Changing File Permissions

I have a file that I want to copy to a different location. Sometimes the files will be marked as ReadOnly. I want to change the permission to not read only and then copy the file and change the permission back. Is there any way to handle this

Here is how I detect the attribute:

string file = @"C:\File.jpg";

FileInfo info = new FileInfo( file );

if( (info.Attributes & FileAttributes.ReadOnly) != 0 )

Console.WriteLine( "Read Only" );

else

Console.WriteLine( "Nope" );

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Changing File Permissions

lukeliu
I don't have .IsReadOnly as a method. Is this a .NET 2.0 change
Kajal Sinha
Sorry. It is.

But you can make it like this:

info.Attributes = info.Attributes | FileAttributes.ReadOnly; // ReadOnly
info.Attributes = (info.Attributes | FileAttributes.ReadOnly) ^ FileAttributes.ReadOnly; // not ReadOnly

Markku
Syed Junaid
Something like this:

FileInfo sourceInfo = new FileInfo("source.name");
Boolean readOnly = sourceInfo.IsReadOnly;
sourceInfo.IsReadOnly = false;
FileInfo targetInfo = sourceInfo.CopyTo("target.name");
tagetInfo.IsReadOnly = readOnly;

but you can copy (or move) file to other location even if it's ReadOnly. So you can do like this:

FileInfo info = new FileInfo("source.name");
info.CopyTo("target.name");
*ferhat
Little explain.

If you don't care other atributes (Hidden, Archve etc.) you can simply make this:

info.Attributes = FileAttributes.Normal;

info.Attributes = FileAttributes.ReadOnly;

But if you don't want to change other attributes you must do bitwise operations and

here little explain:

| (or) make this 101 | 010 = 111 or this 111 | 010 = 111

and

^ (xor) make this 111 ^ 010 = 101

So, when you are removing some attribute you must be sure, that the attribute is set before you can remove it.

Markku
Changing File Permissions

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Changing File Permissions

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Changing File Permissions

Changing File Permissions

lukeliu

Kajal Sinha

Syed Junaid

*ferhat