Look at the overloads for the ctor to the "FileStream" class. you can specify a "Mode", which can be "Append".
-----Original Message----- From: Discussion of advanced .NET topics. [mailto:[EMAIL PROTECTED] Behalf Of Michael Sharpe Sent: Tuesday, February 05, 2008 11:20 AM To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM Subject: [ADVANCED-DOTNET] Join/Merge multiple files together Is it at all possible to combine 2 (or more) data files together without A) opening the data files to read and B) creating a "new" file out of them? For example, lets say I have one file that is 20MB and a second file that is 50MB. What I want to have happen is for the second data file to just be appended to the first but without Windows or the file system having to read any data. Basically I just want the FAT to take the 50MB file and attach it to the end of the 20MB file as a file fragment. I suppose this is more of a file join than an append. This is how it seems to work now: File 1 + File 2 = 1) Create File 3 2) Read contents of File 1 into File 3 3) Read contents of File 2 into File 3 This is how I want it to work: File 1 + File 2 = 1) File 1 is left alone except for the EOF position. 2) EOF position is removed from File 1 and is now an address pointer to the start of File 2 3) File 2 has any header information stripped from it 4) EOF becomes the end of File 2 5) File 1 is now a fragmented file since neither file is moved yet it contains the contents of File 1 and File 2 I know that there are some file systems available on other platforms that can do this joining of files without the overhead of having to build a file and read data into it. Is this at all possible in windows? I don't care if it used .NET, C++, C, etc. And I am aware that file fragmentation is not always a good thing but in this case, I am more than willing to accept file fragmentation for the speed especially when this needs to be done over many groups of files. If this needs to be done on let's saw 1,000 files that are 120GB total in size, I don't want the file system to rebuild 120GB of data that I already have but is just in different pieces. I want to just stick the pieces together. Thanks Mike =================================== This list is hosted by DevelopMentor. http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
