Javascript承诺我做错了什么

Question

我正在使用javascript Promise，但仍然会在ajax之前执行捕获仍然是我做错了什么？

这是我的代码

$(document).on("click", "#btn-group-agent-upload", function () {

    var file = $("#group-agent-file").val();
    var file = $("#group-agent-file").prop("files")[0];
    var reader = new FileReader();

    reader.readAsText(file, 'UTF-8');

    reader.onload = Insert_Bulk_Agent;



});

这是函数

function Insert_Bulk_Agent(event) {

var result = event.target.result;
var data = $.csv.toObjects(result);
var length = data.length;
var count = 0;
var arrayCollection = [];

new Promise((resolve, reject) => {
    if (length > 0) {

    $.each(data, function (key, val) {

        if(val.AgentStatus == "" || val.BirthDate == "" || val.CSP == "" || val.Classification == "" || val.ContactNumber == "" ||
            val.EmailAddress == "" || val.FirstName == "" || val.LastName == "" || val.MiddleName == "" || val.LiveDate == "") {
            $.ajax({
                success: function () {
                    //console.log('ok');
                    //var tbody = $("#error-list").find("tbody");
                    //$(tbody).append("<tr><td>" + val.MiddleName + "</td><td>" + val.LastName + "</tr>");
                    arrayCollection.push(val);
                    console.log('test');
                }
            });
        } else {

            $.ajax({
                xhr: function () {
                    var xhr = $.ajaxSettings.xhr();
                    xhr.upload.onprogress = function (evt) {
                        count = count + 1;
                        var percentageCompleted = count / length * 100;
                        updateUploadPercentage(parseInt(percentageCompleted));

                    };
                    return xhr;
                },
                type: "POST",
                url: "IROA_StoredProcedures.asmx/Insert_Bulk_Agent",
                data: JSON.stringify(val),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function () {


                },
                error: function (XMLHttpRequest) {
                    alert("error in Insert_Bulk_AgentInfo()");
                    console.log(XMLHttpRequest);
                }

            });

        }

    });
    }
    else {

        alert("The selected file is empty");

    }
    resolve();
}).catch(() => {
    console.log(arrayCollection[0]);
})


}

arrayCollection[0]返回undefined