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upload a csv file to a textarea purely using javascript

Posted on 2011-03-01
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Last Modified: 2012-05-11
Hello,  

I am looking for an example on how to upload a csv file into a html textarea (just dump the whole csv into the textarea) in html using javascript ONLY.

I know it's very easy to do going to the php/jsp etc..but i am looking for a solution that works purely on the client side html/javascript without any serverside connection.

Basically a *.html file with a texarea, then user select the csv file from their local drive via browse button, and the content is displayed in the textarea.

Thank you
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Question by:gagaliya
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Expert Comment

by:nepaluz
ID: 35012498
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Expert Comment

by:leakim971
ID: 35012836
Check this :


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script src="http://code.jquery.com/jquery-1.5.min.js" language="javascript" type="text/javascript"></script>
<script language="javascript">
	$(document).ready(function() {
		$("#myButtonId").click(function() {
			$.get("/path/to/filename.csv", function(data) {
				$("#myTextareaId").val( data );
			});
		});
	});
</script>
</head>
<body>
<input type="button" id="myButtonId" value="load csv" />
<br />
<textarea cols="24" rows="20"></textarea>
</body>
</html>

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Expert Comment

by:leakim971
ID: 35012887
correction line 20 :
<textarea cols="24" rows="20" id="myTextareaId"></textarea>

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script src="http://code.jquery.com/jquery-1.5.min.js" language="javascript" type="text/javascript"></script>
<script language="javascript">
	$(document).ready(function() {
		$("#myButtonId").click(function() {
			$.get( $("#filename").val(), function(data) {
				$("#myTextareaId").val( data );
			});
		});
	});
</script>
</head>
<body>
<input type="text" value="/path/to/filename.csv" id="filename" /><input type="button" id="myButtonId" value="load csv" />
<br />
<textarea cols="24" rows="20" id="myTextareaId"></textarea>
</body>
</html>

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Author Comment

by:gagaliya
ID: 35028883
hi leakim971,

i put this into a test html and tried it, but nothing happens when i click on the "load csv" button.  The only thing i changed is the path to the file to "c:\test.csv"

any ideas?

thank you

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script src="http://code.jquery.com/jquery-1.5.min.js" language="javascript" type="text/javascript"></script>
<script language="javascript">
	$(document).ready(function() {
		$("#myButtonId").click(function() {
			$.get( $("#filename").val(), function(data) {
				$("#myTextareaId").val( data );
			});
		});
	});
</script>
</head>
<body>
<input type="text" value="c:\test.csv" id="filename" /><input type="button" id="myButtonId" value="load csv" />
<br />
<textarea cols="24" rows="20" id="myTextareaId"></textarea>
</body>
</html> 

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0
 
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Expert Comment

by:leakim971
ID: 35029099
Yes of course, you can't use something like that : c:\test.csv
There's no valid (safe, cross-browser and so on...) solution to read a file directly by its file path until you put the file in the folder of your web server
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Author Comment

by:gagaliya
ID: 35029653
Sorry i dont understand, there is no server here. It's just a static html page with a reference to a javascript js. I open the html in my local internet explorer, it wont just goto the specified path, pick up the file, and dump it in the textarea?   sort like the behavior of <input type="file">, the javascript part is to read the file and dump it to the textarea.

thanks
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LVL 82

Expert Comment

by:leakim971
ID: 35029679
Sorry, forget my comments. I think it's a good to close this question without award points and open a new one.
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Accepted Solution

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gagaliya earned 0 total points
ID: 35073000
To answer my own question, below is how to read a file and dump the content into a textarea using purely javascript without any serverside script.

Mod, please close this question.

<body>
<input type="file" name="findfile" id="findfile" size="30">
<input type="button" value="uploadfile" id="uploadfile" onClick="readLocalFile();" >

 <textarea  name="sometextarea" id="sometextarea"  class="formText" ></textarea>

<SCRIPT Language="JavaScript">
    function readLocalFile()
    {
       var location = document.getElementById("findfile").value;

       if ( location == null || location=="")
       {
           alert("Please specify a file to upload first");
           return;
       }

	   var fso = new ActiveXObject("Scripting.FileSystemObject");

	   var tempFile = fso.OpenTextFile(location, 1);

	   var line = ""

	   while(!tempFile.AtEndOfStream)
	   {
	      line+=tempFile.ReadLine();
	      line+="\n";
	   }

	   document.getElementById("sometextarea").value=line;
    }
</SCRIPT>
</body>

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Expert Comment

by:leakim971
ID: 35073068
Very good! congrats @gagaliya and, again, sorry for the troubles.
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Author Closing Comment

by:gagaliya
ID: 35120687
reason: answered my own question
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Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

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