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Backend API
<div id="accordion">
@(Html.DevExtreme().Accordion()
.ID("accordion-container")
.DataSource(d => d.Mvc().LoadAction("GetData").Key("ID"))
.AnimationDuration(300)
.Collapsible(false)
.Multiple(false)
.OnSelectionChanged("accordion_selectionChanged")
.ItemTitleTemplate(@<text><div class="header"><%- Name %></div></text>)
.ItemTemplate(@<text>
<div class="accodion-item">
<div>
<p>
<b><%- City %></b>
(<span><%- State %></span>)
</p>
<p>
<span><%- ZipCode %></span>
<span><%- Address %></span>
</p>
</div>
<div>
<p>Phone: <b><%- Phone %></b></p>
<p>Fax: <b><%- Fax %></b></p>
<p>Website: <a href="<%- Website %>" target="_blank"><%- Website %></a></p>
</div>
</div>
</text>)
)
<div class="options">
<div class="caption">Options</div>
<div class="option">
@(Html.DevExtreme().CheckBox()
.Text("Multiple enabled")
.OnValueChanged("multipleMode_changed")
)
</div>
<div class="option">
@(Html.DevExtreme().CheckBox()
.Text("Collapsible enabled")
.OnValueChanged("collapsibleMode_changed")
)
</div>
<div class="option">
<span>Animation duration</span>
@(Html.DevExtreme().Slider()
.Min(0)
.Max(1000)
.Value(300)
.Label(l => l.Visible(true))
.Tooltip(t => t
.Enabled(true)
.Position(VerticalEdge.Bottom)
)
.OnValueChanged("slider_valueChanged")
)
</div>
<div class="option">
<span class="caption">Selected Items</span>
@(Html.DevExtreme().TagBox()
.ID("tagbox")
.InputAttr("aria-label", "Company Name")
.DisplayExpr("Name")
.ValueExpr("ID")
.Value(new[] { 1 })
.DataSource(d => d.Mvc().LoadAction("GetData").Key("ID"))
.Disabled(true)
.OnValueChanged("tagBox_valueChanged")
)
</div>
</div>
</div>
<script>
function getAccordionInstance() {
return $("#accordion-container").dxAccordion("instance");
}
function getTagBoxInstance() {
return $("#tagbox").dxTagBox("instance");
}
function tagBox_valueChanged(e) {
getAccordionInstance().option("selectedItemKeys", e.value);
}
function accordion_selectionChanged(e) {
getTagBoxInstance().option("value", e.component.option("selectedItemKeys"));
}
function slider_valueChanged(e) {
getAccordionInstance().option("animationDuration", e.value);
}
function multipleMode_changed(e) {
var tagBox = getTagBoxInstance(),
accordion = getAccordionInstance();
accordion.option("multiple", e.value);
tagBox.option("disabled", !e.value);
tagBox.option("value", accordion.option("selectedItemKeys"));
}
function collapsibleMode_changed(e) {
getAccordionInstance().option("collapsible", e.value);
}
</script>
using DevExtreme.AspNet.Data;
using DevExtreme.AspNet.Mvc;
using DevExtreme.NETCore.Demos.Models.SampleData;
using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json;
namespace DevExtreme.NETCore.Demos.Controllers {
public class AccordionController : Controller {
public ActionResult Overview() {
return View();
}
[HttpGet]
public object GetData(DataSourceLoadOptions loadOptions) {
return DataSourceLoader.Load(SampleData.Companies, loadOptions);
}
}
}
using System.Collections.Generic;
namespace DevExtreme.NETCore.Demos.Models.SampleData {
public partial class SampleData {
public static readonly IEnumerable<Company> Companies = new[] {
new Company {
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.dx"
},
new Company {
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.dx"
},
new Company {
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.dx"
},
new Company {
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.dx"
}
};
}
}
using System;
using System.Collections.Generic;
using System.Linq;
namespace DevExtreme.NETCore.Demos.Models {
public class Company {
public int ID { get; set; }
public string Name { get; set; }
public string Address { get; set; }
public string City { get; set; }
public string State { get; set; }
public int ZipCode { get; set; }
public string Phone { get; set; }
public string Fax { get; set; }
public string Website { get; set; }
}
}
#accordion {
height: 700px;
}
#accordion .header {
font-size: 20px;
}
#accordion .header,
#accordion p {
margin: 0;
}
#accordion-container {
margin-right: 400px;
}
.dx-theme-material #accordion .dx-accordion-item-title {
display: flex;
}
.dx-theme-material #accordion .header {
align-self: center;
}
.options {
padding: 20px;
position: absolute;
bottom: 0;
right: 0;
width: 340px;
top: 0;
background-color: rgba(191, 191, 191, 0.15);
}
.options > .caption {
font-weight: 500;
font-size: 18px;
}
.option {
margin-top: 10px;
}
.option > .caption {
margin-top: 10px;
display: inline-block;
}
.option > .dx-tagbox {
margin-top: 2px;
}
Bind Accordion to Data
You can display Accordion items from the items array or a dataSource. If you use the items array, specify the title and text properties.
Configure Item Selection and Collapsibility
Enable the multiple property to allow users to select multiple panels. Use the selectedItems array to store selected items. Toggle the "Multiple enabled" checkbox in the Options demo section to see how it affects the selection.
If you want to allow users to close panels on click, set the collapsible property to true. Check the "Collapsible enabled" checkbox in the Options demo section to enable this feature.
Configure Animation
The animationDuration property allows you to specify the animation duration when users expand/collapse a panel. Use the "Animation duration" slider in the Options demo section to see how it affects the animation.
Customize Item Appearance
Use the itemTemplate and itemTitleTemplate properties to customize the panel appearance. If you use the items array, you can also specify the icon property.