显示动画直到操作完成wpf

时间：2009-10-12 12:06:10

标签： c# wpf animation wait

我想显示一个动画wile一个操作发生...当该操作获取数据并加载我的datagird我想停止那个动画，就像在ASP.NET中使用Ajax或Json但我不知道如何在这里执行相同的操作...

请帮帮我！

媒体元素没有帮助。

2 个答案:

答案 0 :(得分：3)

在StoryBoard设置为RepeatBehavior的情况下使用Forever。在操作开始时启动故事板，并在操作完成时停止它

答案 1 :(得分：3)

using System;
using System.Collections.Generic;
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.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.ComponentModel;
using System.Windows.Media.Animation;

namespace WpfApplication4
{
    public partial class FrontEndWaiting 
    {

        #region IsAnimated bool dependency property
        public static readonly DependencyProperty IsAnimatedProperty;

        #endregion

        static FrontEndWaiting()
        {
            IsAnimatedProperty =
                DependencyProperty.Register(
                "IsAnimated",
                typeof(bool),
                typeof(FrontEndWaiting),
                new UIPropertyMetadata(false));
        }


        /// <summary>
        /// Gets/sets the user controls IsAnimatedProperty.  
        /// This is a dependency property.
        /// The default value is 'true'.
        /// </summary>
        public bool IsAnimated
        {
            get { return (bool)GetValue(IsAnimatedProperty); }
            set { SetValue(IsAnimatedProperty, value); }
        }


        public FrontEndWaiting()
        {
            this.InitializeComponent();
            DependencyPropertyDescriptor prop = DependencyPropertyDescriptor.FromProperty(
                                                    IsAnimatedProperty,
                                                    typeof(FrontEndWaiting));

            prop.AddValueChanged(this, this.OnIsAnimatedPropertyChanged);

        }

        private void OnIsAnimatedPropertyChanged(object sender, EventArgs e)
        {
            Storyboard storyboard = LayoutRoot.FindResource("OnLoaded") as Storyboard;

            if (storyboard != null)
            {
                if (IsAnimated)
                {
                    storyboard.Begin();
                }
                else
                {
                    storyboard.Stop();
                }
            }
        }
    }
}

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    x:Class="WpfApplication4.FrontEndWaiting"
    x:Name="UserControl"
    d:DesignWidth="100" d:DesignHeight="100">


    <Grid x:Name="LayoutRoot">
        <Grid.Resources>
            <Storyboard x:Key="OnLoaded">
                <DoubleAnimationUsingKeyFrames
                BeginTime="00:00:00"
                Storyboard.Target="{Binding ElementName=path}" 
                Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)"
                RepeatBehavior="Forever">
                    <SplineDoubleKeyFrame KeyTime="00:00:00.7000000" Value="360"/>
                </DoubleAnimationUsingKeyFrames>
            </Storyboard>
        </Grid.Resources>
        <Path Stretch="Fill" Stroke="#7F505050"
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              RenderTransformOrigin="0.5,0.5" x:Name="path">
            <Path.RenderTransform>
                <TransformGroup>
                    <ScaleTransform ScaleX="1" ScaleY="1"/>
                    <SkewTransform AngleX="0" AngleY="0"/>
                    <RotateTransform Angle="0"/>
                    <TranslateTransform X="0" Y="0"/>
                </TransformGroup>
            </Path.RenderTransform>
            <Path.Fill>
                <LinearGradientBrush EndPoint="50,100" StartPoint="50,0" SpreadMethod="Pad" MappingMode="Absolute">
                    <GradientStop Color="#E500FF00" Offset="0"/>
                    <GradientStop Color="#3F2BBF2B" Offset="1"/>
                    <GradientStop Color="#9B020C02" Offset="0.32"/>
                    <GradientStop Color="#FFFFFFFF" Offset="0.641"/>
                </LinearGradientBrush>
            </Path.Fill>
        </Path>
    </Grid>
</UserControl>

只需替换“＆lt;”简单＆lt;，这是因为我无法发布我的帖子，字符是不可见的

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