删除文件报错（进程无法访问文件..）

Question

我目前正在调试我的代码，因为它给我一个错误：

The process cannot access the file because it is being used by another process.

而且我认为错误发生在这行代码中

foreach (var filename in filenames)
{
    var file = Path.Combine(filePath, filename);
    mail.Attachments.Add(new Attachment(file));
}

// Send Mail
smtpServer.Send(mail);

DeleteFiles();

我想用此方法发送邮件时删除文件夹中的文件

private void DeleteFiles()
{
    string filePath = Server.MapPath("~/Content/attachments");
    Array.ForEach(Directory.GetFiles(filePath), System.IO.File.Delete);
}

我读到 closing/disposing？ FileStream 等，但我如何在我的代码中使用它？提前致谢。

Answer 1

using(FileStream stream = new FileStream("thepath"))
{
      //do stuff with the file
      stream .Close();
}

现在将关闭并处理该流。

Answer 2

mail.dispose(); 您应该在删除文件之前处理邮件。应该解除对文件的锁定。

foreach (var filename in filenames)
{
    var file = Path.Combine(filePath, filename);
    mail.Attachments.Add(new Attachment(file));
}

// Send Mail
smtpServer.Send(mail);
mail.Dispose();
DeleteFiles();

https://msdn.microsoft.com/en-us/library/0w54a951(v=vs.110).aspx

删除文件报错（进程无法访问文件..）

Deleting files gives an error (The process cannot access the file..)

c#

system.io.directory