Question

I am writing an application that allows the user to import a picture from the computer and view it in my application. The user also has an import button under the picture and he/she can select the picture's destination in the computer.

My problem is that I get following exception:

System.IO.IOException: 'The process cannot access the file 'D:\Workspaces_Foo\Foo\Theme\MyPic.png' because it is being used by another process.'

when I debug it I find the line where it's breaking. It is in:

string image = Constants.ImageName;
if (image != "NONE")
{
   using (var stream = File.OpenRead(SourceDir + ImageName))
   {  
     Directory.CreateDirectory(Path.GetDirectoryName(DestinationDir + "\\" + image));

     File.Copy(SourceDir + "\\" + image, DestinationDir + "\\" + image, true); //breaks here...
   }                
 }

I assumed that by using a filestream it would've allowed me to continue with my picture transfer. Can anyone tell me why I am getting this error?

Answer 1

您正在打开该文件的流。这将打开文件并将其标记为正在使用中。

然后你使用File.Copy来复制它，但是操作系统说文件正在使用中（它不够聪明，注意到你的进程正在使用它！）

忘掉流，试试吧。

var processes = Process.GetProcesses()
    .Where(p=> p.MainWindowHandle != 0)
    .ToArray();

Having issues setting up a simple filestream

1 个答案: