我已经构建了一个小型托盘应用程序，它将监视一个文件夹，当添加一个新文件时，它会运行一个作业。工作是观看视频文件并使用 handBrakeCli 将它们转换为 .mp4。我已经解决了所有这些逻辑。我遇到的问题是，如果有多个文件，我希望它对作业进行排队，直到前一个文件完成。我对 c# 相当陌生，我不确定处理这个问题的最佳方法。
一个想法是以某种方式创建一个队列，一个用于按顺序存储命令的文件，然后在该过程完成后执行下一个。我们在这里处理大型电影文件，因此可能需要一段时间。我在具有 8GB RAM 的四核上执行此操作，完成一部完整的电影似乎通常需要大约 30 分钟。我只是不知道该怎么做。
这是我到目前为止的代码。这里有一些位用于未来的功能，所以它指的是一些你不会看到的类，但没关系，因为它们没有在这里使用。欢迎任何建议。
public void Watcher()
{
FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = textBox1.Text + "\\"; //path to watch
watcher.Filter = strfilter; //what types to look for set to * and i will filter later as it cant accept an array
watcher.NotifyFilter = NotifyFilters.FileName | NotifyFilters.DirectoryName; //properties to look at
watcher.IncludeSubdirectories = true; //scan subdirs
watcher.Created += new FileSystemEventHandler(OnChanged);
//TODO: make this only run if the files are of a certain type
watcher.EnableRaisingEvents = true; // start the watcher
}
static bool IsFileLocked(FileInfo file)
{
FileStream stream = null;
try
{
stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);
}
catch (IOException)
{
//the file is unavailable because it is:
//still being written to
//or being processed by another thread
//or does not exist (has already been processed)
return true;
}
finally
{
if (stream != null)
stream.Close();
}
//file is not locked
return false;
}
// Define the event handlers.
private void OnChanged(object source, FileSystemEventArgs e)
{
string sFile = e.FullPath;
//check that file is available
FileInfo fileInfo = new FileInfo(sFile);
while (IsFileLocked(fileInfo))
{
Thread.Sleep(500);
}
if (System.Diagnostics.Process.GetProcessesByName("HandBrakeCLI").Length != 0)
{
Thread.Sleep(500);
}
else
{
//hbOptions hbCl = new hbOptions();
//hbCli = hbCl.HbCliOptions();
if (textBox3.Text != "")
{
hbCli = textBox3.Text.ToString();
}
else
{
hbCli = "-e x264 -q 20 -B 160";
}
string t = e.Name;
string s = t.Substring(0, t.Length - 4); //TODO: fix this its not reliable
file = e.FullPath;
string opath = textBox1.Text.ToString();
cmd = "-i \"" + file + "\" -o \"" + opath + "\\" + s + ".mp4\" " + hbCli;
try
{
for (int i = 0; i < Ext.Count(); i++)
{
if (e.Name.Contains(Ext[i]))
{
Process hb = new Process();
hb.StartInfo.FileName = "D:\\Apps\\Handbrake\\Install\\Handbrake\\HandBrakeCLI.exe";
hb.StartInfo.Arguments = cmd;
notifyIcon.BalloonTipTitle = "Now Converting";
notifyIcon.BalloonTipText = file;
notifyIcon.ShowBalloonTip(2000);
hb.Start();
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
private void button1_Click(object sender, EventArgs e) //ok button
{
//add each array item to the list
for (int i = 0; i < filter.Count(); i++)
{
Ext.Add(filter[i]);
}
if (textBox1.Text != "" && textBox1.Text.Length > 2)
{
Watcher(); //call watcher to run
}
this.WindowState = FormWindowState.Minimized;
}
}