Jquery ajax form submit that contains files

Unfortunately the jQuery serialize() method will not include input file elements. So your files are not going to be included in the serialized value.

What you should be doing is creating a FormData object, append the files to that. You need to append the form field values as well to this same FormData object. You may simply loop through all the input field and add it. Also, in the ajax call, you need to specify processData and contentType property values to false.

$(document).on('click', 'input[type="submit"].genericSubmit', function(e) {

    e.preventDefault(); // prevent the default submit behavior.

    var fdata = new FormData();

    $('input[name="fileUpload"]').each(function(a, b) {
        var fileInput = $('input[name="fileUpload"]')[a];
        if (fileInput.files.length > 0) {
            var file = fileInput.files[0];
            fdata.append("fileUpload", file);
        }
    });

    // You can update the jquery selector to use a css class if you want
    $("input[type="text"").each(function(x, y) {
        fdata.append($(y).attr("name"), $(y).val());
    });

    var frmUrl = $('.genericForm').attr('action');
    $.ajax({
        type: 'post',
        url: frmUrl,
        data: fdata,
        processData: false,
        contentType: false,
        success: function(e) {
            $('#target').html(e);
        }
    });

});