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Show/Hide Accordion item in Blazor Accordion component

03 Aug 2021 / 4 minutes to read

Accordion provides a support to Show/Hide the specified accordion item using following ways.

  • Using conditional rendering.
  • Using property.

Using conditional rendering

Accordion provides support to Show/Hide the specified accordion item dynamically using conditional if statement.

In the following demo, specified accordion item are Show/Hide dynamically when you click Show/Hide Item button.

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@using Syncfusion.Blazor.Navigations
@using Syncfusion.Blazor.Buttons

<SfButton @onclick="ShowHideItemClick" Content="Show/Hide item"></SfButton>
<br />
<br />

<SfAccordion>
<AccordionItems>
    <AccordionItem Expanded="true">
        <HeaderTemplate>
            <div>ASP.NET</div>
        </HeaderTemplate>
        <ContentTemplate>
            <div>Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications and XML Web services. ASP.NET pages execute on the server and generate markup such as HTML, WML, or XML that is sent to a desktop or mobile browser. ASP.NET pages use a compiled,event-driven programming model that improves performance and enables the separation of application logic and user interface.</div>
        </ContentTemplate>
    </AccordionItem>
    @if (ShowItem)
    {
        <AccordionItem>
            <HeaderTemplate>
                <div>ASP.NET MVC</div>
            </HeaderTemplate>
            <ContentTemplate>
                <div>The Model-View-Controller (MVC) architectural pattern separates an application into three main components: the model, the view, and the controller. The ASP.NET MVC framework provides an alternative to the ASP.NET Web Forms pattern for creating Web applications. The ASP.NET MVC framework is a lightweight, highly testable presentation framework that (as with Web Forms-based applications) is integrated with existing ASP.NET features, such as master pages and membership-based authentication.</div>
            </ContentTemplate>
        </AccordionItem>
    }
    <AccordionItem>
        <HeaderTemplate>
            <div>ASP.NET Razor</div>
        </HeaderTemplate>
        <ContentTemplate>
            <div>Razor is an ASP.NET programming syntax used to create dynamic web pages with the C# or Visual Basic .NET programming languages. Razor was in development in June 2010 and was released for Microsoft Visual Studio 2010 in January 2011. Razor is a simple-syntax view engine and was released as part of MVC 3 and the WebMatrix tool set.</div>
        </ContentTemplate>
    </AccordionItem>
    <AccordionItem>
        <HeaderTemplate>
            <div>JavaScript</div>
        </HeaderTemplate>
        <ContentTemplate>
            <div>JavaScript (JS) is an interpreted computer programming language.It was originally implemented as part of web browsers so that client-side scripts could interact with the user, control the browser, communicate asynchronously, and alter the document content that was displayed.</div>
        </ContentTemplate>
    </AccordionItem>
</AccordionItems>
</SfAccordion>

@code {
public bool ShowItem = true;
void ShowHideItemClick()
{
    ShowItem = !ShowItem;
}
}

Using property

Accordion provides support to Show/Hide the specified accordion item dynamically using accordion item Visible property.

In the following demo, specified accordion item are Show/Hide dynamically when you click Show/Hide Item button.

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@using Syncfusion.Blazor.Navigations
@using Syncfusion.Blazor.Buttons

<SfButton @onclick="ShowHideItemClick" Content="Show/Hide item"></SfButton>
<br />
<br />

<SfAccordion>
<AccordionItems>
    <AccordionItem Expanded="true">
        <HeaderTemplate>
            <div>ASP.NET</div>
        </HeaderTemplate>
        <ContentTemplate>
            <div>Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications and XML Web services. ASP.NET pages execute on the server and generate markup such as HTML, WML, or XML that is sent to a desktop or mobile browser. ASP.NET pages use a compiled,event-driven programming model that improves performance and enables the separation of application logic and user interface.</div>
        </ContentTemplate>
    </AccordionItem>
    <AccordionItem Visible=@ShowItem>
        <HeaderTemplate>
            <div>ASP.NET MVC</div>
        </HeaderTemplate>
        <ContentTemplate>
            <div>The Model-View-Controller (MVC) architectural pattern separates an application into three main components: the model, the view, and the controller. The ASP.NET MVC framework provides an alternative to the ASP.NET Web Forms pattern for creating Web applications. The ASP.NET MVC framework is a lightweight, highly testable presentation framework that (as with Web Forms-based applications) is integrated with existing ASP.NET features, such as master pages and membership-based authentication.</div>
        </ContentTemplate>
    </AccordionItem>
    <AccordionItem>
        <HeaderTemplate>
            <div>ASP.NET Razor</div>
        </HeaderTemplate>
        <ContentTemplate>
            <div>Razor is an ASP.NET programming syntax used to create dynamic web pages with the C# or Visual Basic .NET programming languages. Razor was in development in June 2010 and was released for Microsoft Visual Studio 2010 in January 2011. Razor is a simple-syntax view engine and was released as part of MVC 3 and the WebMatrix tool set.</div>
        </ContentTemplate>
    </AccordionItem>
    <AccordionItem>
        <HeaderTemplate>
            <div>JavaScript</div>
        </HeaderTemplate>
        <ContentTemplate>
            <div>JavaScript (JS) is an interpreted computer programming language.It was originally implemented as part of web browsers so that client-side scripts could interact with the user, control the browser, communicate asynchronously, and alter the document content that was displayed.</div>
        </ContentTemplate>
    </AccordionItem>
</AccordionItems>
</SfAccordion>

@code {
public bool ShowItem = true;
void ShowHideItemClick()
{
    ShowItem = !ShowItem;
}
}

Output be like the below.

Dynamic Show/Hide AccordionItems