我有一个单一的视频（时间：3秒），我需要创建2个状态

1的视频应该始终达到1.5秒，并从一开始就玩。

 时间跨度TS =新的时间跨度（0，0，0，1，500）;
时间跨度ts_Start =新时间跨度（0，0，0，0，0）;
如果（mediaElement.position == TS）
  mediaElement.position = ts_Start; //不工作这一块code
 

2 - 当我preSS一个按钮，该视频应该发挥的全视频（3秒）。 （简单的标志，布尔）

所以我的问题是，我怎么知道什么时候该 mediaelement.position =1.5秒？....我想到了一个方法，比如播放或类似的东西这一点。

我解决了问题... :) :) ....

我决定让我自己的应用程序与采取其他论坛很多想法。

我的解决办法是比我的计划，我用2视频，2 mediaElements，一个mediaEnded事件和布尔变量来恰克视频....容易

和完美的作品！ 解决方案是这里 ------>（解决方案，及评析）

在我的应用程序，我没有使用性能，如时钟，时间安排，DispatcherTimer，或者像CurrentTimeInvalidate任何情况下，我只是用MediaEnded事件和布尔变量。 ：） 不再。我有2个视频（1.5秒和3秒）。 MediaEnded时（媒体1.5秒）mediaElement1,5sec.Position = TimeSpam.Zero;和MediElement3sec.Position = TimeSpam.Zero，当我点击该按钮，我只是评估了3秒变量（布尔）和播放COMPLET视频。

，源$ C ​​$ C在这里：MainWindow.xaml

 ＆LT;窗​​口x：类=wpf_TestVideos.MainWindow
    的xmlns =htt​​p://schemas.microsoft.com/winfx/2006/xaml/$p$psentation
    的xmlns：X =htt​​p://schemas.microsoft.com/winfx/2006/xaml
    标题=主窗口高度=371宽度=525加载=Window_Loaded＆GT;
＆LT;电网＆GT;
    ＆LT; MediaElement的高度=268的Horizo​​ntalAlignment =左保证金=141,12,0,0NAME =mediaElement15secVerticalAlignment =热门WIDTH =237MediaEnded =mediaElement15sec_MediaEnded/＆GT;
    ＆LT; MediaElement的高度=268的Horizo​​ntalAlignment =左保证金=142,12,0,0NAME =mediaElement3secVerticalAlignment =热门WIDTH =236/＆GT;
    ＆LT;按钮内容=装载高度=34的Horizo​​ntalAlignment =左保证金=12,286,0,0NAME =btLoadVerticalAlignment =热门WIDTH =73点击=btLoad_Click/＆GT;
    ＆LT;按钮内容=INICIO JUEGO高度=23的Horizo​​ntalAlignment =左保证金=128,286,0,0NAME =btStartVerticalAlignment =热门WIDTH =86点击=btStart_Click/＆GT ;
    ＆LT;按钮内容=＆放大器; QUOT; Reconoce Gesto和放大器; QUOT;身高=23的Horizo​​ntalAlignment =左保证金=285,286,0,0NAME =btGestureVerticalAlignment =热门WIDTH =108点击=btGesture_Click/＆GT;
＆LT; /网格＆GT;
 

MainWindow.xaml.cs：

 使用系统;
使用System.IO;
System.Collections中使用;
使用System.Collections.Generic;
使用System.Diagnostics程序;
使用System.Windows;
使用System.Windows.Forms的;
使用System.Windows.Media;
使用System.Windows.Media.Imaging;
使用System.Windows.Shapes;
使用System.Windows.Controls的;
使用System.Windows.Data;
使用System.Windows.Documents;
使用System.Windows.Input;
使用System.Windows.Navigation;
使用System.Linq的;
使用System.Text;
使用了System.Runtime.InteropServices;
使用System.Windows.Interop;
使用System.Windows.Media.Animation;
使用的System.Threading;

命名空间wpf_TestVideos
{
    ///＆LT;总结＆gt;
    ///为MainWindow.xaml交互逻辑
    ///＆LT; /总结＆gt;
公共部分类主窗口：窗口
{
    公共主窗口（）
    {
        的InitializeComponent（）;
    }

    字符串VideoLocation = System.IO.Path.GetDirectoryName（System.Windows.Forms.Application.ExecutablePath）;
    字符串sFileName =;
    字符串sFileName2 =;
    布尔bVideoLoop = TRUE;
    TranslateTransform反=新TranslateTransform（）;

    私人无效btLoad_Click（对象发件人，RoutedEventArgs E）
    {
        mediaElement15sec.LoadedBehavior = MediaState.Manual;
        mediaElement3sec.LoadedBehavior = MediaState.Manual;
        btGesture.IsEnabled = TRUE;
        btStart.IsEnabled = TRUE;
        btLoad.IsEnabled = FALSE;
        DirectoryInfo的DF =新的DirectoryInfo（VideoLocation）;
        如果（df.Exists）
        {
            sFileName = VideoLocation + @\ Krown_test_loop.mov;
            mediaElement15sec.Source =新的URI（sFileName）;
            mediaElement15sec.Stretch = Stretch.Fill;
            sFileName2 = VideoLocation + @\ Krown_test_7.mov;
            mediaElement3sec.Source =新的URI（sFileName2）;
            mediaElement3sec.Stretch = Stretch.Fill;
        }
        其他
        {
            System.Windows.Forms.MessageBox.Show（没有本质puede cargar EL视频，TestAll）;
        }
    }

    私人无效btStart_Click（对象发件人，RoutedEventArgs E）
    {
        mediaElement15sec.Position = TimeSpan.Zero;
        mediaElement3sec.Position = TimeSpan.Zero;
        mediaElement15sec.Play（）;
        mediaElement3sec.Play（）;
        bVideoLoop = TRUE;
        //VisualStateManager.GoToState(mediaElement15sec，Bring1,5ToFront，真正的）;
    }

    私人无效mediaElement15sec_MediaEnded（对象发件人，RoutedEventArgs E）
    {
        如果（bVideoLoop）
        {
            mediaElement15sec.Position = TimeSpan.Zero;
            mediaElement3sec.Position = TimeSpan.Zero;
        }
    }

    私人无效btGesture_Click（对象发件人，RoutedEventArgs E）
    {
        bVideoLoop = FALSE;
        // Animacion_Opacidad（bVideoLoop）;
        //VisualStateManager.GoToState(mediaElement3sec，Bring300ToFront，真正的）;
    }

    私人无效Animacion_Opacidad（布尔BLOOP）
    {
        mediaElement15sec.RenderTransform =反;
        如果（！BLOOP）
        {
            DoubleAnimation是anim1 =新DoubleAnimation是（1，0，TimeSpan.FromSeconds（1））;
            trans.BeginAnimation（OpacityProperty，anim1）;
        }
    }

    私人无效Window_Loaded（对象发件人，RoutedEventArgs E）
    {
        btGesture.IsEnabled = FALSE;
        btStart.IsEnabled = FALSE;
        btLoad.IsEnabled = TRUE;
    }


}
 

}

i have a single video (duration: 3 seconds) and i need to create 2 states

1- the video should always reach the second 1.5 and play it from the start.

TimeSpan ts = new TimeSpan(0, 0, 0, 1, 500);
TimeSpan ts_Start = new TimeSpan(0, 0, 0, 0, 0);
if (mediaElement.position == ts)
  mediaElement.position = ts_Start; //doesnt work this block code

2- when i press a button, the video should play the full video (3 seconds). (simple flag, boolean)

so my question is, how do i know when the mediaelement.position = 1.5 seconds ??.... i thought of a method such as playing or something like that.

i resolved the problem... :) :) ....

i decide make me own application with many ideas that had taken of other forums.

My solution was easier than i planned, i used 2 videos, 2 mediaElements, a mediaEnded event and boolean variable to chage the video....

and works perfectly! Solution are here ------> (Solution, and coments)

in my app, i didn't have to use properties like clocks, TimeLines, DispatcherTimer, or any event like a CurrentTimeInvalidate, i just used the MediaEnded event and a boolean variable. :) no more. i have 2 videos (1,5 seconds and 3 seconds). when MediaEnded(media 1,5 seconds) mediaElement1,5sec.Position = TimeSpam.Zero; and MediElement3sec.Position = TimeSpam.Zero, and when i clicked the button, i just evaluated the variable (boolean) and play complet video of 3 seconds.

however, the source code are here: MainWindow.xaml

<Window x:Class="wpf_TestVideos.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="371" Width="525" Loaded="Window_Loaded">
<Grid>
    <MediaElement Height="268" HorizontalAlignment="Left" Margin="141,12,0,0" Name="mediaElement15sec" VerticalAlignment="Top" Width="237" MediaEnded="mediaElement15sec_MediaEnded" />
    <MediaElement Height="268" HorizontalAlignment="Left" Margin="142,12,0,0" Name="mediaElement3sec" VerticalAlignment="Top" Width="236" />
    <Button Content="Load" Height="34" HorizontalAlignment="Left" Margin="12,286,0,0" Name="btLoad" VerticalAlignment="Top" Width="73" Click="btLoad_Click" />
    <Button Content="Inicio Juego" Height="23" HorizontalAlignment="Left" Margin="128,286,0,0" Name="btStart" VerticalAlignment="Top" Width="86" Click="btStart_Click" />
    <Button Content="&quot;Reconoce Gesto&quot;" Height="23" HorizontalAlignment="Left" Margin="285,286,0,0" Name="btGesture" VerticalAlignment="Top" Width="108" Click="btGesture_Click" />
</Grid>

MainWindow.xaml.cs:

using System;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Windows;
using System.Windows.Forms;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Navigation;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Interop;
using System.Windows.Media.Animation;
using System.Threading;

namespace wpf_TestVideos
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    string VideoLocation = System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.ExecutablePath);
    string sFileName = "";
    string sFileName2 = "";
    bool bVideoLoop = true;
    TranslateTransform trans = new TranslateTransform();

    private void btLoad_Click(object sender, RoutedEventArgs e)
    {
        mediaElement15sec.LoadedBehavior = MediaState.Manual;
        mediaElement3sec.LoadedBehavior = MediaState.Manual;
        btGesture.IsEnabled = true;
        btStart.IsEnabled = true;
        btLoad.IsEnabled = false;
        DirectoryInfo df = new DirectoryInfo(VideoLocation);
        if (df.Exists)
        {
            sFileName = VideoLocation + @"\Krown_test_loop.mov";
            mediaElement15sec.Source = new Uri(sFileName);
            mediaElement15sec.Stretch = Stretch.Fill;
            sFileName2 = VideoLocation + @"\Krown_test_7.mov";
            mediaElement3sec.Source = new Uri(sFileName2);
            mediaElement3sec.Stretch = Stretch.Fill; 
        }
        else
        {
            System.Windows.Forms.MessageBox.Show("No se puede cargar el video", "TestAll");
        }
    }

    private void btStart_Click(object sender, RoutedEventArgs e)
    {
        mediaElement15sec.Position = TimeSpan.Zero;
        mediaElement3sec.Position = TimeSpan.Zero;
        mediaElement15sec.Play();
        mediaElement3sec.Play();
        bVideoLoop = true;
        //VisualStateManager.GoToState(mediaElement15sec, "Bring1,5ToFront", true);
    }

    private void mediaElement15sec_MediaEnded(object sender, RoutedEventArgs e)
    {
        if (bVideoLoop)
        {
            mediaElement15sec.Position = TimeSpan.Zero;
            mediaElement3sec.Position = TimeSpan.Zero;
        }
    }

    private void btGesture_Click(object sender, RoutedEventArgs e)
    {
        bVideoLoop = false;
        //Animacion_Opacidad(bVideoLoop);
        //VisualStateManager.GoToState(mediaElement3sec, "Bring300ToFront", true);
    }

    private void Animacion_Opacidad(bool bLoop)
    {
        mediaElement15sec.RenderTransform = trans;
        if (!bLoop)
        {
            DoubleAnimation anim1 = new DoubleAnimation(1, 0, TimeSpan.FromSeconds(1));
            trans.BeginAnimation(OpacityProperty, anim1);
        }
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        btGesture.IsEnabled = false;
        btStart.IsEnabled = false;
        btLoad.IsEnabled = true;
    }


}

}