c# - How windows calculate file dimension? -


i calculate binary size of file function:

 public static int binarysize(string path)         {             filestream fs = new filestream(path, filemode.open);             int hexin;             string ret = "";             (int = 0; (hexin = fs.readbyte()) != -1; i++)             {                 ret += convert.tostring(hexin, 2);              }             fs.close();             return ret.length;         }

an example of problem when calculate dimension of simple black png image (10x10 pixels) myimage

with function find 640 bits => 80 bytes, windows file dimension 136 byte. why difference of 56 bytes? security, permissions or private information windows attach every file?

convert.tostring(hexin,2) not return 8 characters, trims leading zeroes, if hexin 4, returns 100, not 00000100.

you might want change convert.tostring(hexin,2).padleft(8, '0');. you'd want use stringbuilder instead of string ret variable.

by way, reading file determine size bit wasteful. better use fileinfo class file information.


Comments

Post a Comment

Popular posts from this blog

How to group boxplot outliers in gnuplot -

i have large set of data points. try plot them boxplot, of outliers exact same value , represented on line beside each other. found how set horizontal distance between outliers in gnuplot boxplot , doesn't much, apparently not possible. is possible group outliers together, print 1 point , print number in brackets beside indicate how many points there are? think make more readable in graph. for information, have 3 boxplots 1 x value , times 6 in 1 graph. using gnuplot 5 , played around pointsize, doesn't reduce distance anymore. hope can help! edit: set terminal pdf set output 'dat.pdf' file0 = 'dat1.dat' file1 = 'dat2.dat' file2 = 'dat3.dat' set pointsize 0.2 set notitle set xlabel 'x' set ylabel 'y' header = system('head -1 '.file0); n = words(header) set xtics ('' 1) set [i=1:n] xtics add (word(header, i) i) set style data boxplot plot file0 using (1-0.25):1:(0.2) boxplot lw 2 lc rgb '#8b0000...
Read more

cakephp - simple blog with croogo -

i not problem, made simple blog in croogo, problem is not adding or modifying or delete, because arabic language ?? function add in controller `public function admin_add() { $this->set('title_for_layout', __('add part')); if (!empty($this->request->data)) { $this->part->create(); if ($this->part->save($this->request->data)) { $this->session->setflash(__('the part has been saved'), 'default', array('class' => 'success')); $this->redirect(array('action' => 'index'));//, $this->part->id)); } else { $this->session->setflash(__('the part not saved. please, try again.'), 'default', array('class' => 'error')); } } }` => model `class part extends appmodel { public $name = 'part'; var $belongst...
Read more