C#利用微软DirectX做的视频播放器

2008-12-07 11:11

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.DirectX.AudioVideoPlayback;
namespace playVideoProject
{
    public partial class Form1 : Form
    {
        private Video myvideo = null;
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            openFile.InitialDirectory=Application.StartupPath;//获取对话框显示时的初始目录
            if (openFile.ShowDialog() == DialogResult.OK)
            {
                // 记录panel组件的大小
                int height = panel1.Height;
                int width = panel1.Width;
                // 如果存在打开的Video文件，释放它
                if (myvideo != null)
                {
                    myvideo.Dispose();
                }
                // 打开一个新的Video文件
                myvideo = new Video(openFile.FileName);
                // 把Video文件分配给创建的Panel组件
                myvideo.Owner = panel1;
                // 以记录的panel组件的大小来重新定义
                panel1.Width = width;
                panel1.Height = height;
                // 播放AVI文件的第一帧，主要是为了在panel中显示
                myvideo.Play();
                myvideo.Pause();
            }
            //确定窗体中的各按钮状态
            if (myvideo == null)
            {
                button2.Enabled = false;
                button3.Enabled = false;
                button4.Enabled = false;
            }
            else
            {
                button2.Enabled = true;
                button3.Enabled = true;
                button4.Enabled = true;
            }
        }
        private void button3_Click(object sender, EventArgs e)
        {
            if (myvideo != null)
            {
                myvideo.Pause();
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            if (myvideo != null)
            {
                myvideo.Play();
            }
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            if (myvideo == null)
            {
                button2.Enabled = false;
                button3.Enabled = false;
                button4.Enabled = false;
            }
            else
            {
                button2.Enabled = true;
                button3.Enabled = true;
                button4.Enabled = true;
            }
        }
        private void button4_Click(object sender, EventArgs e)
        {
            if (myvideo != null)
            {
                myvideo.Stop();
            }
        }
        private void panel1_Paint(object sender, PaintEventArgs e)
        {
        }
    }
}