Preview an image before upload

Question

naju 0 Junior Poster in Training

16 Years Ago

pliz let me have an working example for it

javascript

13 Contributors
12 Replies
2K Views
6 Years Discussion Span
Latest Post 10 Years Ago Latest Post by ratna_1

hunkychop 3 Junior Poster in Training

16 Years Ago

are you using server side scripting for the upload?

Inny 1 Posting Whiz in Training

16 Years Ago

If its Client side....

<script type="text/javascript">
<!-- Begin
/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Abraham Joffe :: http://www.abrahamjoffe.com.au/ */

/***** CUSTOMIZE THESE VARIABLES *****/

  // width to resize large images to
var maxWidth=500;
  // height to resize large images to
var maxHeight=500;
  // valid file types
var fileTypes=["bmp","gif","png","jpg","jpeg"];
  // the id of the preview image tag
var outImage="previewField";
  // what to display when the image is not valid
var defaultPic="spacer.gif";

/***** DO NOT EDIT BELOW *****/

function preview(what){
  var source=what.value;
  var ext=source.substring(source.lastIndexOf(".")+1,source.length).toLowerCase();
  for (var i=0; i<fileTypes.length; i++) if (fileTypes[i]==ext) break;
  globalPic=new Image();
  if (i<fileTypes.length) globalPic.src=source;
  else {
    globalPic.src=defaultPic;
    alert("THAT IS NOT A VALID IMAGEnPlease load an image with an extention of one of the following:nn"+fileTypes.join(", "));
  }
  setTimeout("applyChanges()",200);
}
var globalPic;
function applyChanges(){
  var field=document.getElementById(outImage);
  var x=parseInt(globalPic.width);
  var y=parseInt(globalPic.height);
  if (x>maxWidth) {
    y*=maxWidth/x;
    x=maxWidth;
  }
  if (y>maxHeight) {
    x*=maxHeight/y;
    y=maxHeight;
  }
  field.style.display=(x<1 || y<1)?"none":"";
  field.src=globalPic.src;
  field.width=x;
  field.height=y;
}
// End -->
</script>







<center> Pre-veiw pic from your drive </center>
<body><div align="center" style="line-height: 1.9em;">

<br>
<input type="file" id="picField" onchange="preview(this)">
<br>
<img alt="Graphic will preview here" id="previewField" src="http://i14.photobucket.com/albums/a345/Instar/eye_search_e0.gif">

</div></body>

Troy III 272 Posting Pro

15 Years Ago

This doesnt seem to work on Firefox, chrome, and opera
:'(

Of course it doesn't - what did you expect?

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bluepicaso 0 Newbie Poster · Answer 1 · 2009-09-10T17:21:19+00:00

This doesnt seem to work on Firefox, chrome, and opera
:'(

rafaelksd 0 Newbie Poster · Answer 2 · 2010-04-27T23:45:25+00:00

Hola que tal, con una modificacion este codigo sirve tambien para FIREFOX, espero que a alguien le sirva. :)

<script type="text/javascript">
      <!-- Begin
      /* This script and many more are available free online at
      The JavaScript Source!! http://javascript.internet.com
      Created by: Abraham Joffe :: http://www.abrahamjoffe.com.au/ */
      /***** CUSTOMIZE THESE VARIABLES *****/
      // width to resize large images to
      var maxWidth=500;
      // height to resize large images to
      var maxHeight=500;
      // valid file types
      var fileTypes=["bmp","gif","png","jpg","jpeg"];
      // the id of the preview image tag
      var outImage="previewField";
      // what to display when the image is not valid
      var defaultPic="spacer.gif";
      /***** DO NOT EDIT BELOW *****/
      function preview(what){
      var source=what.value;
      var ext=source.substring(source.lastIndexOf(".")+1,source.length).toLowerCase();
      for (var i=0; i<fileTypes.length; i++){
	  if (fileTypes[i]==ext){
	  break;
	  }
	  }
      globalPic=new Image();
      if (i<fileTypes.length){
	  
	  //Obtenemos los datos de la imagen de firefox
	  try{
	  globalPic.src=what.files[0].getAsDataURL();
	  }catch(err){
	  globalPic.src=source;
	  }
	  }else {
      globalPic.src=defaultPic;
      alert("ESTA NO ES UNA IMAGEN VALIDA por favor escoge una imagen de tipo:nn"+fileTypes.join(", "));
      }
      setTimeout("applyChanges()",200);
      }
	  
      var globalPic;
      function applyChanges(){
      var field=document.getElementById(outImage);
      var x=parseInt(globalPic.width);
      var y=parseInt(globalPic.height);
      if (x>maxWidth) {
      y*=maxWidth/x;
      x=maxWidth;
      }
      if (y>maxHeight) {
      x*=maxHeight/y;
      y=maxHeight;
      }
      field.style.display=(x<1 || y<1)?"none":"";
      field.src=globalPic.src;
      field.width=x;
      field.height=y;
      }
      // End -->
      </script>
      <center> Pre-veiw pic from your drive </center>
      <body><div align="center" style="line-height: 1.9em;">
      <br>
      <input type="file" id="picField" onchange="preview(this)">
      <br>
      <img alt="Graphic will preview here" id="previewField" src="http://i14.photobucket.com/albums/a345/Instar/eye_search_e0.gif">
      </div></body>

Christian Harms 0 Newbie Poster · Answer 3 · 2010-04-28T12:56:31+00:00

Your example is an HTML5 Feature and will only work on Firefox2.5 and Chrome5. Hoping the function getAsDataURL() will come more popular in the next time!

Other solution with more compatibility are client side java applets or activeX ...

lyrics 0 Newbie Poster · Answer 4 · 2010-05-27T19:50:15+00:00

Yeah, it works when the file is saved with .html extension, but doesnt work when the file is converted and saved with .php extension. Please will like help when the file is saved as .php extension.

On the other side, please i will need help....When the image preview on the front-end, i will like to save the image with other form elements and stored in MySQL database. How can i achieve this. Thanks

prabhatraja445 0 Newbie Poster · Answer 5 · 2010-06-16T21:07:19+00:00

Thank you very much .
your solution works like a charm but it is not working in ie7
could you please give me the code to make it work in ie7

Mike_H 0 Light Poster · Answer 6 · 2010-07-06T04:36:33+00:00

rafaelksd,

Can you make this work with IE 7 and 8 also?

The post from March 20, 2008 does not work in IE 7?

Thanks,
Mike

Hola que tal, con una modificacion este codigo sirve tambien para FIREFOX, espero que a alguien le sirva. :)

<script type="text/javascript">
      <!-- Begin
      /* This script and many more are available free online at
      The JavaScript Source!! http://javascript.internet.com
      Created by: Abraham Joffe :: http://www.abrahamjoffe.com.au/ */
      /***** CUSTOMIZE THESE VARIABLES *****/
      // width to resize large images to
      var maxWidth=500;
      // height to resize large images to
      var maxHeight=500;
      // valid file types
      var fileTypes=["bmp","gif","png","jpg","jpeg"];
      // the id of the preview image tag
      var outImage="previewField";
      // what to display when the image is not valid
      var defaultPic="spacer.gif";
      /***** DO NOT EDIT BELOW *****/
      function preview(what){
      var source=what.value;
      var ext=source.substring(source.lastIndexOf(".")+1,source.length).toLowerCase();
      for (var i=0; i<fileTypes.length; i++){
	  if (fileTypes[i]==ext){
	  break;
	  }
	  }
      globalPic=new Image();
      if (i<fileTypes.length){
	  
	  //Obtenemos los datos de la imagen de firefox
	  try{
	  globalPic.src=what.files[0].getAsDataURL();
	  }catch(err){
	  globalPic.src=source;
	  }
	  }else {
      globalPic.src=defaultPic;
      alert("ESTA NO ES UNA IMAGEN VALIDA por favor escoge una imagen de tipo:nn"+fileTypes.join(", "));
      }
      setTimeout("applyChanges()",200);
      }
	  
      var globalPic;
      function applyChanges(){
      var field=document.getElementById(outImage);
      var x=parseInt(globalPic.width);
      var y=parseInt(globalPic.height);
      if (x>maxWidth) {
      y*=maxWidth/x;
      x=maxWidth;
      }
      if (y>maxHeight) {
      x*=maxHeight/y;
      y=maxHeight;
      }
      field.style.display=(x<1 || y<1)?"none":"";
      field.src=globalPic.src;
      field.width=x;
      field.height=y;
      }
      // End -->
      </script>
      <center> Pre-veiw pic from your drive </center>
      <body><div align="center" style="line-height: 1.9em;">
      <br>
      <input type="file" id="picField" onchange="preview(this)">
      <br>
      <img alt="Graphic will preview here" id="previewField" src="http://i14.photobucket.com/albums/a345/Instar/eye_search_e0.gif">
      </div></body>

vcarvalho 0 Newbie Poster · Answer 7 · 2011-05-31T02:11:51+00:00

anyone knows how to do this work for Chrome?

alguém sabe como fazer para isso funcionar no Chrome?

thx

saravani20 0 Newbie Poster · Answer 8 · 2012-03-14T16:00:16+00:00

Hi,

Here you go, ref http://saravani.wordpress.com/

Hope it work in all browsers.

<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();

reader.onload = function (e) {
$('#img_prev')
.attr('src', e.target.result)
.width(150)
.height(200);
};

reader.readAsDataURL(input.files[0]);
}
}
</script>

<meta charset=utf-8 />
<title>JS Bin</title>
<!--[if IE]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<style>
article, aside, figure, footer, header, hgroup,
menu, nav, section { display: block; }
</style>
</head>
<body>
<input type='file' onchange="readURL(this);" />
<img id="img_prev" src="#" alt="your image" />
</body>
</html>

Thanks,
Sarav

ratna_1 0 Newbie Poster · Answer 9 · 2014-09-08T11:02:56+00:00

@ saravani20

Your Post works like Charm.

Keep it up.

(googled for this like 100 pages, 'this is the best of the best')

Thank you.

I would also like to THANK-YOU "DANIWEB" for useful code providing for Programmenrs like me.