一个简单的ajax上传 上传进度显示

本例用了jquery.form.js请到演示页面查看



CSS Code

<style>

form { display: block; margin: 20px auto; background: #eee; border-radius: 10px; padding: 15px }

#progress { position:relative; width:400px; border: 1px solid #ddd; padding: 1px; border-radius: 3px; }

#bar { background-color: #B4F5B4; width:0%; height:20px; border-radius: 3px; }

#percent { position:absolute; display:inline-block; top:3px; left:48%; }

</style>

XML/HTML Code

<form id="myForm" action="upload.php" method="post" enctype="multipart/form-data">

<input type="file" size="60" name="myfile">

<input type="submit" value="Ajax File Upload">

</form>

<div id="progress">

<div id="bar"></div>

<div id="percent">0%</div >

</div>

<div id="message"></div>

JavaScript Code

<script>

$(document).ready(function()

{

var options = {

beforeSend: function()

{

$("#progress").show();

//clear everything

$("#bar").width('0%');

$("#message").html("");

$("#percent").html("0%");

},

uploadProgress: function(event, position, total, percentComplete)

{

$("#bar").width(percentComplete+'%');

$("#percent").html(percentComplete+'%');

},

success: function()

{

$("#bar").width('100%');

$("#percent").html('100%');

},

complete: function(response)

{

$("#message").html("<font color='green'>"+response.responseText+"</font>");

},

error: function()

{

$("#message").html("<font color='red'> ERROR: unable to upload files</font>");

}

};

$("#myForm").ajaxForm(options);

});

</script>

upload.php

PHP Code

<?php

$output_dir = "../upload/";

if(isset($_FILES["myfile"]))

{

//Filter the file types , if you want.

if ($_FILES["myfile"]["error"] > 0)

{

echo "Error: " . $_FILES["file"]["error"] . "<br>";

}

else

{

//move the uploaded file to uploads folder;

move_uploaded_file($_FILES["myfile"]["tmp_name"],$output_dir. $_FILES["myfile"]["name"]);

echo "Uploaded File :".$_FILES["myfile"]["name"];

}

}

?>