从窗体控件winform播放和暂停视频
从窗体控件winform播放和暂停视频
提问于 2014-03-07 10:10:04
我想做一个表单控件，它能够开始，暂停，停止，关闭测验演示(倒计时时间将运行时开始按下)。问题是在一些演示文稿中，有可用的视频(每张幻灯片最多只能包含1个视频，并且并不是每张幻灯片都包含视频)。
以下是我用于在createPresentation方法中添加视频的一些代码片段：
PowerPoint.Slides oSlides = null;
PowerPoint.Slide oSlide = null;
int ctrSoal = 0;
foreach (CQuestion myQuestion in Global.questions)
{
ctrSoal++;
oSlides = oPre.Slides;
oSlide = oSlides.Add(ctrSoal, PowerPoint.PpSlideLayout.ppLayoutTextAndTwoObjects);
oShape2 = oSlide.Shapes[4];
oSlide.Shapes.AddMediaObject(System.IO.Path.Combine(Global.myVideoLocation, myQuestion.video), oShape2.Left, oShape2.Top, oShape2.Width, oShape2.Height);到目前为止，我已经尝试了这个link中的一些解决方案
private void startToolStripMenuItem_Click(object sender, EventArgs e)
{
PowerPoint.Slides oSlides = null;
PowerPoint.Slide oSlide = null;
int ctrSoal = 0;
foreach (CQuestion myQuestion in Global.questions)
{
ctrSoal++;
oSlides = oPre.Slides;
oSlide = oSlides.Add(ctrSoal, PowerPoint.PpSlideLayout.ppLayoutTextAndTwoObjects);
var playVideo = oSlide.TimeLine.MainSequence.FindFirstAnimationFor(oSlide);
}
questionIndex = oPre.SlideShowWindow.View.Slide.SlideIndex - 1;
questionId = myQuiz.questions[questionIndex].id;
if (labelTimer.Text != "Paused")
{
duration = 0;
duration += myQuiz.questions[questionIndex].durationMinute * 60;
duration += myQuiz.questions[questionIndex].durationSecond;
labelKeypadID.Text = "";
for (int i = 0; i < jumlahJawaban; i++)
{
arrChart[i] = 0;
}
}
}但结果是它给了我一个错误：
无效参数无法从Microsoft.Office.Interop.PowerPoint.Slide转换为Microsoft.Office.Interop.PowerPoint.Shape
我想实现的目标是一个表单控件，它可以在用户按下开始按钮(倒计时运行)时播放视频，而不是在幻灯片播放时自动播放。
更新
我试过这个了。程序可以正常运行，但仍无法播放视频。
PowerPoint.Shapes objShapes = null;
objShapes = oPre.Slides[1].Shapes;
foreach (Microsoft.Office.Interop.PowerPoint.Shape s in objShapes)
{
if (s.Name.Contains(".wmv"))
{
s.AnimationSettings.PlaySettings.PlayOnEntry = Office.MsoTriState.msoTrue;
}
}更新 @jonPall
我试过这个：
PowerPoint.Slide oSlide = null;
PowerPoint.Shape objShape = null;
PowerPoint.Slides oSlides = null;
PowerPoint.Shapes objShapes = null;
int ctrSoal = 1;
oSlides = oPre.Slides;
oSlide = oSlides.Add(ctrSoal, PowerPoint.PpSlideLayout.ppLayoutTextAndTwoObjects);
objShapes = oPre.Slides[1].Shapes;
var playVideo = oSlide.TimeLine.MainSequence.FindFirstAnimationFor(objShape);
playVideo.Timing.TriggerType = PowerPoint.MsoAnimTriggerType.msoAnimTriggerWithPrevious;我的程序可以运行没有错误，但当我按下开始(播放视频和运行倒计时计时器)它给错误
序列(未知成员)：非法值。对象不存在。
更新 @Andy
PowerPoint.Slide oSlide = null;
PowerPoint.Slides oSlides = null;
PowerPoint.Shapes objShapes = null;
int ctrSoal = 1;
oSlides = oPre.Slides;
oSlide = oSlides.Add(ctrSoal, PowerPoint.PpSlideLayout.ppLayoutTextAndTwoObjects);
int indexSlide = oPre.SlideShowWindow.View.Slide.SlideIndex;
objShapes = oPre.Slides[indexSlide].Shapes;
foreach (Microsoft.Office.Interop.PowerPoint.Shape objShape in objShapes) {
string extension = Path.GetExtension(objShape.Name);
if (extension == ".wmv") {
//MessageBox.Show("Video Available");
var playVideo = oSlide.TimeLine.MainSequence.FindFirstAnimationFor(objShape);
playVideo.Timing.TriggerType = PowerPoint.MsoAnimTriggerType.msoAnimTriggerWithPrevious;
}
}使用上面的脚本，我可以检测活动幻灯片中是否包含视频
但是~var~ playVideo在包含视频的幻灯片中仍然为空
我错过了什么？
回答 1
Stack Overflow用户
发布于 2014-04-19 14:36:08
试试这个：
playVideo.Timing.TriggerType = PowerPoint.MsoAnimTriggerType.msoAnimTriggerWithPrevious;页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/22240109
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