我是 WPF 的新手。我来自 C# 和 ASP.NET 背景。
我正在尝试创建一个非常基本的 WPF 应用程序，其中包含 2 个故事板，这些故事板通过交互式开始重载 .Begin(this,true) 以编程方式启动。
当引发 OnCompleted 事件时，将检查另一个故事板的状态。如果状态是情节提要没有运行，它应该开始情节提要。
我在 Completed 处理程序中收到以下错误：
抛出：无法执行操作，因为指定的 Storyboard 未应用于此对象以进行交互式控制。
我相信我使用了正确的 .Begin(this,true) 重载进行交互式控制。
我在下面包含了 MainWindow.cs 和 MainWindow.xaml 代码。我故意不通过 Xaml 中的触发器启动动画。我需要动态启动动画并检查其他多个动画的状态。示例被精简以关注主要问题。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
namespace StoryboardExample
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public Storyboard Storyboard1 { get; set; }
public Storyboard Storyboard2 { get; set; }
public MainWindow()
{
InitializeComponent();
Storyboard1 = (System.Windows.Media.Animation.Storyboard)FindResource("Storyboard1");
Storyboard1.Name = "MegatronStoryboard";
Storyboard1.Completed +=new EventHandler(Storyboard1_Completed);
Storyboard2 = (System.Windows.Media.Animation.Storyboard)FindResource("Storyboard2");
Storyboard2.Name = "TransformerStoryboard";
Storyboard2.Completed += new EventHandler(Storyboard2_Completed);
Storyboard2.Begin(this, true);
}
void Storyboard1_Completed(object sender, EventArgs e)
{
if (Storyboard2.GetCurrentState() == ClockState.Stopped)
{
Storyboard2.Begin(this, true);
//Throws: Cannot perform action because the specified Storyboard was not applied to this object for interactive control.
//I thought I was calling the Begin overload with the correct params for interactive control
//I thought I was calling the Begin overload with the correct params for interactive control .Begin(this,true)
}
}
void Storyboard2_Completed(object sender, EventArgs e)
{
if (Storyboard1.GetCurrentState() == ClockState.Stopped)
{
Storyboard1.Begin(this, true);
//Throws: Cannot perform action because the specified Storyboard was not applied to this object for interactive control.
//I thought I was calling the Begin overload with the correct params for interactive control .Begin(this,true)
}
}
}
}
<Window x:Name="MainWindow1" x:Class="StoryboardExample.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<Storyboard x:Key="Storyboard1">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="cnvsStoryboard1">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:2" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="cnvsStoryboard1">
<EasingDoubleKeyFrame KeyTime="0" Value="0.2"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0.2"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:2" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.2"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)" Storyboard.TargetName="cnvsStoryboard1">
<EasingDoubleKeyFrame KeyTime="0" Value="0.2"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0.2"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:2" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="0.2"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="cnvsStoryboard1">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="26"/>
<EasingDoubleKeyFrame KeyTime="0:0:2" Value="26"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="18"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="cnvsStoryboard1">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="353"/>
<EasingDoubleKeyFrame KeyTime="0:0:2" Value="353"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="5"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="Storyboard2">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="cnvsStoryboard2">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:4" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="cnvsStoryboard2">
<EasingDoubleKeyFrame KeyTime="0" Value="0.2"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0.2"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:4" Value="0.2"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)" Storyboard.TargetName="cnvsStoryboard2">
<EasingDoubleKeyFrame KeyTime="0" Value="0.2"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0.2"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="1"/>
<EasingDoubleKeyFrame KeyTime="0:0:4" Value="0.2"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="cnvsStoryboard2">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="-230"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="-230"/>
<EasingDoubleKeyFrame KeyTime="0:0:4" Value="137"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="cnvsStoryboard2">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1" Value="-10"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="-10"/>
<EasingDoubleKeyFrame KeyTime="0:0:4" Value="-13"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</Window.Resources>
<Canvas x:Name="LayoutRoot">
<Canvas x:Name="cnvsStoryboard1"
Height="203" Canvas.Left="223"
Canvas.Top="-284" Width="253"
Opacity="0"
RenderTransformOrigin="0.5,0.5">
<Canvas.RenderTransform>
<TransformGroup>
<ScaleTransform ScaleX="0.2" ScaleY="0.2"/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Canvas.RenderTransform>
<Image x:Name="imgTransformer" Height="148"
Canvas.Left="42" Source="Images/transformer.png"
Stretch="Fill" Canvas.Top="8" Width="176"
RenderTransformOrigin="0.5,0.5">
<Image.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform X="1" Y="1"/>
</TransformGroup>
</Image.RenderTransform>
</Image>
<Label x:Name="lblTank" Content="Tank" Canvas.Left="101" Canvas.Top="160" FontSize="21.333">
<Label.Foreground>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="Black"/>
<GradientStop Color="#FFCA2828" Offset="1"/>
<GradientStop Color="#FE412424" Offset="0.003"/>
</LinearGradientBrush>
</Label.Foreground>
</Label>
</Canvas>
<Canvas x:Name="cnvsStoryboard2" Height="318"
Canvas.Left="41" Canvas.Top="229"
Width="215" Opacity="0"
RenderTransformOrigin="0.5,0.5">
<Canvas.RenderTransform>
<TransformGroup>
<ScaleTransform ScaleX="0.2" ScaleY="0.2"/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Canvas.RenderTransform>
<Image x:Name="imgMegatron" Height="264" Canvas.Left="33"
Source="Images/Megatron.png"
Stretch="Fill" Canvas.Top="8"
Width="153"/>
<Label x:Name="lblMegatron"
Content="Megatron"
Canvas.Left="56"
Canvas.Top="278"
FontSize="21.333"
Width="107.707"
RenderTransformOrigin="0.696,0.599" Height="40">
<Label.Foreground>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="Black"/>
<GradientStop Color="#FFCA2828" Offset="1"/>
<GradientStop Color="#FE412424" Offset="0.003"/>
</LinearGradientBrush>
</Label.Foreground>
</Label>
</Canvas>
</Canvas>
</Window>
我一直在研究这个，我认为我在 storyboard.Begin(this,true) 重载中的第一个参数可能不正确？
任何帮助是极大的赞赏。
-亚伦