Search Results

Search found 60836 results on 2434 pages for 'system io directory'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 237/2434 | < Previous Page | 233 234 235 236 237 238 239 240 241 242 243 244  | Next Page >

  • C# .Net file in use issue

    - by Dan
    I'm having an issue opening files that have recently been closed by the .Net framework. Basically, what happens is the following: -Read in an XML file using DataSet.ReadXml() -Make some changes to the data -Write out the XML file using DataSet.WriteXml() -Copy the XML file to a new location using File.Copy -FTP the file using a custom control This sequence can intermittently fail either after the WriteXML or the File.Copy with a file in use exception. I'm guessing it could be the Windows write cache not flushing right away. Can anyone confirm that this could be causing my issue? Any solutions to suggest? Thanks, Dan

    Read the article

  • According to MSDN ReadFile() Win32 function may incorrectly report read operation completion. When?

    - by Martin Dobšík
    The MSDN states in its description of ReadFile() function (http://msdn.microsoft.com/en-us/library/aa365467%28VS.85%29.aspx): “If hFile is opened with FILE_FLAG_OVERLAPPED, the lpOverlapped parameter must point to a valid and unique OVERLAPPED structure, otherwise the function can incorrectly report that the read operation is complete.” I have some applications that are violating the above recommendation and I would like to know the severity of the problem. I mean the program uses named pipe that has been created with FILE_FLAG_OVERLAPPED, but it reads from it using the following call: ReadFile(handle, &buf, n, &n_read, NULL); That means it passes NULL as the lpOverlapped parameter. That call should not work correctly in some circumstances according to documentation. I have spent a lot of time trying to reproduce the problem, but I was unable to! I always got all data in right place at right time. I was testing only Named Pipes though. Would anybody know when can I expect that ReadFile() will incorrectly return and report successful completion even the data are not yet in the buffer? What would have to happen in order to reproduce the problem? Does it happen with files, pipes, sockets, consoles, or other devices? Do I have to use particular version of OS? Or particular version of reading (like register the handle to I/O completion port)? Or particular synchronization of reading and writing processes/threads? Or when would that fail? It works for me :/ Please help! With regards Martin

    Read the article

  • compare two windows paths, one containing tilde, in python

    - by Steve Cooper
    I'm trying to use the TMP environment variable in a program. When I ask for tmp = os.path.expandvars("$TMP") I get C:\Users\STEVE~1.COO\AppData\Local\Temp Which contains the old-school, tilde form. A function I have no control over returns paths like C:\Users\steve.cooper\AppData\Local\Temp\file.txt My problem is this; I'd like to check if the file is in my temp drive, but I can't find a way to compare them. How do you tell if these two Windows directories; C:\Users\STEVE~1.COO\AppData\Local\Temp C:\Users\steve.cooper\AppData\Local\Temp are the same?

    Read the article

  • Core Data iPad/iPhone BLOBS vs File system for 20k PDFs

    - by jamone
    I'm designing an iPad/iPhone app using core data. The main focus of the app is sorting and viewing up to 20,000 PDFs They are ~200KB each. Typically its best to not store BLOBS in a DB, but for desktop systems I've typically seen it said that if the blobs are < 1 MB then its fine to use the DB. Any considerations I should take into count? If I store them in the file system can I store them all in one directory and not have performance issues (I won't need to ever get a directory list since I'd store each's path in the DB)? Should I divide them among a handful of directories? If so is there a good rule on # of files per dir?

    Read the article

  • C file read leaves garbage characters

    - by KJ
    Hi. I'm trying to read the contents of a file into my program but I keep occasionally getting garbage characters at the end of the buffers. I haven't been using C a lot (rather I've been using C++) but I assume it has something to do with streams. I don't really know what to do though. I'm using MinGW. Here is the code (this gives me garbage at the end of the second read): include include char* filetobuf(char *file) { FILE *fptr; long length; char *buf; fptr = fopen(file, "r"); /* Open file for reading */ if (!fptr) /* Return NULL on failure */ return NULL; fseek(fptr, 0, SEEK_END); /* Seek to the end of the file */ length = ftell(fptr); /* Find out how many bytes into the file we are */ buf = (char*)malloc(length+1); /* Allocate a buffer for the entire length of the file and a null terminator */ fseek(fptr, 0, SEEK_SET); /* Go back to the beginning of the file */ fread(buf, length, 1, fptr); /* Read the contents of the file in to the buffer */ fclose(fptr); /* Close the file */ buf[length] = 0; /* Null terminator */ return buf; /* Return the buffer */ } int main() { char* vs; char* fs; vs = filetobuf("testshader.vs"); fs = filetobuf("testshader.fs"); printf("%s\n\n\n%s", vs, fs); free(vs); free(fs); return 0; } The filetobuf function is from this example http://www.opengl.org/wiki/Tutorial2:_VAOs,_VBOs,_Vertex_and_Fragment_Shaders_%28C_/_SDL%29. It seems right to me though. So anyway, what's up with that?

    Read the article

  • Reading Binary file in C

    - by darkie15
    Hi All, I am having following issue with reading binary file in C. I have read the first 8 bytes of a binary file. Now I need to start reading from the 9th byte. Following is the code: fseek(inputFile, 2*sizeof(int), SEEK_SET); However, when I print the contents of the array where I store the retrieved values, it still shows me the first 8 bytes which is not what I need. Can anyone please help me out with this? Regards, darkie

    Read the article

  • C# double-quoted path name being escaped when read from file

    - by KrisTrip
    I am trying to read in a text input file that contains a list of filenames (one per line). However, I am running into an issue if the user double-quotes the path (because it has a space in it). For example, a normal input file might have: C:\test\test.tiff C:\test\anothertest.tiff C:\test\lasttest.tiff These get read in fine by my code ("C:\\test\\test.tiff" etc) However, if I have the following input file: "C:\test with spaces\test.tiff" "C:\test with spaces\anothertest.tiff" "C:\test with spaces\lasttest.tiff" These get read in double-quotes and all ("\"C:\\test with spaces\\test.tiff\"" etc). This becomes a problem when I try to open the files (I understandably get invalid character exceptions). My question is, how do I fix this? I want to allow users to input quoted strings and handle them correctly. My first impression was to just write a little method that strips off beginning or ending quotes, but I thought there might be a better way.

    Read the article

  • c#: how to read parts of a file? (DICOM)

    - by Xaisoft
    I would like to read a DICOM file in C#. I don't want to do anything fancy, I just for now would like to know how to read in the elements, but first I would actually like to know how to read the header to see if is a valid DICOM file. It consists of Binary Data Elements. The first 128 bytes are unused (set to zero), followed by the string 'DICM'. This is followed by header information, which is organized into groups. A sample DICOM header First 128 bytes: unused DICOM format. Followed by the characters 'D','I','C','M' Followed by extra header information such as: 0002,0000, File Meta Elements Groups Len: 132 0002,0001, File Meta Info Version: 256 0002,0010, Transfer Syntax UID: 1.2.840.10008.1.2.1. 0008,0000, Identifying Group Length: 152 0008,0060, Modality: MR 0008,0070, Manufacturer: MRIcro In the above example, the header is organized into groups. The group 0002 hex is the file meta information group which contains 3 elements: one defines the group length, one stores the file version and the their stores the transfer syntax. Questions How to I read the header file and verify if it is a DICOM file by checking for the 'D','I','C','M' characters after the 128 byte preamble? How do I continue to parse the file reading the other parts of the data?

    Read the article

  • Parse values from a text file in C

    - by Mohit Deshpande
    Say I have written to a text file in this format: key1/value1 key2/value2 akey/withavalue anotherkey/withanothervalue I have a linked list like: struct Node { char *key; char *value; struct Node *next; }; to hold the values. How would I read key1 and value1? I was thinking of putting line by line in a buffer and using strtok(buffer, '/'). Would that work? What other ways could work, maybe a bit faster or less prone to error? Please include a code sample if you can!

    Read the article

  • Replace text in folder names

    - by dannyb
    How can I replace the same text in folder names in linux? Say I have "Photos_Jun", "Photos_July", "Photos_Aug", etc. whats the simplest way I can rename them like "Photos Jun", "Photos July", etc (basically I want to replace the underscore with a space " ". I have about 200 of these folders. I was looking at solution: http://stackoverflow.com/questions/1836563/how-can-i-easily-bulk-rename-files-with-perl It looks like what im looking for however, I dont know how to make a regular expression to match folders that are alphanumeric followed by a "_". All files have non-numeric names, so I think [a-zA-Z] is the right way to start. perl -e 'foreach $f (glob("File\\ Name*")) { $nf = $f; $nf =~ s/(\d+)$/sprintf("%03d",$1)/e; print `mv \"$f\" \"$nf\"`;}' Thanks for any help!

    Read the article

  • Get PocketC File Handle Int?

    - by Nathan Campos
    I'm now taking a look at the PocketC powerful tool, but there is an fileopen function, that generates a integer called filehandle, that is used for most of the File I/O operations of PocketC, than I want to know how to discover the int filehandle from the function? Here is my example function that I'm using at my program: fileopen("\test.txt", 0, 0x00000000); Description of int filehandle: Integer used for file operations, used as a pointer to the fileopen instruction.

    Read the article

  • Browsing a Folder

    - by Md. Rashim Uddin
    browser.BrowseObject(PIDLFromPath, NativeMethods.SBSP_ABSOLUTE); It works great in explorer, and for the common dialog. However, when running Office XP, it goes nuts. The view on the screen is refreshed, and shows the contents of the new folder correctly. However, the Combo Box up the top of the dialog still references the original IShellFolder object where the Context menu was initiated. How should I change this IShellFiolder object in the Combo Box?

    Read the article

  • Parsing a file with hierarchical structure in Python

    - by Kevin Stargel
    I'm trying to parse the output from a tool into a data structure but I'm having some difficulty getting things right. The file looks like this: Fruits Apple Auxiliary Core Extras Banana Something Coconut Vegetables Eggplant Rutabaga You can see that top-level items are indented by one space, and items beneath that are indented by two spaces for each level. The items are also in alphabetical order. How do I turn the file into a Python list that's something like ["Fruits", "Fruits/Apple", "Fruits/Banana", ..., "Vegetables", "Vegetables/Eggplant", "Vegetables/Rutabaga"]?

    Read the article

  • read a binary file (python)

    - by beratch
    Hi, I cant read a file, and I dont understand why: f = open("test/test.pdf", "r") data = list(f.read()) print data Returns : [] I would like to open a PDF, and extract every bytes, and put it in a List. What's wrong with my code ? :( Thanks,

    Read the article

  • Perl 'system' failure messages

    - by mmccoo
    Say I have this perl "program" called simple.pl: #!/usr/bin/perl use xyz; # xyz is bogus and doesn't exist And I also have this "program", called simple2.pl: #!/usr/bin/perl system("simple.pl"); my $abc = `simple2.pl`; printf("abc %s\n", $abc); for both system and backtick, I get this message: Can't exec "simple.pl": No such file or directory at scripts/perl/simple2.pl line 7. Can't exec "simple2.pl": No such file or directory at scripts/perl/simple2.pl line 9. Not very useful for the user calling simple2.pl. Is there a way to get a more useful message?

    Read the article

  • Delete a line from a file in java

    - by dalton conley
    Ok, so I'm trying to delete lines from a text file with java. Currently the way I'm doing this, is I'm keep track of a line number and inputting an index. The index is the line I want deleted. So each time I read a new line of data I increment the line count. Now when I reach the line count that is the same index, I dont write the data to the temporary file. Now this works, but what if for example I'm working with huge files and I have to worry about memory restraints. How can I do this with.. file markers? For example.. place the file marker on the line I want to do delete. Then delete that line? Or is that just too much work?

    Read the article

  • read url in binary mode in java

    - by Andrew Zawok
    In java I need to read a binary file from a site and write it to a disk file. This example http://java.sun.com/docs/books/tutorial/networking/urls/readingURL.html could read webpages succesfully, but when I try to read a binary file from my localhost server and write it to a disk file the contents change, corrupting the binary file. Using fc I see that 0x90 is changed to 0x3F and other changes. How do I acess the binary files (read url and write to file) without java or anything else changing ANY characters, like doing any newline conversions or character conversions or anything else, simply reading input url and writing it out as a file.

    Read the article

  • WML And Downloads

    - by Nathan Campos
    I'm now playing with WML and WMLScript, but I'm doing a site that will have some content to download(some txt, doc, bmp, mpg, avi and jpg files), but some of my friends(that never developed in this language, just used the technology on the beginning) said that it's impossible. Then here are my questions: It's possible? How to do it? Remember that I'm using PHP combined with WML.

    Read the article

  • fwrite = unblocking ?

    - by John Michaels
    Since you can't be sure that what you write with fwrite has been written (god thats an awesome sentence) before you call fflush can i consider fwrite a nonblocking write?? And if not, why not and what are my alternatives?

    Read the article

  • Is it possible to change HANDLE that has been opened for synchronous I/O to be opened for asynchrono

    - by Martin Dobšík
    Dear all, Most of my daily programming work in Windows is nowadays around I/O operations of all kind (pipes, consoles, files, sockets, ...). I am well aware of different methods of reading and writing from/to different kinds of handles (Synchronous, asynchronous waiting for completion on events, waiting on file HANDLEs, I/O completion ports, and alertable I/O). We use many of those. For some of our applications it would be very useful to have only one way to treat all handles. I mean, the program may not know, what kind of handle it has received and we would like to use, let's say, I/O completion ports for all. So first I would ask: Let's assume I have a handle: HANDLE h; which has been received by my process for I/O from somewhere. Is there any easy and reliable way to find out what flags it has been created with? The main flag in question is FILE_FLAG_OVERLAPPED. The only way known to me so far, is to try to register such handle into I/O completion port (using CreateIoCompletionPort()). If that succeeds the handle has been created with FILE_FLAG_OVERLAPPED. But then only I/O completion port must be used, as the handle can not be unregistered from it without closing the HANDLE h itself. Providing there is an easy a way to determine presence of FILE_FLAG_OVERLAPPED, there would come my second question: Is there any way how to add such flag to already existing handle? That would make a handle that has been originally open for synchronous operations to be open for asynchronous. Would there be a way how to create opposite (remove the FILE_FLAG_OVERLAPPED to create synchronous handle from asynchronous)? I have not found any direct way after reading through MSDN and googling a lot. Would there be at least some trick that could do the same? Like re-creating the handle in same way using CreateFile() function or something similar? Something even partly documented or not documented at all? The main place where I would need this, is to determine the the way (or change the way) process should read/write from handles sent to it by third party applications. We can not control how third party products create their handles. Dear Windows gurus: help please! With regards Martin

    Read the article

  • need help passing multiple variables from foreach loop to test in switch case statement

    - by Brad
    $list_of_groups = array("FACULTY","STAFF"); foreach ($list_of_groups as $i => $group) { $user_in_group = $adldap->user_ingroup($username,$group); print "<h2>Group: ".$group." user in group? ".$user_in_group."</h2>"; // if 1, means yes } Need to print run the appropriate function based on what returns true. There are user's that are members of both FACULTY and STAFF groups, so I want to check for those users and display the appropriate content for them. So if the user is both faculty and staff, then display this, if they are only of staff, display that, same for faculty, might not make sense, but I will write out some code "in theory" that will help you understand what I am trying to do switch(Get group membership of user) { case "FACULTY": print "Faculty group member"; break; case "STAFF": print "Staff group member"; break; case "FACULTY and STAFF": print "Member of both faculty and staff"; break; } I am unsure on how it will check if they are members of both groups and run that thru the case statement to display the appropriate message. The foreach look currently runs thru every group the user belongs to, prints out the ones from the $list_of_groups and the number 1 to the right of it, signifying they belong to it. The problem I have is trying to use that information to run thru the case statement, I am unsure of how to go about that. This is what it prints out for the user currently passed thru the foreach loop: Group: FACULTY user in group? 1 Group: STAFF user in group? 1 Any help is appreciated.

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 233 234 235 236 237 238 239 240 241 242 243 244  | Next Page >