Quel est le meilleur moyen d'afficher un indicateur de «chargement» sur un contrôle WPF?

Question

En C # .Net WPF au cours de UserControl.Load - >

Quel est le meilleur moyen d'afficher un cercle / un indicateur de "chargement" sur le contrôle utilisateur jusqu'à ce que la collecte des données et la restitution de leur contenu soient terminées?

Answer 1

Je créerais généralement une mise en page comme ceci:

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

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

Ensuite, je charge les données sur un thread de travail et, une fois terminé, je mets à jour l'interface utilisateur sous "MainContent". grille et activez la grille, puis définissez la visibilité de LoadingIndicatorPanel sur Réduite.

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 vous recherchez l'animation que vous recherchez, mettez à jour votre question pour qu'elle soit plus précise.

Answer 2

C’est quelque chose sur lequel je travaillais tout récemment pour créer une animation de chargement. Ce xaml produira un anneau animé de cercles.

Mon idée de départ était de créer un adorateur et d'utiliser cette animation en tant que contenu, puis d'afficher l'animation de chargement dans le calque des ornements et de griser le contenu situé en dessous.

Je n'ai pas encore eu la chance de le terminer, alors j'ai pensé poster simplement l'animation pour votre 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

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>

Answer 4

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

this.Cursor = Cursors.Wait;

Answer 5

Utilisez BusyIndicator. C'est une chose Silverlight.

Answer 6

Vous pouvez afficher un 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");