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Getting Started with .NET MAUI Expander (SfExpander)

10 Jun 202624 minutes to read

This section guides you through setting up and configuring a Expander in your .NET MAUI application. Follow the steps below to add a basic Expander to your project.

To quickly get started with the .NET MAUI Expander, watch this video:

Prerequisites

Before proceeding, ensure the following are set up:

Install .NET 9 SDK or later.
Set up a .NET MAUI environment with Visual Studio 2022 v17.12 or later.

Step 1: Create a new .NET MAUI Project

Go to File > New > Project and choose the .NET MAUI App template.
Name the project and choose a location. Then, click Next.
Select the .NET framework version and click Create.

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package

In Solution Explorer, right-click the project and choose Manage NuGet Packages.
Search for Syncfusion.Maui.Expander and install the latest version.
Ensure the necessary dependencies are installed correctly, and the project is restored.

Step 3: Register the handler

Syncfusion.Maui.Core NuGet is a dependent package for all Syncfusion^® controls of .NET MAUI. In the MauiProgram.cs file, register the handler for Syncfusion^® core.

using Microsoft.Maui;
using Microsoft.Maui.Hosting;
using Microsoft.Maui.Controls.Compatibility;
using Microsoft.Maui.Controls.Hosting;
using Microsoft.Maui.Controls.Xaml;
using Syncfusion.Maui.Core.Hosting;

namespace GettingStarted
{
    public class MauiProgram 
    {
        public static MauiApp CreateMauiApp()
        {
            var builder = MauiApp.CreateBuilder();
            builder
                .UseMauiApp<App>()
                .ConfigureFonts(fonts =>
                {
                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                });

            builder.ConfigureSyncfusionCore();
            return builder.Build();
        }
    }
}

Step 4: Add a Basic Expander

To initialize the control, import the Syncfusion.Maui.Expander namespace into your code.
Initialize SfExpander.

XAML
C#
<ContentPage   
    . . .
    xmlns:syncfusion="clr-namespace:Syncfusion.Maui.Expander;assembly=Syncfusion.Maui.Expander">
    <syncfusion:SfExpander />
</ContentPage>
using Syncfusion.Maui.Expander;
. . .
public partial class MainPage : ContentPage
{
    public MainPage()
    {
        InitializeComponent();
        SfExpander expander = new SfExpander();
    }
}

Prerequisites

Before proceeding, ensure the following are set up:

Install .NET 9 SDK or later.
Set up a .NET MAUI environment with Visual Studio Code.
Ensure that the .NET MAUI workloads are installed and configured as described here.

Step 1: Create a new .NET MAUI Project

Open the command palette by pressing Ctrl+Shift+P and type .NET:New Project and enter.
Choose the .NET MAUI App template.
Select the project location, type the project name and press Enter.
Then choose Create project.

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package

Press Ctrl + ` (backtick) to open the integrated terminal in Visual Studio Code.
Ensure you’re in the project root directory where your .csproj file is located.
Run the command dotnet add package Syncfusion.Maui.Expander to install the Syncfusion^® .NET MAUI Expander package.
To ensure all dependencies are installed, run dotnet restore.

Step 3: Register the handler

Syncfusion.Maui.Core NuGet is a dependent package for all Syncfusion^® controls of .NET MAUI. In the MauiProgram.cs file, register the handler for Syncfusion^® core.

using Microsoft.Maui;
using Microsoft.Maui.Hosting;
using Microsoft.Maui.Controls.Compatibility;
using Microsoft.Maui.Controls.Hosting;
using Microsoft.Maui.Controls.Xaml;
using Syncfusion.Maui.Core.Hosting;

namespace GettingStarted
{
    public class MauiProgram 
    {
        public static MauiApp CreateMauiApp()
        {
            var builder = MauiApp.CreateBuilder();
            builder
                .UseMauiApp<App>()
                .ConfigureFonts(fonts =>
                {
                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                });

            builder.ConfigureSyncfusionCore();
            return builder.Build();
        }
    }
}

Step 4: Add a Basic Expander

To initialize the control, import the Syncfusion.Maui.Expander namespace into your code.
Initialize SfExpander.

XAML
C#
<ContentPage   
    . . .
    xmlns:syncfusion="clr-namespace:Syncfusion.Maui.Expander;assembly=Syncfusion.Maui.Expander">
    <syncfusion:SfExpander />
</ContentPage>
using Syncfusion.Maui.Expander;
. . .
public partial class MainPage : ContentPage
{
    public MainPage()
    {
        InitializeComponent();
        SfExpander expander = new SfExpander();
    }
}

Prerequisites

Before proceeding, ensure the following are set up:

Install .NET 9 SDK or later.
Set up a .NET MAUI environment with JetBrains Rider 2024.3 or later.
Make sure the MAUI workloads are installed and configured as described here.

Step 1: Create a new .NET MAUI Project

Go to File > New Solution, Select .NET (C#) and choose the .NET MAUI App template.
Enter the Project Name, Solution Name, and Location.
Select the .NET framework version and click Create.

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package

In Solution Explorer, right-click the project and choose Manage NuGet Packages.
Search for Syncfusion.Maui.Expander and install the latest version.
Ensure the necessary dependencies are installed correctly, and the project is restored. If not, Open the Terminal in Rider and manually run: dotnet restore

Step 3: Register the handler

Syncfusion.Maui.Core NuGet is a dependent package for all Syncfusion^® controls of .NET MAUI. In the MauiProgram.cs file, register the handler for Syncfusion^® core.

using Microsoft.Maui;
using Microsoft.Maui.Hosting;
using Microsoft.Maui.Controls.Compatibility;
using Microsoft.Maui.Controls.Hosting;
using Microsoft.Maui.Controls.Xaml;
using Syncfusion.Maui.Core.Hosting;

namespace GettingStarted
{
    public class MauiProgram 
    {
        public static MauiApp CreateMauiApp()
        {
            var builder = MauiApp.CreateBuilder();
            builder
                .UseMauiApp<App>()
                .ConfigureFonts(fonts =>
                {
                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                });

            builder.ConfigureSyncfusionCore();
            return builder.Build();
        }
    }
}

Step 4: Add a Basic Expander

To initialize the control, import the Syncfusion.Maui.Expander namespace into your code.
Initialize SfExpander.

XAML
C#
<ContentPage   
    . . .
    xmlns:syncfusion="clr-namespace:Syncfusion.Maui.Expander;assembly=Syncfusion.Maui.Expander">
    <syncfusion:SfExpander />
</ContentPage>
using Syncfusion.Maui.Expander;
. . .
public partial class MainPage : ContentPage
{
    public MainPage()
    {
        InitializeComponent();
        SfExpander expander = new SfExpander();
    }
}

Step 5: Define the Header and Content

The SfExpander is a layout control comprised of the Header and Content. Load any View in the Header and Content. Content visibility of the expander can be set by using the IsExpanded property of the Expander. Users can expand or collapse the Content view by tapping the Header.

Here, the Grid with Labels is loaded in the Header and Content of the expander.

NOTE

Loading the Label as direct children of the Header or Content of the Expander will lead to an exception. So, load the Label inside the Grid to overcome the crash.

XAML
C#
<ContentPage.Content>
    <ScrollView>
        <StackLayout>
            <Label Text="Invoice: #FRU037020142097" FontAttributes="Bold" HorizontalOptions="Center"/>
            <Border StrokeShape="RoundRectangle 8" Margin="8,0,8,8" Stroke="#CAC4D0">
                <Border.Resources>
                    <Style TargetType="Label">
                        <Setter Property="FontFamily" Value="Roboto-Regular"/>
                        <Setter Property="CharacterSpacing" Value="0.25"/>
                    </Style>
                </Border.Resources>
                <syncfusion:SfExpander IsExpanded="True">
                    <syncfusion:SfExpander.Header>
                        <Grid RowDefinitions="48" ColumnDefinitions="35,*">
                            <Label Text="&#xe703;" FontSize="16" Margin="14,2,2,2" VerticalOptions="Center"/>
                            <Label Text="Invoice Date" FontSize="14" Grid.Column="1" VerticalOptions="Center"/>
                        </Grid>
                    </syncfusion:SfExpander.Header>
                    <syncfusion:SfExpander.Content>
                        <Grid Padding="18,8,0,18">
                            <Label Text="11:03 AM, 15 January 2019" FontSize="14"/>
                        </Grid>
                    </syncfusion:SfExpander.Content>
                </syncfusion:SfExpander>
            </Border>
            <!-- Repeat similar pattern for other expanders -->
        </StackLayout>
    </ScrollView>
</ContentPage.Content>
public partial class MainPage : ContentPage
{
    public MainPage()
    {
        InitializeComponent();
        Title = "Invoice";

        Content = new ScrollView
        {
            Content = new StackLayout
            {
                HorizontalOptions = LayoutOptions.Center,
                Children =
                {
                    CreateInvoiceHeader(),
                    CreateInvoiceDate(),
                    CreateItems(),
                    CreatePaymentDetails(),
                    CreateAddress()
                }
            }
        };
    }

    private SfExpander CreateExpander(bool expanded, string icon, string title, View content)
    {
        var headerGrid = new Grid
        {
            ColumnDefinitions =
        {
            new ColumnDefinition { Width = 35 },
            new ColumnDefinition { Width = GridLength.Star }
        },
            HeightRequest = 48
        };

        headerGrid.Add(
            new Label
            {
                Text = icon,
                FontFamily = "AccordionFontIcons",
                FontSize = 16,
                Margin = new Thickness(14, 2),
                VerticalTextAlignment = TextAlignment.Center
            },
            column: 0,
            row: 0
        );

        headerGrid.Add(
            new Label
            {
                Text = title,
                FontFamily = "Roboto-Regular",
                FontSize = 14,
                VerticalOptions = LayoutOptions.Center
            },
            column: 1,
            row: 0
        );

        return new SfExpander
        {
            IsExpanded = expanded,
            Header = headerGrid,
            Content = content
        };
    }

    private View CreateInvoiceHeader()
    {
        return new Label
        {
            Text = "Invoice: #FRU037020142097",
            FontAttributes = FontAttributes.Bold,
            Margin = new Thickness(0, 0, 0, 5),
            HorizontalOptions = LayoutOptions.Center,
            VerticalOptions = LayoutOptions.Center
        };
    }

    private View CreateInvoiceDate()
    {
        return CreateBorder(CreateExpander(true, "\ue703", "Invoice Date",
                new Grid
                {
                    Padding = new Thickness(18, 8, 0, 18),
                    Children =
                    {
                        new Label
                        {
                            Text = "11:03 AM, 15 January 2019",
                            FontFamily = "Roboto-Regular",
                            FontSize = 14
                        }
                    }
                }
            )
        );
    }

    private View CreateItems()
    {
        var grid = new Grid
        {
            Padding = new Thickness(18, 8, 18, 18),
            ColumnDefinitions = { new ColumnDefinition(), new ColumnDefinition() }
        };

        string[] items =
        {
            "2018 Subaru Outback",
            "All-Weather Mats",
            "Door Edge Guard Kit",
            "Rear Bumper Cover",
            "Wheel Locks",
            "Gas Full Tank",
            "Total Amount"
        };

        string[] prices =
        {
            "$35,705.00",
            "$101.00",
            "$162.00",
            "$107.00",
            "$81.00",
            "$64.00",
            "$36,220.00"
        };

        for (int i = 0; i < items.Length; i++)
        {
            grid.Add(new Label
            {
                Text = items[i],
                FontSize = 14,
                FontFamily = "Roboto-Regular",
                TextColor = i == 6 ? Colors.Blue : Colors.Black
            }, 0, i);

            grid.Add(new Label
            {
                Text = prices[i],
                FontSize = 14,
                HorizontalOptions = LayoutOptions.End,
                TextColor = i == 6 ? Colors.Blue : Colors.Black
            }, 1, i);
        }

        return CreateBorder(CreateExpander(false, "\ue701", "Item(s)", grid));
    }

    private View CreatePaymentDetails()
    {
        var grid = new Grid
        {
            Padding = new Thickness(18, 8, 18, 18),
            ColumnDefinitions = { new ColumnDefinition(), new ColumnDefinition() },
            RowDefinitions =
            {
                new RowDefinition(),
                new RowDefinition(),
                new RowDefinition()
            }
        };

        grid.Add(new Label { Text = "Card Payment" }, 0, 0);
        grid.Add(new Label { Text = "$31,200.00", HorizontalOptions = LayoutOptions.End }, 1, 0);

        grid.Add(new Label { Text = "Third-Party coupons" }, 0, 1);
        grid.Add(new Label { Text = "$5,000.00", HorizontalOptions = LayoutOptions.End }, 1, 1);

        grid.Add(new Label
        {
            Text = "Total Amount Paid",
            TextColor = Colors.Blue,
            FontAttributes = FontAttributes.Bold
        }, 0, 2);

        grid.Add(new Label
        {
            Text = "$36,200.00",
            TextColor = Colors.Blue,
            HorizontalOptions = LayoutOptions.End
        }, 1, 2);

        return CreateBorder(CreateExpander(false, "\ue702", "Payment Details", grid));
    }

    private View CreateAddress()
    {
        var grid = new Grid
        {
            Padding = new Thickness(18, 8, 18, 18),
            RowDefinitions =
            {
                new RowDefinition(),
                new RowDefinition(),
                new RowDefinition()
            }
        };

        grid.Add(new Label { Text = "Alex", FontAttributes = FontAttributes.Bold }, 0, 0);
        grid.Add(new Label { Text = "No.8 Blossom St, Washington, DC 20019" }, 0, 1);
        grid.Add(new Label { Text = "(202) 547-3555" }, 0, 2);

        return CreateBorder(CreateExpander(true, "\ue704", "Address", grid));
    }

    private View CreateBorder(View content)
    {
        return new Border
        {
            Stroke = Color.FromArgb("#CAC4D0"),
            StrokeThickness = DeviceInfo.Platform == DevicePlatform.MacCatalyst ? 2 : 1,
            StrokeShape = new RoundRectangle { CornerRadius = 8 },
            WidthRequest = DeviceInfo.Platform == DevicePlatform.MacCatalyst ? 460 : DeviceInfo.Platform == DevicePlatform.WinUI ? 340 : -1,
            Margin = new Thickness(8, 0, 8, 8),
            Content = content
        };
    }
}

The following screenshot illustrates the result of the above code.

Defining the Header and Content

NOTE

View Sample in GitHub.

NOTE

You can refer to our .NET MAUI Expander feature tour page for its groundbreaking feature representations. You can also explore our .NET MAUI Expander Example that shows you how to render and configure the Expander in .NET MAUI.

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How can I help you?

Getting Started with .NET MAUI Expander (SfExpander)

Prerequisites

Step 1: Create a new .NET MAUI Project

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package

Step 3: Register the handler

Step 4: Add a Basic Expander

Prerequisites

Step 1: Create a new .NET MAUI Project

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package

Step 3: Register the handler

Step 4: Add a Basic Expander

Prerequisites

Step 1: Create a new .NET MAUI Project

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package

Step 3: Register the handler

Step 4: Add a Basic Expander

Step 5: Define the Header and Content

How can I help you?

Getting Started with .NET MAUI Expander (SfExpander)

Prerequisites

Step 1: Create a new .NET MAUI Project

Step 2: Install the Syncfusion® MAUI Expander NuGet Package

Step 3: Register the handler

Step 4: Add a Basic Expander

Prerequisites

Step 1: Create a new .NET MAUI Project

Step 2: Install the Syncfusion® MAUI Expander NuGet Package

Step 3: Register the handler

Step 4: Add a Basic Expander

Prerequisites

Step 1: Create a new .NET MAUI Project

Step 2: Install the Syncfusion® MAUI Expander NuGet Package

Step 3: Register the handler

Step 4: Add a Basic Expander

Step 5: Define the Header and Content

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package

Step 2: Install the Syncfusion^® MAUI Expander NuGet Package