Question

无法删除文件夹中的图像文件。我知道它被另一个进程锁定和使用但我不知道哪个进程持有它以及如何解锁图像文件以便我可以删除它。试图通过在每个循环结束时放置.Dispose()方法来猜测，但没有运气。＆GT; _＆LT;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;

using System.Net;
using System.Drawing;
using System.IO;

using AForge.Video;
using AForge.Video.VFW; //video recording

namespace example
{
    public partial class LiveRecording2 : System.Web.UI.Page
    {
        AVIWriter writer = new AVIWriter("MSVC");

        protected void Page_Load(object sender, EventArgs e)
        {

        }

         private void Get1Image()
        {
             for (int i = 0; i < 11; i++)
             {
                string ImagePath = Server.MapPath("~\\Videos\\liveRecording2\\") + string.Format("{0}", i + 1) + ".jpg";
                string ip = "http://example.ip.com:portNo/jpeg.cgi";
                string sourceURL = ip;
                WebRequest req = (WebRequest)WebRequest.Create(sourceURL);
                req.Credentials = new NetworkCredential("userName", "password");
                WebResponse resp = req.GetResponse();
                Stream stream = resp.GetResponseStream();
                Bitmap bmp = (Bitmap)Bitmap.FromStream(stream);
                bmp.Save(ImagePath);
            }
        }

        private void doRecording()
        {
            string ImagePath = Server.MapPath("~\\Videos\\liveRecording2\\");
            string SavingPath = Server.MapPath("~\\Videos\\liveRecording2\\"); //recorded video path
            string VideoName = "ICS-" + String.Format("{0:yyyyMMdd_hhmmss}", DateTime.Now) + ".avi";
            writer.Open(SavingPath + VideoName, 640, 480); //create an AVI file and open it for images adding

            // create frame image
            Bitmap image = new Bitmap(320, 240);
            //var cubit = new AForge.Imaging.Filters.ResizeBilinear(320, 240);
            string[] files = Directory.GetFiles(ImagePath);
            writer.FrameRate = 25;
            int index = 0;
            int failed = 0;
            foreach (var item in files)
            {
                index++;
                try
                {
                    image = Image.FromFile(item) as Bitmap;
                    //image = cubit.Apply(image);

                    for (int i = 0; i < 5; i++)
                    {
                        writer.AddFrame(image);
                    }
                }
                catch
                {
                    failed++;
                }
                //this.Text = index + " of " + files.Length + ". Failed: " + failed;
             }
            writer.Close();
            writer.Dispose();
            this.Label1.Text = "status: Video was successfully created";
            this.Label2.Text = "Video Path: ~/Videos/liveRecording2/" + VideoName;
            DeleteImage();
        }

       protected void Button1_Click(object sender, EventArgs e)
        {
            Get1Image();
            doRecording();
        }

        public void DeleteImage()
        {
            DirectoryInfo di = new DirectoryInfo(Server.MapPath("~\\Videos\\liveRecording2\\"));
            FileInfo[] files = di.GetFiles("*.jpg");
                             //.Where(p => p.Extension == ".jpg").ToArray();
            foreach (FileInfo file in files)
            {
                file.Delete(); // **error here**
            }

            this.Label3.Text = "Image deleted";
        }
    }
}

Answer 1

你的问题可能就在这里：

image = Image.FromFile(item) as Bitmap;

尝试在using：

中包装位代码

using(image = Image.FromFile(item) as Bitmap)
{
   //  rest here
}

如何解锁图像文件并将其从特定文件夹中删除？

1 个答案: