Accordion

in namespace DotVVM.Bootstrap5.Controls

Wraps a group of AccordionItem controls to create an accordion-like behavior.

Usage & Scenarios

Wraps a group of AccordionItem controls to create an accordion-like behavior. When you expand one of the items inside, the others will collapse. Only one item can be expanded at the same time.

https://getbootstrap.com/docs/5.2/components/accordion/

Sample 1: ExpandedItemIndex

To expand specific AccordioItem use property ExpandedItemIndex with index of chosen item. If index is set to -1 or number higher than number of items, than no item will be expanded.

page.dothtml
ViewModel.cs

<bs:Accordion ExpandedItemIndex="{value: 2}">
    <bs:AccordionItem HeaderText="Header1" ContentText="Text1"/>
    <bs:AccordionItem HeaderText="Header2" ContentText="Text2"/>
    <bs:AccordionItem HeaderText="Header3" ContentText="Text3"/>
</bs:Accordion>
<bs:Accordion ExpandedItemIndex="{value: Index}">
    <bs:AccordionItem HeaderText="Header1" ContentText="Text1"/>
    <bs:AccordionItem HeaderText="Header2" ContentText="Text2"/>
    <bs:AccordionItem HeaderText="Header3" ContentText="Text3"/>
</bs:Accordion>

<dot:Button Click="{staticCommand: Index = 0}" Text="Change Index to 0" />
<dot:Button Click="{staticCommand: Index = 3}" Text="Change Index to 3" />

public class ViewModel : DotvvmViewModelBase
{
    public int Index { get; set; } = 2;
}

Sample 2: Data-binding the Accordion

The ExpandedItemIndex property specifies the index of the accordion item which is selected.

The DataSource property can be used to generate the items from an IEnumerable in the viewmodel.

Then you can use the following properties which tell the control what property of the collection item will be used:

ItemContentText specifies the property of the collection elements to be used as the content of the accordion item.
ItemHeaderText specifies the text in the accordion item header.

page.dothtml
ViewModel.cs

<bs:Accordion   DataSource="{value: Accordions}"
                ItemHeaderText="{value: Header}"
                ItemContentText="{value: Text}"
                ExpandedItemIndex="{value: IndexAdvanced}" />

<dot:Button Click="{command: AddItem()}" Text="Add" />

public class ViewModel : DotvvmViewModelBase
{
    public int IndexAdvanced { get; set; } = 1;
    public List<AccordionModel> Accordions { get; set; }
    public ViewModel()
    {
        Accordions = new List<AccordionModel>()
        {
            new AccordionModel()
            {
                Header = "Item 1",
                Text = "Text 1"
            },
            new AccordionModel()
            {
                Header = "Item 2",
                Text = "Text 2"
            }
        };
    }
    public void AddItem()
    {
        var itemNumber = Accordions.Count + 1;
        Accordions.Add(
            new AccordionModel()
            {
                Header = $"Item {itemNumber}",
                Text = $"Text  {itemNumber}"
            });
        IndexAdvanced = Accordions.Count - 1;
    }

    public class AccordionModel
    {
        public string Header { get; set; }
        public string Text { get; set; }
    }
}

Show all inherited properties

Properties

Name	Type	Description	Notes	Default Value
ClientIDMode	ClientIDMode	Gets or sets the client ID generation algorithm.	attribute inner element static value bindable default	Static
DataContext	Object	Gets or sets a data context for the control and its children. All value and command bindings are evaluated in context of this value. The DataContext is null in client-side templates.	attribute inner element static value bindable default	null
DataSource	IValueBinding<IEnumerable<Object>>	Gets or sets a data-source object from which the child controls will be generated.	attribute inner element static value bindable default	null
ExpandedItemIndex	IValueBinding<Int32>	Gets or sets an index of expanded accordion item. If none of the accordion items are expanded, the index is set to -1.	attribute inner element static value bindable default	null
ID	String	Gets or sets the control client ID within its naming container.	attribute inner element static value bindable default	null
IncludeInPage	Boolean	Gets or sets whether the control is included in the DOM of the page.	attribute inner element static value bindable default	True
ItemContentTemplate	ITemplate	Gets or sets a custom template for accordion item content when DataSource is set.	attribute inner element static value bindable default	null
ItemContentText	String	Gets or sets a plain text for accordion item content when DataSource is set.	attribute inner element static value bindable default	null
ItemHeaderTemplate	ITemplate	Gets or sets a custom template for accordion item header when DataSource is set.	attribute inner element static value bindable default	null
ItemHeaderText	String	Gets or sets a plain text for accordion item header when DataSource is set.	attribute inner element static value bindable default	null
Items	List<IAccordionItem>	Gets or sets the items inside the control.	attribute inner element static value bindable default	null
Visible	Boolean	Gets or sets whether the control is visible. When set to false, `style="display: none"` will be added to this control.	attribute inner element static value bindable default	True

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Accordion

Usage & Scenarios

Sample 1: ExpandedItemIndex

Sample 2: Data-binding the Accordion

Properties

HTML produced by the control

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