winform 循环播放当前目录下的图片及视频

采用vlc Xabe.FFmpeg

插件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using Xabe.FFmpeg;

namespace PicShow
{
    public partial class Form1 : Form

    {
        int rateSpeed = 3000;
        private List<string> videoFiles = new List<string>();
        private List<string> list = new List<string>();
        private string[] imageFiles;       // 存储图片文件路径
        private int currentIndex = 0;      // 当前显示的图片索引
        private Thread rotateThread;       // 轮播线程


        public Form1()
        {
            InitializeComponent();
        }
        //窗体调用事件
        private void Form1_Load(object sender, EventArgs e)
        {
            pictureBox1.Width = this.Width;
            pictureBox1.Height = this.Height;
            //this.DesktopBounds = Screen.AllScreens[1].Bounds;
            //将当前窗体显示在第二个显示器上
            this.FormBorderStyle = FormBorderStyle.None;
            if (Screen.AllScreens.Count() > 0)
            {
                this.DesktopBounds = Screen.AllScreens[0].Bounds;
            }

            string operatorValue;
            try
            {
                //读取切换间隔时间
                StreamReader sr = new StreamReader("config.ini", Encoding.GetEncoding("utf-8"));
                if (sr.Peek() >= 0)
                {
                    operatorValue = sr.ReadLine();
                    rateSpeed = int.Parse(operatorValue);
                }
                sr.Close();
            }
            catch (Exception ex)
            {
            }

            StartRotate();
            timer1.Start();
        }



        void StartRotate()
        {
            // 读取指定文件夹下的所有图片
            string folderPath = Directory.GetCurrentDirectory(); ;
            try
            {
                rotateThread = new Thread(async () =>
                {
                while (true)
                {
                    imageFiles = Directory.GetFiles(folderPath, "*.*", SearchOption.TopDirectoryOnly);
                    //获取当前目录下的图片和视频文件，保存到list 列表中；
                    GetVideoFiles(folderPath);
                    if (list.Count == 0)
                    {
                        MessageBox.Show("当前目录下没有图片、视频可显示，请添加图片后再运行！", "提示");
                        Application.Exit();
                        return;
                    }
                    // 显示下一张图片或视频 
                    //currentIndex = (currentIndex + 1) % list.Count;
                    for (int i = 0; i < list.Count; i++)
                    {
                        int t = list[i].Length; ;
                        string fileFormat = list[i].Substring(list[i].Length - 3, 3);
                        if (fileFormat == "jpg" || fileFormat == "png")
                        {
                            this.Invoke(new Action(() =>
                                {
                                    pictureBox1.Visible = true;
                                    vlcControl1.Visible = false;
                                }));
                            this.Invoke(new Action(() =>
                            {
                                pictureBox1.Image = Image.FromFile(list[i]);
                            }));
                            // 等待 ***秒后切换图片
                            Thread.Sleep(rateSpeed);

                        }

                        if (fileFormat == "mp4" || fileFormat == "avi")
                        {
                            // 取视频总时长
                            IMediaInfo mediaInfo = await FFmpeg.GetMediaInfo(list[i]);
                            var videoDuration = mediaInfo.VideoStreams.First().Duration;
                            //TimeSpane 格式转换为double
                            double videoLength = videoDuration.TotalSeconds * 1000;
                            //取视频时间长度
                            this.Invoke(new Action(() =>
                            {
                                pictureBox1.Visible = false;
                                vlcControl1.Visible = true;
                            }));
   
                vlcControl1.SetMedia(new System.IO.FileInfo(list[i]));
                vlcControl1.Play();
                Thread.Sleep((int)videoLength);
            }
                        }
        list.Clear();

                    }
});
rotateThread.IsBackground = true;
rotateThread.Start();
            }
            catch (Exception ex)
{
    MessageBox.Show("当前目录没有可显示的图片视频！\r\n" + ex.Message.ToString(), "提示");
    Application.Exit();
}
        }

        private void pictureBox1_Click(object sender, EventArgs e)
{

}
//双击图片显示窗体边框
private void pictureBox1_DoubleClick(object sender, EventArgs e)
{
    if (this.FormBorderStyle == FormBorderStyle.None)
    {
        this.FormBorderStyle = FormBorderStyle.FixedSingle;
    }
    else
    {
        this.FormBorderStyle = FormBorderStyle.None;
        this.DesktopBounds = Screen.AllScreens[1].Bounds;
    }
}

#region 内存回收
[DllImport("kernel32.dll", EntryPoint = "SetProcessWorkingSetSize")]
public static extern int SetProcessWorkingSetSize(IntPtr process, int minSize, int maxSize);
/// <summary>
/// 释放内存
/// </summary>
public static void ClearMemory()
{
    GC.Collect();
    GC.WaitForPendingFinalizers();
    if (Environment.OSVersion.Platform == PlatformID.Win32NT)
    {
        //FrmMian为我窗体的类名
        Form1.SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1);
    }
}
#endregion

private void timer1_Tick(object sender, EventArgs e)
{
    ClearMemory();
}

/// <summary>
　　/// C#获取指定目录下多种指定类型文件
　　/// </summary>
　　/// <param name="filePath">路径</param>
private void GetVideoFiles(string filePath)
{
    DirectoryInfo di = new DirectoryInfo(filePath);
    FileInfo[] afi = di.GetFiles("*.*");
    string fileName;


    for (int i = 0; i < afi.Length; i++)
    {
        fileName = afi[i].Name.ToLower();
        if (fileName.EndsWith(".jpg") || fileName.EndsWith(".png") || fileName.EndsWith(".mp4") || fileName.EndsWith(".avi"))
        {
            list.Add(fileName);
        }
    }
}

private void vlcControl1_VlcLibDirectoryNeeded(object sender, Vlc.DotNet.Forms.VlcLibDirectoryNeededEventArgs e)
{

}

private void vlcControl1_VlcLibDirectoryNeeded_1(object sender, Vlc.DotNet.Forms.VlcLibDirectoryNeededEventArgs e)
{
    var currentAssembly = Assembly.GetEntryAssembly();
    var currentDirectory = new FileInfo(currentAssembly.Location).DirectoryName;
    if (currentDirectory == null)
    {
        return;
    }
    if (IntPtr.Size == 4)
    {
        e.VlcLibDirectory = new DirectoryInfo(Path.GetFullPath(@".\libvlc\win-x86"));
    }
    else
    {
        e.VlcLibDirectory = new DirectoryInfo(Path.GetFullPath(@".\libvlc\win-x64"));
    }
}

        private void vlcControl1_DoubleClick(object sender, EventArgs e)
        {
            if (this.FormBorderStyle == FormBorderStyle.None)
            {
                this.FormBorderStyle = FormBorderStyle.FixedSingle;
            }
            else
            {
                this.FormBorderStyle = FormBorderStyle.None;
                this.DesktopBounds = Screen.AllScreens[1].Bounds;
            }
        }
    }



}