How to upload a file only once with blueimp file upload plugin?

Question

I'm using the bluimp jQuery-File-Upload-plugin . It's no problem to select some files and upload them, but when I want to upload another files without refreshing the page, the first ones are getting uploaded again. My question is how can I "unset" files after they are uploaded. Here is my sourcecode

Javascript:

$('#MappeFile').fileupload({
        dataType : 'json',
        autoUpload : false,
        maxNumberOfFiles : undefined,
        maxFileSize : 6000000,
        minFileSize : undefined,
        acceptFileTypes : /.+$/i,
        url : "/ajax/UploadFile.php",
        add : function(e, data) {
            $("#testUploadButton").on("click", function() {
                    $('#progress .bar').show();
                    if ($.browser.msie && parseInt($.browser.version, 10) < 10) {
                        $('#progress .bar').css({
                            "background" : "url(images/progressbar.gif) no-repeat",
                            "width" : "100%"
                        })
                    } else {
                        $('#progress .bar').css({
                            'background-color' : "#2694E8",
                            'width' : '0%'
                        });
                    }
                data.submit();
            })
        },
        change : function(e, data) {
            $.each(data.files, function(index, file) {
                console.info('Selected file: ' + file.name);
                filesCount++;
            });
        },
        drop: function(e, data) {
            $.each(data.files, function(index, file) {
                console.info('Selected file: ' + file.name);
                filesCount++;
            });
        },
        done : function(e, data) {
            $.each(data.result, function(index, file) {
                vOutput = "<tr>";
                vOutput += "<td>" + file + "</td>";
                vOutput += "<tr>";
                $("#MappeFileListe").append(vOutput);
                filesUploaded++;
                if (filesCount == filesUploaded) {
                    filesUploaded = 0;
                    filesCount=0;
                    $('#progress .bar').hide();
                }
            });
        },
        progressall : function(e, data) {
            var progress = parseInt(data.loaded / data.total * 100, 10);
            $('#progress .bar').css('width', progress + '%');
        }
    });

HTML:

<div id="KundeMappe">
    <form id="MappeFile">
        <input type="file" id="MappeFileSelect" name="files[]" data-url="ajax/UploadFile.php" multiple/>
        <div id="progress">
            <div class="bar" style="width: 0%;"></div>
        </div>
        <input type="button" class="neuButton" value="upload" id="testUploadButton"/>
    </form>
    <table id="MappeFileListe"></table>
</div>

Answer 1

The same problem when I faced, I resolved it by using one() in place of on(). The add function can be written as:

add : function(e, data) {
        $("#testUploadButton").one("click", function() {
                $('#progress .bar').show();
                if ($.browser.msie && parseInt($.browser.version, 10) < 10) {
                    $('#progress .bar').css({
                        "background" : "url(images/progressbar.gif) no-repeat",
                        "width" : "100%"
                    })
                } else {
                    $('#progress .bar').css({
                        'background-color' : "#2694E8",
                        'width' : '0%'
                    });
                }
            data.submit();
        })
    }

The .one() method is identical to .on(), except that the handler for a given element and event type is unbound after its first invocation.

Here is more about one(): https://api.jquery.com/one/

Answer 2

I had a similar problem where previously uploaded files were included in the next upload. You can try following solution below:

On Add Function just add "change" event of the file input element like below:

$('#YourFileUploadElementId').change(function(e) {
     data.files.splice(0); // Clear All Existing Files
});

Full Example Below:

$('#YourFileUploadElementId').fileupload({
    // Some options
    add: function (e, data) {
        $('#YourFileUploadElementId').change(function(e) {
          data.files.splice(0); // Clear All Existing Files
        });
    },
    // Other Events
 });

Note: Just change the YourFileUploadElementId to your file upload element id.

Here is the complete example on jsfiddle.net

http://jsfiddle.net/dustapplication/cjodz2ma/5/

Answer 3

I found the answer myself - It's enough to unbind the click event of the button after upload:

add : function(e, data) {
            $("#testUploadButton").on("click", function() {
                    $('#progress .bar').show();
                    if ($.browser.msie && parseInt($.browser.version, 10) < 10) {
                        $('#progress .bar').css({
                            "background" : "url(images/progressbar.gif) no-repeat",
                            "width" : "100%"
                        })
                    } else {
                        $('#progress .bar').css({
                            'background-color' : "#2694E8",
                            'width' : '0%'
                        });
                    }
                data.submit();
                $("#testUploadButton").off("click")
            })
        },