Question

179

Writing data to a local text file with javascript

rated 0 times [ 183] [ 4] / answers: 1 / hits: 134250 / 11 Years ago, wed, april 17, 2013, 12:00:00

I have created a procedure to write content to a text file in my local machine.

<form id=addnew>

    <input type=text class=id>

    <input type=text class=content>

    <input type=submit value=Add>

</form>

<script>

    jQuery(function($) {

        $('#form_addjts').submit(function(){

            writeToFile({

                id: $(this).find('.id').val(), 

                content: $(this).find('.content').val()

            });

            return false;

        }); 

        function writeToFile(data){

            var fso = new ActiveXObject(Scripting.FileSystemObject);

            var fh = fso.OpenTextFile(D:\data.txt, 8);

            fh.WriteLine(data.id + ',' + data.content);

            fh.Close(); 

        } 

    }); 

</script>

This is working fine, and able to append my new data to the file.

But I want to update a particular row CONTENT based on the ID which I am passing.

I searched a lot, but could not find any.

How can update a particular row in the file based on the ID?

Note:- I am not using any server as such. I have a a html file (contains all the functionality) which I will be running on my local machine itself.

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taliac

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answered 11 Years ago leighamarleem · Accepted Answer

Our HTML:

<div id=addnew>

    <input type=text id=id>

    <input type=text id=content>

    <input type=button value=Add id=submit>

</div>



<div id=check>

    <input type=text id=input>

    <input type=button value=Search id=search>

</div>

JS (writing to the txt file):

function writeToFile(d1, d2){

    var fso = new ActiveXObject(Scripting.FileSystemObject);

    var fh = fso.OpenTextFile(data.txt, 8, false, 0);

    fh.WriteLine(d1 + ',' + d2);

    fh.Close();

}

var submit = document.getElementById(submit);

submit.onclick = function () {

    var id      = document.getElementById(id).value;

    var content = document.getElementById(content).value;

    writeToFile(id, content);

}

checking a particular row:

function readFile(){

    var fso = new ActiveXObject(Scripting.FileSystemObject);

    var fh = fso.OpenTextFile(data.txt, 1, false, 0);

    var lines = ;

    while (!fh.AtEndOfStream) {

        lines += fh.ReadLine() + r;

    }

    fh.Close();

    return lines;

}

var search = document.getElementById(search);

search.onclick = function () {

    var input   = document.getElementById(input).value;

    if (input != ) {

        var text    = readFile();

        var lines   = text.split(r);

        lines.pop();

        var result;

        for (var i = 0; i < lines.length; i++) {

            if (lines[i].match(new RegExp(input))) {

                result = Found:  + lines[i].split(,)[1];

            }

        }

        if (result) { alert(result); }

        else { alert(input +  not found!); }

    }

}

Put these inside a .hta file and run it. Tested on W7, IE11. It's working. Also if you want me to explain what's going on, say so.