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Thread: Parsing specific data out of a CSV file

  1. #1
    Join Date
    Jun 2010
    Posts
    4

    Parsing specific data out of a CSV file

    Hi, I'm trying to write a little Javascript that would parse a CSV file that contains a name and date, and only display the name if the date matches today. Here's some example data:

    Name, Date
    Joe, 6/10/2010
    Jane, 7/11/2010

    If today were 6/10/2010, the output of the script would just be "Joe"

    Can anybody help? Thanks!

  2. #2
    Join Date
    Apr 2003
    Location
    Netherlands
    Posts
    21,654
    Code:
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
        "http://www.w3.org/TR/html4/strict.dtd">
    <html lang="en">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title></title>
    
    <script type="text/javascript">
    function readCSV(){
    // http://www.tizag.com/ajaxTutorial/
    var ajaxRequest;
    try {
        // Opera 8.0+, Firefox, Safari
        ajaxRequest = new XMLHttpRequest();
        } 
    catch (e){
        // Internet Explorer Browsers
        try {
            ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } 
        catch (e) {
            try {
                ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } 
            catch (e){
                // Something went wrong
                alert("Your browser broke!");
                return false;
                }
            }
        }
    // Create a function that will receive data sent from the server
    ajaxRequest.onreadystatechange = function(){
        if(ajaxRequest.readyState == 4) {
            var temp = ajaxRequest.responseText.split('\n');
            for(var i=1; i<temp.length; i++) {
                if(temp[i].indexOf(document.form1.date.value)!=-1) {
                    var bday = temp[i].split(',');
                    alert(bday[0]);
                    }
                }
            }
        }
    ajaxRequest.open("GET", "data.csv", true); // csv file
    ajaxRequest.send(null); 
    }
    </script>
    
    <style type="text/css">
    * {margin:0;padding:0;}
    </style>
    
    </head>
    <body>
    <form name="form1">
    <input type="text" name="date" value="6/10/2010">
    <button type="button" onclick="readCSV();">get name</button>
    </form>
    </body>
    </html>
    At least 98% of internet users' DNA is identical to that of chimpanzees

  3. #3
    Join Date
    Jun 2010
    Posts
    4

    one more question

    Appreciate your help, but I have one more issue. I've got an external data file in this format

    Name,Date \n
    George,6/15/2010 \n
    George,6/15/2010 \n
    George,6/15/2010 \n
    George,6/15/2010 \n
    Smith,6/11/2010 \n

    And here's the code

    Code:
    <html>
    <head>
    <title>CSV &amp; Date parser</title>
    <script type="text/javascript">
    // From: http://codingforums.com/showthread.php?t=198171
    
    
    function checkCSVdate() {
    // ckDate = document.getElementById('dinfo').value;
      
    var currentTime = new Date()
    var month = currentTime.getMonth() + 1
    var day = currentTime.getDate()
    var year = currentTime.getFullYear()
    
    ckDate = (month + "/" + day + "/" + year);
    
    var str = '';
    fso  = new ActiveXObject("Scripting.FileSystemObject"); 
    fin  = fso.OpenTextFile("names2.csv", 1, false, 0);
    var line = fin.ReadAll();
      var tmp = line.split('\n');
      for (var i=0; i<tmp.length; i++) {
        temp = tmp[i].split(',');
        if (ckDate == temp[1]) { str += tmp[i]; }
      }
      if (str == '') { document.getElementById('mtchDiv').innerHTML = 'No matches found'; }
                else { document.getElementById('mtchDiv').innerHTML = str; }
    }
    
    onload = function() {
    
        checkCSVdate();
    
    }
    
    </script>
    </head>
    <body>
    <div id="mtchDiv"></div>
    </body>
    </html>
    Since the data file has a line with 6/15/2010, it should return a name, right? It returns "No Matches Found".

  4. #4
    Join Date
    Apr 2003
    Location
    Netherlands
    Posts
    21,654
    Remove white space
    Code:
    if (ckDate == temp[1].replace(/\s/g,'')) {str += tmp[i]; }
    At least 98% of internet users' DNA is identical to that of chimpanzees

  5. #5
    Join Date
    Jun 2010
    Posts
    4

    didn't work

    Appreciate your help, but that didn't seem to work. Any other ideas?

  6. #6
    Join Date
    Apr 2003
    Location
    Netherlands
    Posts
    21,654
    It works using the Ajax loaded I gave. Your script only works in older IE browsers which I don't have access to at the moment.
    Code:
    function readCSV(){
    // http://www.tizag.com/ajaxTutorial/
    var currentTime = new Date()
    var month = currentTime.getMonth() + 1
    var day = currentTime.getDate()
    var year = currentTime.getFullYear()
    
    ckDate = (month + "/" + day + "/" + year);
    
    var str = '';
    
    var ajaxRequest;
    try {
        // Opera 8.0+, Firefox, Safari
        ajaxRequest = new XMLHttpRequest();
        } 
    catch (e){
        // Internet Explorer Browsers
        try {
            ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } 
        catch (e) {
            try {
                ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } 
            catch (e){
                // Something went wrong
                alert("Your browser broke!");
                return false;
                }
            }
        }
    // Create a function that will receive data sent from the server
    ajaxRequest.onreadystatechange = function(){
        if(ajaxRequest.readyState == 4) {
            var tmp = ajaxRequest.responseText.split('\n');
      for (var i=0; i<tmp.length; i++) {
        temp = tmp[i].split(',');
        if (ckDate == temp[1].replace(/\s/g,'')) {str += tmp[i]; }
      }
      if (str == '') { document.getElementById('mtchDiv').innerHTML = 'No matches found'; }
                else { document.getElementById('mtchDiv').innerHTML = str; }
            }
        }
    ajaxRequest.open("GET", "names2.csv", true); // csv file
    ajaxRequest.send(null); 
    }
    Last edited by Fang; 06-15-2010 at 03:01 PM.
    At least 98% of internet users' DNA is identical to that of chimpanzees

  7. #7
    Join Date
    Jun 2010
    Posts
    4
    The modified ajax script doesn't seem to work either on my server. Any ideas? Does it work on your machine?

  8. #8
    Join Date
    Apr 2003
    Location
    Netherlands
    Posts
    21,654
    Yes. Have you cleared the cache and updated the csv file to include to-days date?
    If it still does not work for you then upload the csv file to the forum.
    At least 98% of internet users' DNA is identical to that of chimpanzees

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