ไฟล์แถบความคืบหน้าในการอัพโหลดด้วย jQuery

ฉันพยายามใช้คุณสมบัติการอัปโหลดไฟล์ AJAX ในโครงการของฉัน ฉันใช้ jQuery สำหรับสิ่งนี้ รหัสของฉันส่งข้อมูลโดยใช้ AJAX ฉันต้องการใช้แถบความคืบหน้าในการอัปโหลดไฟล์ ฉันจะทำสิ่งนี้ได้อย่างไร มีวิธีการคำนวณจำนวนที่อัพโหลดไปแล้วหรือไม่เพื่อให้ฉันสามารถคำนวณเปอร์เซ็นต์ที่อัปโหลดและสร้างแถบความคืบหน้าได้

หมายเหตุ:คำถามนี้เป็นคำถามที่เกี่ยวข้องกับปลั๊กอิน jQuery รูปแบบ หากคุณกำลังมองหาวิธีการแก้ปัญหา jQuery บริสุทธิ์เริ่มต้นที่นี่ ไม่มีโซลูชัน jQuery โดยรวมสำหรับเบราว์เซอร์ทั้งหมด ดังนั้นคุณต้องใช้ปลั๊กอิน ฉันใช้dropzone.jsซึ่งเป็นทางเลือกที่ง่ายสำหรับเบราว์เซอร์รุ่นเก่า ปลั๊กอินใดที่คุณต้องการขึ้นอยู่กับความต้องการของคุณ มีจำนวนมากที่ดีเมื่อเปรียบเทียบโพสต์ออกมี

จากตัวอย่าง :

jQuery:

$(function() {

    var bar = $('.bar');
    var percent = $('.percent');
    var status = $('#status');

    $('form').ajaxForm({
        beforeSend: function() {
            status.empty();
            var percentVal = '0%';
            bar.width(percentVal);
            percent.html(percentVal);
        },
        uploadProgress: function(event, position, total, percentComplete) {
            var percentVal = percentComplete + '%';
            bar.width(percentVal);
            percent.html(percentVal);
        },
        complete: function(xhr) {
            status.html(xhr.responseText);
        }
    });
}); 

HTML:

<form action="file-echo2.php" method="post" enctype="multipart/form-data">
    <input type="file" name="myfile"><br>
    <input type="submit" value="Upload File to Server">
</form>

<div class="progress">
    <div class="bar"></div >
    <div class="percent">0%</div >
</div>

<div id="status"></div>

คุณต้องจัดรูปแบบแถบความคืบหน้าด้วย css ...

ฉันทำสิ่งนี้ด้วย jQuery เท่านั้น:

$.ajax({
  xhr: function() {
    var xhr = new window.XMLHttpRequest();

    xhr.upload.addEventListener("progress", function(evt) {
      if (evt.lengthComputable) {
        var percentComplete = evt.loaded / evt.total;
        percentComplete = parseInt(percentComplete * 100);
        console.log(percentComplete);

        if (percentComplete === 100) {

        }

      }
    }, false);

    return xhr;
  },
  url: posturlfile,
  type: "POST",
  data: JSON.stringify(fileuploaddata),
  contentType: "application/json",
  dataType: "json",
  success: function(result) {
    console.log(result);
  }
});

ฉันใช้สิ่งต่อไปนี้ในโครงการของฉัน คุณสามารถลองได้เช่นกัน

ajax = new XMLHttpRequest();
ajax.onreadystatechange = function () {

    if (ajax.status) {

        if (ajax.status == 200 && (ajax.readyState == 4)){
            //To do tasks if any, when upload is completed
        }
    }
}
ajax.upload.addEventListener("progress", function (event) {

    var percent = (event.loaded / event.total) * 100;
    //**percent** variable can be used for modifying the length of your progress bar.
    console.log(percent);

});

ajax.open("POST", 'your file upload link', true);
ajax.send(formData);
//ajax.send is for uploading form data.

ลองดูนี่สิ: http://hayageek.com/docs/jquery-upload-file.php ฉันพบมันโดยบังเอิญบนเน็ต

หากคุณกำลังใช้ jQuery ในโครงการของคุณและไม่ต้องการที่จะใช้กลไกการอัปโหลดจากรอยขีดข่วนคุณสามารถใช้https://github.com/blueimp/jQuery-File-Upload

พวกเขามี API ที่ดีมากด้วยการเลือกไฟล์หลายไฟล์รองรับการลากและวางแถบความคืบหน้าการตรวจสอบและภาพตัวอย่างการสนับสนุนข้ามโดเมนการอัปโหลดไฟล์ที่มีขนาดใหญ่และยาวต่อเนื่อง และมีสคริปต์ตัวอย่างสำหรับหลายภาษาเซิร์ฟเวอร์ (โหนด, php, python และ go)

สาธิต url: https://blueimp.github.io/jQuery-File-Upload/

นี่คือการใช้ jquery ที่ดูสมบูรณ์ยิ่งขึ้น 1.11.x $ .ajax ()

<script type="text/javascript">
    function uploadProgressHandler(event) {
        $("#loaded_n_total").html("Uploaded " + event.loaded + " bytes of " + event.total);
        var percent = (event.loaded / event.total) * 100;
        var progress = Math.round(percent);
        $("#uploadProgressBar").html(progress + " percent na ang progress");
        $("#uploadProgressBar").css("width", progress + "%");
        $("#status").html(progress + "% uploaded... please wait");
    }

    function loadHandler(event) {
        $("#status").html(event.target.responseText);
        $("#uploadProgressBar").css("width", "0%");
    }

    function errorHandler(event) {
        $("#status").html("Upload Failed");
    }

    function abortHandler(event) {
        $("#status").html("Upload Aborted");
    }

    $("#uploadFile").click(function (event) {
        event.preventDefault();
        var file = $("#fileUpload")[0].files[0];
        var formData = new FormData();
        formData.append("file1", file);

        $.ajax({
            url: 'http://testarea.local/UploadWithProgressBar1/file_upload_parser.php',
            method: 'POST',
            type: 'POST',
            data: formData,
            contentType: false,
            processData: false,
            xhr: function () {
                var xhr = new window.XMLHttpRequest();
                xhr.upload.addEventListener("progress",
                    uploadProgressHandler,
                    false
                );
                xhr.addEventListener("load", loadHandler, false);
                xhr.addEventListener("error", errorHandler, false);
                xhr.addEventListener("abort", abortHandler, false);

                return xhr;
            }
        });
    });
</script>

นี่เป็นการแก้ไขปัญหาของฉัน

$.ajax({
  xhr: function() {
    var xhr = new window.XMLHttpRequest();

    xhr.upload.addEventListener("progress", function(evt) {
      if (evt.lengthComputable) {
        var percentComplete = evt.loaded / evt.total;
        percentComplete = parseInt(percentComplete * 100);
var $link = $('.'+ids);
          var $img = $link.find('i'); 
          $link.html('Uploading..('+percentComplete+'%)');
          $link.append($img);
      }
    }, false);

    return xhr;
  },
  url: posturlfile,
  type: "POST",
  data: JSON.stringify(fileuploaddata),
  contentType: "application/json",
  dataType: "json",
  success: function(result) {
    console.log(result);
  }
});

คำตอบของ Kathirนั้นยอดเยี่ยมในขณะที่เขาแก้ปัญหาด้วยเพียงแค่ jQuery ฉันแค่อยากจะเพิ่มเติมคำตอบของเขาให้ทำงานกับโค้ดของเขาด้วยแถบความคืบหน้า HTML ที่สวยงาม:

$.ajax({
xhr: function() {
var xhr = new window.XMLHttpRequest();

xhr.upload.addEventListener("progress", function(evt) {
  if (evt.lengthComputable) {
    var percentComplete = evt.loaded / evt.total;
    percentComplete = parseInt(percentComplete * 100);

    $('.progress-bar').width(percentComplete+'%');
    $('.progress-bar').html(percentComplete+'%');

  }
}, false);

return xhr;
},
url: posturlfile,
type: "POST",
data: JSON.stringify(fileuploaddata),
contentType: "application/json",
dataType: "json",
success: function(result) {
console.log(result);
}
});

นี่คือโค้ด HTML ของแถบความคืบหน้าฉันใช้ Bootstrap 3 สำหรับองค์ประกอบของแถบความคืบหน้า:

<div class="progress" style="display:none;">
<div class="progress-bar progress-bar-success progress-bar-striped 
active" role="progressbar"
aria-valuemin="0" aria-valuemax="100" style="width:0%">
0%
</div>
</div>

JavaScript:

<script>
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</script>
    <script type="text/javascript">
        $(document).ready(function () {
            $('#myform').on('change', '.wpcf7-file', function (e) {
                e.preventDefault();
                var myParent = $(this).parent();
                var filname= $('input[type=file]').val()

                if (filname) { 
                $(this).parent().find('#progress-div').show();          
                $('#myform').ajaxSubmit({
                    // target: '#progress-div123',/**********only for response************/
                    beforeSubmit: function () {
                        myParent.find('#progress-bar').width('0%');
                    },
                    uploadProgress: function (event, position, total, percentComplete) {
                        myParent.find('#progress-bar').width(percentComplete + '%');
                        myParent.find('#progress-bar').html('<div id="progress-status">' + percentComplete + ' %</div>')
                    },
                    success: function showResponse(responseText, statusText, xhr, $form) {

                        //myParent.find('#progress-div').hide(10000);
                    },
                    resetForm: false
                });

                }
                return false;
            });


           /***********Error msg if file not valid***************/
                $('input[type=file]').change(function () {
                var val = $(this).val().toLowerCase();
                var regex = new RegExp("(.*?)\.(pdf|txt|jpg|png|doc|docx|xlx|xls|xlsx|jpg|ppt|pptx|tif|tiff|\n\
                bmp|pcd|gif|bmp|zip|rar|odt|avi|ogg|m4a|mov|mp3|mp4|mpg|wav|wmv|stp|sldprt|sldasm|iges|igs|stl|x_t|step\n\
                |stp|prt|asm|idw|iam|ipt|dxf|dwg|pdf|slddrw|dwf)$");
                if (!(regex.test(val))) {
                    $(this).val('');
                    alert('Please select correct file format');
                }
                });
            /*********End*****************/

        });
</script>

รูปแบบ:

<style>
    body{width:610px;}
    #uploadForm {border-top:#F0F0F0 2px solid;background:#FAF8F8;padding:10px;}
    #uploadForm label {margin:2px; font-size:1em; font-weight:bold;}
    .demoInputBox{padding:5px; border:#F0F0F0 1px solid; border-radius:4px; background-color:#FFF;}
    #progress-bar {background-color: #12CC1A;height:20px;color: #FFFFFF;width:0%;-webkit-transition: width .3s;-moz-transition: width .3s;transition: width .3s;}
    .btnSubmit{background-color:#09f;border:0;padding:10px 40px;color:#FFF;border:#F0F0F0 1px solid; border-radius:4px;}
    #progress-div
    {
        border: 1px solid #0fa015;
        border-radius: 4px;
        margin: -35px 2px 7px 295px;
        padding: 5px 0;
        text-align: center;
        width: 277px;
    }

    #targetLayer{width:100%;text-align:center;}
</style>