在C＃.Net WPF中，在UserControl.Load->

在完成收集数据并呈现其内容之前，在UserControl上显示旋转圆圈/"正在加载"指示器的最佳方法是什么？

解决方案

我通常会创建这样的布局：

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

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

然后，将数据加载到工作线程上，并在完成后更新" MainContent"网格下的UI并启用该网格，然后将LoadingIndicatorPanel的"可见性"设置为"折叠"。

我不确定这是否是我们要的内容，或者我们​​是否想知道如何在加载标签中显示动画。如果是我们要播放的动画，请更新问题以更具体。

这是我最近为了创建加载动画所做的工作。这个xaml将产生一个动画的圆环。

我最初的想法是创建一个装饰器，并使用此动画作为其内容，然后在装饰器层中显示加载的动画，并在其下方显示为灰色。

还没有机会完成它，所以我想我只发布动画以供我们参考。

<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>

如果我们在Vista上运行它，则也可以只使用默认的等待光标。

this.Cursor = Cursors.Wait;

使用BusyIndi​​cator。这是一件事。

我们可以显示动画gif作为加载元素

XAML

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

后面的代码

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