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Reading from a txt file to JavaScript -html

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Old June 28th, 2007, 01:23 PM
victoria++   victoria++ is offline
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Reading from a txt file to JavaScript -html
Hi, I am trying to read from a txt file, line by line and added to an array which then will be seeded with random numbers to use random lines to show on html-js file. I have the random function (number creator) and the array. My issue is reading from a txt file line by line and loading into an array (all of this using JS) thanks.
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Old June 28th, 2007, 02:33 PM
draelon   draelon is offline
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First off, this can only be done if the javascript is being served from the same computer that has the txt file. This has to do with the javascript security model which prevents access to files.

That being said, here's a function:
javascript Code:
Original - javascript Code
 
// =====================================================================
//  array_file_read - convert a file to an array
// =====================================================================
function array_file_read( inPath )
{
  var fso, FILE;
  var ForReading = 1;
  $contents = new Array();
 
  fso = new ActiveXObject("Scripting.FileSystemObject");
 
  FILE = fso.OpenTextFile( inPath, ForReading, true );
  while( ! FILE.AtEndOfStream )
  {
  $line = FILE.ReadLine();
  if( $line.indexOf( '#' ) != 0 )
  {
  $contents[ $contents.length ] = $line;
  }
  }
  FILE.Close();
 
  return $contents;
}



I should note that this function will interpret the # character at the beginning of a string as a commented line and will skip that line.
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Old June 28th, 2007, 02:36 PM
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I searched for the same and found this. May be this would be helpful. The URL to the same is http://www.javascripter.net/faq/reading2.htm
The function below will read the file and set the value of the textarea to the file content.
javascript Code:
Original - javascript Code
var fileContent='';
var theLocation='';
 
function readFileViaApplet(n) {
 document.f1.t1.value='Reading in progress...';
 document.ReadURL.readFile(theLocation);
 setTimeout("showFileContent()",100);
}
 
function showFileContent() {
 if (document.ReadURL.finished==0) {
  setTimeout("showFileContent()",100);
  return;
 }
 fileContent=document.ReadURL.fileContent;
 document.form1.textarea1.value=fileContent;
}


Quote:
Originally Posted by victoria++
Hi, I am trying to read from a txt file, line by line and added to an array which then will be seeded with random numbers to use random lines to show on html-js file. I have the random function (number creator) and the array. My issue is reading from a txt file line by line and loading into an array (all of this using JS) thanks.