Quelle est la meilleure façon d'afficher un indicateur « de chargement » sur un contrôle WPF

Question

En C# .Net WPF Au cours UserControl.Load ->

Quelle est la meilleure façon de montrer un cercle tourbillonnant/« Chargement » indicateur sur UserControl jusqu'à ce qu'il ait fini de rassembler des données et de rendre son contenu?

Answer 1

je généralement créer une mise en page comme ceci:

<Grid> 
    <Grid x:Name="MainContent" IsEnabled="False"> 
    ... 
    </Grid> 

    <Grid x:Name="LoadingIndicatorPanel"> 
    ... 
    </Grid> 
</Grid> 

Puis-je charger les données sur un thread de travail, et quand il est terminé mettre à jour l'interface utilisateur sous la grille de « Maincontent » et activer la grille, puis Définir la visibilité de LoadingIndicatorPanel à réduit.

Je ne sais pas si c'est ce que vous demandiez ou si vous vouliez savoir comment afficher une animation dans l'étiquette de chargement. Si c'est l'animation que vous recherchez, veuillez mettre à jour votre question pour être plus précis.

Answer 2

C'est quelque chose sur lequel je travaillais récemment pour créer une animation de chargement. Ce xaml produira une boucle animée de cercles.

Mon idée initiale était de créer un adorateur et d'utiliser cette animation comme contenu, puis d'afficher l'animation de chargement dans la couche des ornements et de griser le contenu en dessous.

Je n'ai pas encore eu l'occasion de le terminer, alors j'ai pensé que je posterais simplement l'animation à titre de référence.

<Window 
    x:Class="WpfApplication2.Window1" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="Window1" 
    Height="300" 
    Width="300" 
    > 
    <Window.Resources> 
     <Color x:Key="FilledColor" A="255" B="155" R="155" G="155"/> 
     <Color x:Key="UnfilledColor" A="0" B="155" R="155" G="155"/> 

     <Storyboard x:Key="Animation0" FillBehavior="Stop" BeginTime="00:00:00.0" RepeatBehavior="Forever"> 
      <ColorAnimationUsingKeyFrames Storyboard.TargetName="_00" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"> 
       <SplineColorKeyFrame KeyTime="00:00:00.0" Value="{StaticResource FilledColor}"/> 
       <SplineColorKeyFrame KeyTime="00:00:01.6" Value="{StaticResource UnfilledColor}"/> 
      </ColorAnimationUsingKeyFrames> 
     </Storyboard> 

     <Storyboard x:Key="Animation1" BeginTime="00:00:00.2" RepeatBehavior="Forever"> 
      <ColorAnimationUsingKeyFrames Storyboard.TargetName="_01" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"> 
       <SplineColorKeyFrame KeyTime="00:00:00.0" Value="{StaticResource FilledColor}"/> 
       <SplineColorKeyFrame KeyTime="00:00:01.6" Value="{StaticResource UnfilledColor}"/> 
      </ColorAnimationUsingKeyFrames> 
     </Storyboard> 

     <Storyboard x:Key="Animation2" BeginTime="00:00:00.4" RepeatBehavior="Forever"> 
      <ColorAnimationUsingKeyFrames Storyboard.TargetName="_02" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"> 
       <SplineColorKeyFrame KeyTime="00:00:00.0" Value="{StaticResource FilledColor}"/> 
       <SplineColorKeyFrame KeyTime="00:00:01.6" Value="{StaticResource UnfilledColor}"/> 
      </ColorAnimationUsingKeyFrames> 
     </Storyboard> 

     <Storyboard x:Key="Animation3" BeginTime="00:00:00.6" RepeatBehavior="Forever"> 
      <ColorAnimationUsingKeyFrames Storyboard.TargetName="_03" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"> 
       <SplineColorKeyFrame KeyTime="00:00:00.0" Value="{StaticResource FilledColor}"/> 
       <SplineColorKeyFrame KeyTime="00:00:01.6" Value="{StaticResource UnfilledColor}"/> 
      </ColorAnimationUsingKeyFrames> 
     </Storyboard> 

     <Storyboard x:Key="Animation4" BeginTime="00:00:00.8" RepeatBehavior="Forever"> 
      <ColorAnimationUsingKeyFrames Storyboard.TargetName="_04" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"> 
       <SplineColorKeyFrame KeyTime="00:00:00.0" Value="{StaticResource FilledColor}"/> 
       <SplineColorKeyFrame KeyTime="00:00:01.6" Value="{StaticResource UnfilledColor}"/> 
      </ColorAnimationUsingKeyFrames> 
     </Storyboard> 

     <Storyboard x:Key="Animation5" BeginTime="00:00:01.0" RepeatBehavior="Forever"> 
      <ColorAnimationUsingKeyFrames Storyboard.TargetName="_05" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"> 
       <SplineColorKeyFrame KeyTime="00:00:00.0" Value="{StaticResource FilledColor}"/> 
       <SplineColorKeyFrame KeyTime="00:00:01.6" Value="{StaticResource UnfilledColor}"/> 
      </ColorAnimationUsingKeyFrames> 
     </Storyboard> 

     <Storyboard x:Key="Animation6" BeginTime="00:00:01.2" RepeatBehavior="Forever"> 
      <ColorAnimationUsingKeyFrames Storyboard.TargetName="_06" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"> 
       <SplineColorKeyFrame KeyTime="00:00:00.0" Value="{StaticResource FilledColor}"/> 
       <SplineColorKeyFrame KeyTime="00:00:01.6" Value="{StaticResource UnfilledColor}"/> 
      </ColorAnimationUsingKeyFrames> 
     </Storyboard> 

     <Storyboard x:Key="Animation7" BeginTime="00:00:01.4" RepeatBehavior="Forever"> 
      <ColorAnimationUsingKeyFrames Storyboard.TargetName="_07" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"> 
       <SplineColorKeyFrame KeyTime="00:00:00.0" Value="{StaticResource FilledColor}"/> 
       <SplineColorKeyFrame KeyTime="00:00:01.6" Value="{StaticResource UnfilledColor}"/> 
      </ColorAnimationUsingKeyFrames> 
     </Storyboard> 
    </Window.Resources> 

    <Window.Triggers> 
     <EventTrigger RoutedEvent="FrameworkElement.Loaded"> 
      <BeginStoryboard Storyboard="{StaticResource Animation0}"/> 
      <BeginStoryboard Storyboard="{StaticResource Animation1}"/> 
      <BeginStoryboard Storyboard="{StaticResource Animation2}"/> 
      <BeginStoryboard Storyboard="{StaticResource Animation3}"/> 
      <BeginStoryboard Storyboard="{StaticResource Animation4}"/> 
      <BeginStoryboard Storyboard="{StaticResource Animation5}"/> 
      <BeginStoryboard Storyboard="{StaticResource Animation6}"/> 
      <BeginStoryboard Storyboard="{StaticResource Animation7}"/> 
     </EventTrigger> 
    </Window.Triggers> 

    <Canvas> 
     <Canvas Canvas.Left="21.75" Canvas.Top="14" Height="81.302" Width="80.197"> 
      <Canvas.Resources> 
       <Style TargetType="Ellipse"> 
        <Setter Property="Width" Value="15"/> 
        <Setter Property="Height" Value="15" /> 
        <Setter Property="Fill" Value="#FFFFFFFF" /> 
       </Style> 
      </Canvas.Resources> 

      <Ellipse x:Name="_00" Canvas.Left="24.75" Canvas.Top="50"/> 
      <Ellipse x:Name="_01" Canvas.Top="36" Canvas.Left="29.5"/> 
      <Ellipse x:Name="_02" Canvas.Left="43.5" Canvas.Top="29.75"/> 
      <Ellipse x:Name="_03" Canvas.Left="57.75" Canvas.Top="35.75"/> 
      <Ellipse x:Name="_04" Canvas.Left="63.5" Canvas.Top="49.75" /> 
      <Ellipse x:Name="_05" Canvas.Left="57.75" Canvas.Top="63.5"/> 
      <Ellipse x:Name="_06" Canvas.Left="43.75" Canvas.Top="68.75"/> 
      <Ellipse x:Name="_07" Canvas.Top="63.25" Canvas.Left="30" /> 
      <Ellipse Stroke="{x:Null}" Width="39.5" Height="39.5" Canvas.Left="31.75" Canvas.Top="37" Fill="{x:Null}"/> 
     </Canvas> 
    </Canvas> 
</Window> 

Answer 3

Si vous l'utilisez sur Vista, vous pouvez également utiliser le curseur d'attente par défaut.

this.Cursor = Cursors.Wait;

Answer 4

Utilisez BusyIndicator. C'est une chose argentée.

Answer 5

Vous pouvez afficher GIF animé comme élément de chargement

XAML

<WindowsFormsHost> 
    <winForms:PictureBox x:Name="pictureBoxLoading" /> 
</WindowsFormsHost> 

CODE DERRIÈRE

pictureBoxLoading.Image = System.Drawing.Image.FromFile("images/ajax-loader.gif"); 

Answer 6

J'ai amélioré Ian Oakes Concevoir et construire une version évolutive de son indicateur de chargement:

<UserControl x:Class="Mesap.Framework.UI.Controls.BusyIndicator" 
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      mc:Ignorable="d" Name="Root" Foreground="#9b9b9b" 
      d:DesignHeight="100" d:DesignWidth="100"> 
    <Grid> 
     <Grid.Resources> 
      <Storyboard x:Key="Animation0" FillBehavior="Stop" BeginTime="00:00:00.0" RepeatBehavior="Forever"> 
       <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E00" Storyboard.TargetProperty="Opacity"> 
        <LinearDoubleKeyFrame KeyTime="00:00:00.0" Value="1"/> 
        <LinearDoubleKeyFrame KeyTime="00:00:01.6" Value="0"/> 
       </DoubleAnimationUsingKeyFrames> 
      </Storyboard> 

      <Storyboard x:Key="Animation1" BeginTime="00:00:00.2" RepeatBehavior="Forever"> 
       <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E01" Storyboard.TargetProperty="Opacity"> 
        <LinearDoubleKeyFrame KeyTime="00:00:00.0" Value="1"/> 
        <LinearDoubleKeyFrame KeyTime="00:00:01.6" Value="0"/> 
       </DoubleAnimationUsingKeyFrames> 
      </Storyboard> 

      <Storyboard x:Key="Animation2" BeginTime="00:00:00.4" RepeatBehavior="Forever"> 
       <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E02" Storyboard.TargetProperty="Opacity"> 
        <LinearDoubleKeyFrame KeyTime="00:00:00.0" Value="1"/> 
        <LinearDoubleKeyFrame KeyTime="00:00:01.6" Value="0"/> 
       </DoubleAnimationUsingKeyFrames> 
      </Storyboard> 

      <Storyboard x:Key="Animation3" BeginTime="00:00:00.6" RepeatBehavior="Forever"> 
       <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E03" Storyboard.TargetProperty="Opacity"> 
        <LinearDoubleKeyFrame KeyTime="00:00:00.0" Value="1"/> 
        <LinearDoubleKeyFrame KeyTime="00:00:01.6" Value="0"/> 
       </DoubleAnimationUsingKeyFrames> 
      </Storyboard> 

      <Storyboard x:Key="Animation4" BeginTime="00:00:00.8" RepeatBehavior="Forever"> 
       <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E04" Storyboard.TargetProperty="Opacity"> 
        <LinearDoubleKeyFrame KeyTime="00:00:00.0" Value="1"/> 
        <LinearDoubleKeyFrame KeyTime="00:00:01.6" Value="0"/> 
       </DoubleAnimationUsingKeyFrames> 
      </Storyboard> 

      <Storyboard x:Key="Animation5" BeginTime="00:00:01.0" RepeatBehavior="Forever"> 
       <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E05" Storyboard.TargetProperty="Opacity"> 
        <LinearDoubleKeyFrame KeyTime="00:00:00.0" Value="1"/> 
        <LinearDoubleKeyFrame KeyTime="00:00:01.6" Value="0"/> 
       </DoubleAnimationUsingKeyFrames> 
      </Storyboard> 

      <Storyboard x:Key="Animation6" BeginTime="00:00:01.2" RepeatBehavior="Forever"> 
       <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E06" Storyboard.TargetProperty="Opacity"> 
        <LinearDoubleKeyFrame KeyTime="00:00:00.0" Value="1"/> 
        <LinearDoubleKeyFrame KeyTime="00:00:01.6" Value="0"/> 
       </DoubleAnimationUsingKeyFrames> 
      </Storyboard> 

      <Storyboard x:Key="Animation7" BeginTime="00:00:01.4" RepeatBehavior="Forever"> 
       <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E07" Storyboard.TargetProperty="Opacity"> 
        <LinearDoubleKeyFrame KeyTime="00:00:00.0" Value="1"/> 
        <LinearDoubleKeyFrame KeyTime="00:00:01.6" Value="0"/> 
       </DoubleAnimationUsingKeyFrames> 
      </Storyboard> 

      <Style TargetType="Ellipse"> 
       <Setter Property="Fill" Value="{Binding ElementName=Root, Path=Foreground}"/> 

      </Style> 
     </Grid.Resources> 
     <Grid.Triggers> 
      <EventTrigger RoutedEvent="FrameworkElement.Loaded"> 
       <BeginStoryboard Storyboard="{StaticResource Animation0}"/> 
       <BeginStoryboard Storyboard="{StaticResource Animation1}"/> 
       <BeginStoryboard Storyboard="{StaticResource Animation2}"/> 
       <BeginStoryboard Storyboard="{StaticResource Animation3}"/> 
       <BeginStoryboard Storyboard="{StaticResource Animation4}"/> 
       <BeginStoryboard Storyboard="{StaticResource Animation5}"/> 
       <BeginStoryboard Storyboard="{StaticResource Animation6}"/> 
       <BeginStoryboard Storyboard="{StaticResource Animation7}"/> 
      </EventTrigger> 
     </Grid.Triggers> 

     <Grid.ColumnDefinitions> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
      <ColumnDefinition/> 
     </Grid.ColumnDefinitions> 
     <Grid.RowDefinitions> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
      <RowDefinition/> 
     </Grid.RowDefinitions> 

     <Ellipse x:Name="E00" Grid.Row="4" Grid.Column="0" Grid.RowSpan="3" Grid.ColumnSpan="3" Width="Auto" Height="Auto" Opacity="0"/> 
     <Ellipse x:Name="E01" Grid.Row="1" Grid.Column="1" Grid.RowSpan="3" Grid.ColumnSpan="3" Width="Auto" Height="Auto" Opacity="0" /> 
     <Ellipse x:Name="E02" Grid.Row="0" Grid.Column="4" Grid.RowSpan="3" Grid.ColumnSpan="3" Width="Auto" Height="Auto" Opacity="0" /> 
     <Ellipse x:Name="E03" Grid.Row="1" Grid.Column="7" Grid.RowSpan="3" Grid.ColumnSpan="3" Width="Auto" Height="Auto" Opacity="0" /> 
     <Ellipse x:Name="E04" Grid.Row="4" Grid.Column="8" Grid.RowSpan="3" Grid.ColumnSpan="3" Width="Auto" Height="Auto" Opacity="0" /> 
     <Ellipse x:Name="E05" Grid.Row="7" Grid.Column="7" Grid.RowSpan="3" Grid.ColumnSpan="3" Width="Auto" Height="Auto" Opacity="0" /> 
     <Ellipse x:Name="E06" Grid.Row="8" Grid.Column="4" Grid.RowSpan="3" Grid.ColumnSpan="3" Width="Auto" Height="Auto" Opacity="0" /> 
     <Ellipse x:Name="E07" Grid.Row="7" Grid.Column="1" Grid.RowSpan="3" Grid.ColumnSpan="3" Width="Auto" Height="Auto" Opacity="0" /> 
    </Grid> 
</UserControl>