C# 播放ppt 的问题，如何捕获结束的状态

[blueteeth_yl]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.Office.Core; 

namespace PPT
{
    public partial class FraMain : Form
    {
        public FraMain()
        {
            InitializeComponent();
        }

        PowerPoint.Application objApp;
        PowerPoint.Presentations objPresSet;
        PowerPoint._Presentation objPres;
        PowerPoint.Slides objSlides;
        
        //PowerPoint.TextRange   objTextRng;   

        PowerPoint.SlideShowWindows objSSWs;
        PowerPoint.SlideShowTransition objSST;
        PowerPoint.SlideShowSettings objSSS;
        PowerPoint.SlideRange objSldRng;

        public delegate void MyInvoke2();
        // 选中文件
        private void ButSelect_Click(object sender, EventArgs e)
        {
            openFileDialog1.DefaultExt = "*.ppt|*.pps";
            openFileDialog1.Filter = "PPT文件(*.ppt;*.pps)|*.ppt;*.pps";
            openFileDialog1.ShowDialog();
            textBox1.Text = openFileDialog1.FileName;
        }
        //播放文件

        private void butPlay_Click(object sender, EventArgs e)
        {
            ShowPresentation();
            objApp.SlideShowEnd += new PowerPoint.EApplication_SlideShowEndEventHandler(powerpoint_SlideShowEnd);
            GC.Collect();  
        }
       
        private void ShowPresentation()
        {
            String strTemplate;
            //指定一个空的就可以.                 
            strTemplate = textBox1.Text;
            bool bAssistantOn;

            objApp = new PowerPoint.Application();

            objApp.Visible = MsoTriState.msoTrue;
            objPresSet = objApp.Presentations;
            objPres = objPresSet.Open(strTemplate,
                    MsoTriState.msoFalse, MsoTriState.msoTrue, MsoTriState.msoTrue);
            objSlides = objPres.Slides;

            int[] SlideIdx = new int[3];
            for (int i = 0; i < 3; i++) SlideIdx[i] = i + 1;
            objSldRng = objSlides.Range(SlideIdx);
            objSST = objSldRng.SlideShowTransition;
            objSST.AdvanceOnTime = MsoTriState.msoTrue;
            objSST.AdvanceTime = 3;
            objSST.EntryEffect = PowerPoint.PpEntryEffect.ppEffectBoxOut;

            bAssistantOn = objApp.Assistant.On;
            //objApp.Assistant.On = true;
            objSSS = objPres.SlideShowSettings;
            //如过你不想循环放映就把TRUE改成FALSE.   
            objSSS.LoopUntilStopped = MsoTriState.msoFalse;
            objSSS.StartingSlide = 1;
            objSSS.EndingSlide = objSlides.Application.ActivePresentation.Slides.Count;
            objSSS.Run();

            //Wait   for   the   slide   show   to   end.   
            objSSWs = objApp.SlideShowWindows;

                if (objSSWs.Count >= 1)
                {
                    //MyInvoke2 mi2 = new MyInvoke2();
                    //BeginInvoke(mi2);

                    System.Threading.Thread.Sleep(100);
                    return;
                }

            ////Reenable   Office   Assisant,   if   it   was   on:  
 
            if (bAssistantOn)
            {
                objApp.Assistant.On = true;
                objApp.Assistant.Visible = false;
            }

            //Close   the   presentation   without   saving   changes   and   quit   PowerPoint.  

            objPres.Close();
            objApp.Quit();
        }
    }
}

如何捕获结束的状态，就是意思，当ppt播放结束后，它自动弹出一个messagebox来

[happy664618843]

不是可以判断是否是最后一张吗 如果是则exit

[blueteeth_yl]

[Quote=引用 1 楼 happy664618843 的回复:]
不是可以判断是否是最后一张吗 如果是则exit
[/Quote]

没有判断是最后一张啊.
你在仔细看下。

[lackyking]

objApp.SlideShowEnd += new PowerPoint.EApplication_SlideShowEndEventHandler(powerpoint_SlideShowEnd);

你这里不是已经绑定了一个结束事件了吗？
只要
private void powerpoint_SlideShowEnd(PowerPoint.Presentation Pres)
{
//这里写你的代码
}