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How can i read a *.txt file in javascript

Posted on 2009-04-01
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Last Modified: 2012-05-06
i want to read some javascript inputs from a text file for my HTML file.
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Question by:renjitkumar
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8 Comments
 
LVL 20

Expert Comment

by:Gawai
ID: 24038527
0
 
LVL 15

Assisted Solution

by:Tomarse111
Tomarse111 earned 500 total points
ID: 24038655
Without any additional addons, this can only be done through AJAX. Please see below for an example ... where the test.txt is in the same dir as the file you're working on.
<html>
<head>
<script>
function submitForm()
{ 
    var xhr; 
    try {  xhr = new ActiveXObject('Msxml2.XMLHTTP');   }
    catch (e) 
    {
        try {   xhr = new ActiveXObject('Microsoft.XMLHTTP');    }
        catch (e2) 
        {
          try {  xhr = new XMLHttpRequest();     }
          catch (e3) {  xhr = false;   }
        }
     }
  
    xhr.onreadystatechange  = function()
    { 
	
         if(xhr.readyState==4)
         {
              	if(xhr.status  == 200){ 
                  document.write("Received:"  + xhr.responseText); 
				  return false;
				}
         }
    }; 
 
   xhr.open('GET', "test.txt",  true); 
   xhr.send(null); 
} 
</script>
</head>
                 
<body>
    <FORM method="POST" name="ajax" action="">                  
         <INPUT type="BUTTON" value="Submit"  ONCLICK="submitForm()">
        
    </FORM>
 </body>
</html>

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Author Comment

by:renjitkumar
ID: 24047985
i tried this option. but i have proble to refer the file path. because will available in desktop only not in HTML section.
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Accepted Solution

by:
renjitkumar earned 0 total points
ID: 24049578
i foud the solution myself; below is the source code of my query

<html>
<head>
<script language="JavaScript" type="text/javascript">
var text;

function fetchText(txtFile) {
var d = document;
var txtFrame = d.getElementById( 'textReader');
txtFrame.src = txtFile;
setTimeout('text = getContent();', 500);
}

function getContent() {
var d = document;
var txtFrame = d.getElementById( 'textReader');
var text = '';
if (txtFrame.contentDocument) {
var d = txtFrame.contentDocument;
text = d.getElementsByTagName( 'BODY')[ 0].innerHTML;

}
else if (txtFrame.contentWindow) {
var w = txtFrame.contentWindow;
text = w.document.body.innerHTML;

}
return text;
}

function doTest(txtFile, searchFor) {
fetchText(txtFile);
setTimeout("alert(-1 != text.indexOf('" + searchFor + "'))", 750);
}
</script>
</head>
<body>
<iframe id="textReader" style="display: none;" ></iframe>
<form>
<input type="button" value="search test 1 - will pass" onclick="doTest('C:/test.txt', 'HTML page')" />
</form>
</body>
</html>
0
 
LVL 20

Expert Comment

by:Gawai
ID: 24051114
go ahead for that, next time when you will ask any question, experts will think twice before they post their solution, i guess we have given you proper direction for the solution. Enjoy !
0
 
LVL 20

Expert Comment

by:Gawai
ID: 24074464
did u know u can split the points ? Tomarse111 deserve as well
0

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