> </DxForm> </template> <script> import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import DxForm, { DxSimpleItem, DxLabel } from 'devextreme-vue/form'; import DxCheckBox from 'devextreme-vue/check-box'; import DxDataGrid from 'devextreme-vue/data-grid'; export default { components: { DxForm, DxSimpleItem, DxLabel, DxCheckBox, DxDataGrid }, data() { return { employee: { firstName: "John", lastName: "Smith" }, orders: [{ productName: "DesktopLCD 19", cost: 68, salePrice: 110 }, { productName: "DesktopLCD 21", cost: 75, salePrice: 120 }], isOrderVisible: false } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import Form, { SimpleItem, Label } from 'devextreme-react/form'; import CheckBox from 'devextreme-react/check-box'; import DataGrid from 'devextreme-react/data-grid'; class App extends React.Component { constructor(props) { super(props); this.state = { isOrderVisible: false }; this.renderCheckBox = this.renderCheckBox.bind(this); this.handleCheckBoxValueChange = this.handleCheckBoxValueChange.bind(this); this.renderDataGrid = this.renderDataGrid.bind(this); } employee = { firstName: "John", lastName: "Smith" } orders = [{ productName: "DesktopLCD 19", cost: 68, salePrice: 110 }, { productName: "DesktopLCD 21", cost: 75, salePrice: 120 }] renderCheckBox = () => { return ( <CheckBox value={this.state.isOrderVisible} onValueChanged={this.handleCheckBoxValueChange} /> ); } handleCheckBoxValueChange = (e) => { this.setState({ isOrderVisible: e.value }); } renderDataGrid = () => { return <DataGrid dataSource={this.orders} /> } render() { return ( <Form formData={this.employee}> <SimpleItem dataField="firstName" /> <SimpleItem dataField="lastName" /> <SimpleItem name="showOrder" render={this.renderCheckBox}> <Label text="Show the Order" /> </SimpleItem> <SimpleItem name="order" visible={this.state.isOrderVisible} render={this.renderDataGrid} /> </Form> ); } } export default App;
See Also
If you have technical questions, please create a support ticket in the DevExpress Support Center.