Modify uploadExtraData before upload in bootstrap-fileinput

Question

I'm using this bootstrap-file-input

I'm trying to change the uploadExtraData before uploading multiple files.

Here is my code

$("#input-id").fileinput({
        uploadUrl: '@Url.Action("DAR", "Upload")',
        allowedFileExtensions: ['jpg', 'png', 'gif', 'jpeg', 'bitmap', 'zip', 'docx', 'doc', 'pdf', 'pptx', 'xlsx', '7zip'],
        uploadExtraData: { Action: '', LAT: 0, LONG: 0, DateModified: '0', filename_text: '', SelectedTaskID: 0 }
    }).on('fileloaded', function (event, file, previewId, fileId, index, reader) {

    }).on('filepreupload', function (event, data, previewId, index, fileId) {

        var id = GetURLParameter('id');
        $.each(data.files, function (a, b) {
            var temp_name = b.size + "_" + b.name;
            if (temp_name == fileId) {

                data.extra.Action = 'during';
                data.extra.DateModified = b.lastModified;
                data.extra.filename_text = b.name;
                data.extra.SelectedTaskID = id;

                EXIF.getData(b, function () {
                    var rawLAT = EXIF.getTag(this, "GPSLatitude");
                    var rawLONG = EXIF.getTag(this, "GPSLongitude");

                    if (typeof rawLAT === 'string') {
                        var LAT = rawLAT.split(",");
                        var Long = rawLONG.split(",");

                        LAT[0] = LAT[0] ? LAT[0] : 0;
                        LAT[1] = LAT[1] ? LAT[1] : 0;
                        LAT[2] = LAT[2] ? LAT[2] : 0;

                        Long[0] = Long[0] ? Long[0] : 0;
                        Long[1] = Long[1] ? Long[1] : 0;
                        Long[2] = Long[2] ? Long[2] : 0;

                        data.extra.LAT = Number(LAT[0]) + (Number(LAT[1]) / Number(60.0)) + (Number(LAT[2]) / Number(3600.0));
                        data.extra.LONG = Number(Long[0]) + (Number(Long[1]) / Number(60.0)) + (Number(Long[2]) / Number(3600.0));
                    } else {
                        data.extra.LAT = 0;
                        data.extra.LONG = 0;
                    }
                });
            }
        });
    }).on('fileuploaded', function (e, params) {
        //img_arr.push(params.response.fileid);
    });

What happened is after I modified the uploadExtraData. The data will be applied on the next upload file request and not the current one.