How Do I Get The Data From Upload File In Java Script?

Question

0.00/5 (No votes)

See more:

I want to upload a file like .txt and i want to get the data from it and store in array and do some logoc in that by using java script
my snippet is

function m1(file,target) {
      var file = document.getElementById("fup1").value;

      var input= file.trim().replace(';', ',').split(',');
       var distinctArray = input.filter(function (val) {
           return input.indexOf(val) == -1;
           });
      target.value = distinctArray.join(',');
  }

and my controls are

JavaScript

<table>
   <tr>
   <td> <asp:FileUpload ID="fup1" runat="server" /></td>
   <td><asp:TextBox ID="txt1" runat="server" TextMode="MultiLine"></asp:TextBox></td>
   <td><input type="button" id="btn1" value="Submit" onclick='m1(<%=fup1.ClientID%>,<%=txt1.ClientID%>);return false;' /></td>
   </tr>
   </table>

Here i dont get any thing

please help me...thanks in advance

Posted 26-Jan-15 18:08pm

benzimen

Updated 26-Jan-15 20:20pm

v3

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sebastiaan Meijerink · Answer 1 · 2015-03-27T22:13:00

Reading the uploaded file isn't that simple unfortunatly.
The value of the file control will just be the file name.

You'll need access to the actual stream. In HTML4 the only way to do this was to post a form containing the file input to the server and let the server read the file.

Luckily HTML5 gives you way's to read the file through javascript. But it isn't as easy a you hoped. Please read;

http://www.html5rocks.com/en/tutorials/file/dndfiles/[^]

And I believe this blog post reads a textfile like you need;

http://stackoverflow.com/questions/3146483/html5-file-api-read-as-text-and-binary/3146509#3146509[^]

Good luck!