file-attributes

I've got a simple WCF service that lets clients/consumers upload image, audio or video files to it. After the upload, the service is supposed to analyze the file and somehow retrieve the following attributes: Image: width, height, date taken, program used Audio: runtime, artist, album, genre, bitrate, publication year Video: runtime, width, height, frames/sec, video bitrate, audio bitrate Apparently Windows can get and display these attributes pretty easily, but how do I do it in C#? Khepri Courtesty of this thread. I've verified this gets all file attributes including the extended attributes.

I would like to get milliseconds from creation time of file attribute When I get file attribute, I use NSDateFormatter to convert file creation time (NSDate) to NSString. [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss:SS: A"]; ss --> seconds SS --> should be millisecond A --> milliseconds of the date I get 00 for SS and get 54487000 for A. I notice that the last three digits are always zero for NSDate come from file attribute of any files. But when I use the same formatter with the NSDate come from [NSDate date], the last three digits are not zero for A, and SS digit is not always zero.

Given a file on a webserver (e.g., http://foo.com/bar.zip -> only accessible through HTTP), is there any way to get the date attributes (e.g., date [created, modified]) without downloading the entire archive in the first place? Right now, I download the archive and read the attributes programmatically. Trouble is that the archive is dozens of MiB so it seems like a waste of resources to download the entire thing and end up reading off just a couple of bytes of information. I realize that bandwidth is practically free, but I don't like to be wasteful in any case. Try to read Last-Modified from

I'm writing a batch file and I need to know if a file is read only. How can I do that ? I know how to get them using the %~a modifier but I don't know what to do with this output. It gives something like -ra------. How can I parse this in batch file ? Something like this should work: @echo OFF SETLOCAL enableextensions enabledelayedexpansion set INPUT=test* for %%F in (%INPUT%) do ( set ATTRIBS=%%~aF set CURR_FILE=%%~nxF set READ_ATTRIB=!ATTRIBS:~1,1! @echo File: !CURR_FILE! @echo Attributes: !ATTRIBS! @echo Read attribute set to: !READ_ATTRIB! if !READ_ATTRIB!==- ( @echo !CURR_FILE! is read

If File.SetAttributes("C:\\myFile.txt", FileAttributes.ReadOnly); sets a file as read only, how do I set it back to read/write if I need to? I suspect it would be FileAttributes.Normal however will this change any other properties of the file? There isn't an awfully descriptive note on the MSDN site... The file is normal and has no other attributes set. This attribute is valid only if used alone. Thanks To remove just the ReadOnly attribute, you'd do something like this: File.SetAttributes("C:\\myfile.txt", File.GetAttributes("C:\\myfile.txt") & ~FileAttributes.ReadOnly); This will remove the