从数据库中，我正在获取选择菜单的元素。在这里，我可以简单地生成新的选择菜单以获取更多的成员元素。我需要像下面这样工作。一旦我选择了一个成员（假设为成员A ），它应该在下一个新的选择菜单中不可用（成员A ）。

这是我用来创建选择菜单的代码。

function appendMember(rowNumber) {
    debugger

    var subrowNumber = parseInt($("#itemmapWrapper" + rowNumber + "").attr("data-subrowNumber"));


    subrowNumber = isnaN(subrowNumber) ? 1 : subrowNumber + 1;

    var addNewItemDetailHtml = "<div class='col-lg-10 col-md-10 col-sm-10 col-xs-10 itemmapAllocationWrapper  custom-paaddingnone form-group' \
                               id='dvaddNewItemDetailSub" + subrowNumber + "' data-subrowNumber='" + subrowNumber + "'>";

    addNewItemDetailHtml += "<div class='col-lg-4 col-md-4 col-sm-4 col-xs-4 custom-paaddingnone'>\
                                <div class='col-lg-3 col-md-3 col-sm-3 col-xs-3 custom-paaddingnone text-center'>\
                                </div>\
                                <div class='col-lg-9 col-md-9 col-sm-9 col-xs-9 custom-paaddingnone'>\
                                    <div class='col-lg-12 col-md-12 col-sm-12 col-xs-12 custom-paaddingnone'>\
                                        <div class='col-lg-10 col-md-10 col-sm-10 col-xs-10 custom-paaddingnone'>\
                                            <select class='form-control' id ='memberid"+ rowNumber + subrowNumber + "' ></select>\
                                            <input type='hidden' id='objectsCounter' value='0'>\
                                        </div>\
                                    </div>\
                                </div>\
                             </div>";

    addNewItemDetailHtml += "<div class='col-lg-2 col-md-2 col-sm-2 col-xs-2 custom-paaddingnone'>\
                                <span class='glyphicon glyphicon-trash removeBtn' onclick = 'removeMemberDetail(this," + rowNumber + ")' ></span >\
                            </div>";

    addNewItemDetailHtml += "</div>";

    addNewItemDetailHtml += "</div>";



    $("#itemmapWrapper" + rowNumber + "").attr("data-subrowNumber",subrowNumber);
    $(".memberContainer").append(addNewItemDetailHtml);
    intialize_memberDropDown(rowNumber,subrowNumber);
}

这是用于从数据库获取成员元素的代码。

function intialize_memberDropDown(rowNumber,subrowNumber) {
    $.ajax({
        type: "GET",url: "/Member/GetallMember/",cache: false,success: function (data) {
            debugger
            var countryHTMLString = "<option value ='0'>Select Member</option>";
            if (data.isSucess) {
                $.each(data.data,function (index,item) {
                    countryHTMLString += "<option value ='" + item.memberid + "'>" + item.membername + "</option>";
                });
            }
            $("#memberid" + rowNumber + subrowNumber + "").html(countryHTMLString)
            getTotalTripPrice(rowNumber);
            getRoomPrice(rowNumber,subrowNumber);

            var objectCounter = document.getElementById('objectsCounter').value;
            objectCounter++;
            document.getElementById('objectsCounter').value = objectCounter
        },error: function (err) {
            debugger
        }
    });
}