c# - WPF loading spinner

C# - WPF loading spinner

In WPF, you can create a loading spinner (or progress indicator) using XAML and possibly a little code-behind to manage the visibility and animation. Here's a simple example using a ProgressBar with a custom style to make it look like a spinner:

<Window x:Class="YourNamespace.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Loading Spinner Example" Height="350" Width="525"> <Grid> <!-- Your main content goes here --> <!-- Loading Spinner --> <ProgressBar x:Name="loadingSpinner" IsIndeterminate="True" Style="{StaticResource LoadingSpinnerStyle}" Visibility="Collapsed" HorizontalAlignment="Center" VerticalAlignment="Center"/> </Grid> </Window>

Now, you need to define the LoadingSpinnerStyle in your XAML resources or in a separate resource dictionary:

<Window.Resources> <Style x:Key="LoadingSpinnerStyle" TargetType="ProgressBar"> <Setter Property="Width" Value="50"/> <Setter Property="Height" Value="50"/> <Setter Property="Visibility" Value="Collapsed"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ProgressBar"> <Border Background="Transparent" BorderBrush="Gray" BorderThickness="1" CornerRadius="5"> <Grid> <Ellipse x:Name="PART_Ellipse" Width="20" Height="20" Margin="15" VerticalAlignment="Center" HorizontalAlignment="Center" Stroke="Gray" StrokeThickness="2"> <Ellipse.Fill> <RadialGradientBrush> <GradientStop Color="White" Offset="0.1"/> <GradientStop Color="Gray" Offset="1"/> </RadialGradientBrush> </Ellipse.Fill> <Ellipse.RenderTransform> <RotateTransform x:Name="SpinnerRotateTransform" Angle="0"/> </Ellipse.RenderTransform> <Ellipse.Triggers> <EventTrigger RoutedEvent="Loaded"> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetName="SpinnerRotateTransform" Storyboard.TargetProperty="Angle" From="0" To="360" Duration="0:0:1" RepeatBehavior="Forever"/> </Storyboard> </BeginStoryboard> </EventTrigger> </Ellipse.Triggers> </Ellipse> </Grid> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> </Window.Resources>

This style uses an Ellipse to simulate a spinner and rotates it continuously using a Storyboard. The ProgressBar is used because it is a simple control that you can easily customize.

Now, you can programmatically show/hide the loading spinner by setting the Visibility property:

// Show loading spinner loadingSpinner.Visibility = Visibility.Visible; // Hide loading spinner loadingSpinner.Visibility = Visibility.Collapsed;

Adjust the styling and animation properties to match your application's design and requirements.

Examples

  1. "C# WPF loading spinner XAML"

    <Grid> <Ellipse Width="50" Height="50" Fill="Transparent" Stroke="DodgerBlue" StrokeThickness="5"> <Ellipse.Triggers> <EventTrigger RoutedEvent="Loaded"> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="StrokeDashOffset" To="-500" Duration="2" RepeatBehavior="Forever"/> </Storyboard> </BeginStoryboard> </EventTrigger> </Ellipse.Triggers> </Ellipse> </Grid>

    Description: Create a simple loading spinner using an Ellipse in XAML with a StrokeDashOffset animation for rotation.

  2. "C# WPF loading spinner UserControl"

    <!-- LoadingSpinner.xaml --> <UserControl x:Class="YourNamespace.LoadingSpinner" ...> <Grid> <!-- Same Ellipse as in the previous example --> </Grid> </UserControl> 
    // LoadingSpinner.xaml.cs public partial class LoadingSpinner : UserControl { // Code-behind logic, if needed }

    Description: Organize the loading spinner into a reusable UserControl for easy inclusion in different parts of your application.

  3. "C# WPF loading spinner MVVM"

    <!-- LoadingSpinner.xaml --> <UserControl x:Class="YourNamespace.LoadingSpinner" ...> <Grid> <!-- Same Ellipse as in the previous examples --> </Grid> </UserControl> 
    // LoadingSpinner.xaml.cs public partial class LoadingSpinner : UserControl { public LoadingSpinner() { InitializeComponent(); DataContext = this; } // Additional properties, if needed } 
    // ViewModel.cs public class MainViewModel : INotifyPropertyChanged { private bool _isLoading; public bool IsLoading { get { return _isLoading; } set { _isLoading = value; OnPropertyChanged(nameof(IsLoading)); } } // INotifyPropertyChanged implementation }

    Description: Implement a loading spinner in an MVVM (Model-View-ViewModel) architecture, where the spinner's visibility is controlled by a property in the ViewModel.

  4. "C# WPF loading spinner with material design"

    <materialDesign:LoadingProgressBar IsActive="True" />

    Description: Use the Material Design in XAML Toolkit to easily incorporate a loading spinner with various customization options.

  5. "C# WPF loading spinner with MahApps.Metro"

    <mah:ProgressRing IsActive="True" Width="50" Height="50" />

    Description: Utilize the ProgressRing control from the MahApps.Metro library for a loading spinner with a Metro-style design.

  6. "C# WPF loading spinner in code-behind"

    <Grid x:Name="loadingGrid" Visibility="Collapsed"> <!-- Ellipse or other loading indicator --> </Grid> 
    // In code-behind loadingGrid.Visibility = Visibility.Visible; // Perform loading operations loadingGrid.Visibility = Visibility.Collapsed;

    Description: Manually control the visibility of the loading spinner in the code-behind as needed during loading operations.

  7. "C# WPF loading spinner with async/await"

    async void OnButtonClick(object sender, RoutedEventArgs e) { loadingGrid.Visibility = Visibility.Visible; await Task.Run(() => LoadData()); // Simulated async loading loadingGrid.Visibility = Visibility.Collapsed; }

    Description: Integrate the loading spinner with asynchronous operations using async/await to keep the UI responsive during time-consuming tasks.

  8. "C# WPF loading spinner with Prism"

    <Grid> <prism:Interaction.Behaviors> <behaviors:LoadingSpinnerBehavior IsLoading="{Binding IsLoading}" /> </prism:Interaction.Behaviors> <!-- Content of the view --> </Grid>

    Description: Use Prism's Interaction and Behaviors to bind the loading spinner's visibility to a property in the ViewModel.

  9. "C# WPF loading spinner with cancellation token"

    private CancellationTokenSource _cancellationTokenSource; async void OnStartLoadingButtonClick(object sender, RoutedEventArgs e) { _cancellationTokenSource = new CancellationTokenSource(); loadingGrid.Visibility = Visibility.Visible; try { await Task.Run(() => LoadData(_cancellationTokenSource.Token), _cancellationTokenSource.Token); } catch (OperationCanceledException) { // Handle cancellation } finally { loadingGrid.Visibility = Visibility.Collapsed; } } void OnCancelLoadingButtonClick(object sender, RoutedEventArgs e) { _cancellationTokenSource?.Cancel(); }

    Description: Implement a loading spinner with cancellation token support to allow users to cancel long-running operations.

  10. "C# WPF loading spinner with animation library"

    async void OnButtonClick(object sender, RoutedEventArgs e) { loadingGrid.Visibility = Visibility.Visible; await LoadingSpinnerAnimation.PlayAsync(); // Your animation library's method loadingGrid.Visibility = Visibility.Collapsed; }

    Description: Use an animation library (e.g., Lottie-Windows) to incorporate a more dynamic loading spinner with customizable animations.

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