create file with FileStream and apply FileAttributes

Question

Is it possible while creating the file with FileStream also apply FileAttributes at the same time? I would like to create file for stream writing with FileAttributes.Temporary file attribute.

http://msdn.microsoft.com/en-us/library/system.io.filestream.filestream.aspx — Dave, Sep 28 '11 at 07:14

score 0 · Answer 1 · answered Sep 28 '11 at 07:16

0

You can use FileOptions.DeleteOnClose as one of parameters. File will be automatically removed after you finish your operations and dispose a stream.

answered Sep 28 '11 at 07:16

Sergei B.

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I am developing File Queue system and I use FileAttributes.Temporary as special attribute for queue actions. So when file is created for file streaming I would like to assign FileAttributes.Temporary imidiatlly. – Tomas Sep 28 '11 at 07:18
Just look through overloads and you'll answer your question by yourself - There is no overload to set FileAttributes immediately. You could create an extension method if you want to do it in a one line, so you'll be able to use `using` construct and dispose the stream properly without using try..finally. So, why do you need it in a one line? – Sergei B. Sep 28 '11 at 07:34

Frederik Gheysels · Answer 2 · 2017-11-13T13:16:19.487

You can do this if you use the Win32 CreateFile method

uint readAccess = 0x00000001;
uint writeAccess = 0x00000002;

uint readShare = 0x00000001;   

uint createAlways = 2;

uint tempAttribute = 0x100;
uint deleteOnClose = 0x04000000; 

new FileStream(new SafeFileHandle(NativeMethods.CreateFile("filename", 
                                                           readAccess | writeAccess, 
                                                           readShare, 
                                                           IntPtr.Zero, 
                                                           createAlways, 
                                                           tempAttribute | deleteOnClose, 
                                                           IntPtr.Zero), 
                                  true), 
               FileAccess.ReadWrite, 4096, true);


private static class NativeMethods
{
    [DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
    internal static extern IntPtr CreateFile(string name, uint accessMode, uint shareMode, IntPtr security, uint createMode, uint flags, IntPtr template);
}

For more information, see the MSDN documentation of CreateFile

why the downgrade ? – Frederik Gheysels Apr 05 '18 at 18:47 — Frederik Gheysels, Apr 05 '18 at 18:47

score -1 · Answer 3 · answered Sep 28 '11 at 07:09

-1

Ya, surely you can apply FileAttributes also by using File.SetAttributes Method

answered Sep 28 '11 at 07:09

Sai Kalyan Kumar Akshinthala

11,704
8
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I want to do that at the same time when FileStream create the file. Does FileStream method has any possibilities to set FileAttributes? – Tomas Sep 28 '11 at 07:13

score -1 · Answer 4 · answered Sep 28 '11 at 07:32

-1

Why do you need to do it all at once?

Just create the file (using File.Create or, if its a temporary file, use GetTempFileName.)
Set the attributes on the newly created file
Open the file using whatever method suits you

answered Sep 28 '11 at 07:32

Isak Savo

34,957
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create file with FileStream and apply FileAttributes

4 Answers4