JavaScript运行时错误：在初始化之前无法调用对话框上的方法;试图调用方法'关闭'“

Question

错误我运行下面的代码块：“0x800a139e - JavaScript运行时错误：在初始化之前无法调用对话框上的方法;尝试调用方法'close'”。 在声明中失败：$（this）.dialog（“close”）;

function DeleteReport(reportTitle, reportId) {
    reportIdToDelete = reportId;

    var buttons = [
        '<button id="btnYes" class="modalbtn" onclick="ConfirmDeleteReport();">Yes</button>',
        '<button id="btnNo" class="modalbtn" onclick="$.modal.close();">No</button>'
    ];

    ShowMessage('Are you sure you want to delete Report:' + reportTitle + '?<br>This action cannot be undone.', '', buttons);
}   

function ConfirmDeleteReport() {
    $.ajax({
        url: "/Report/DeleteReport",
        data: { reportId: reportIdToDelete },
        type: 'Get',
        success: function (data) {
            if (data.codeResult == 1) {
                $(this).dialog("close");
                window.location.reload(true);
            }
            else {
                ShowMessage(data["message"], "");
            }
        },
        error: function (request, status, error) {
            ShowMessage("Error while proccessing ..", "Error, Report Not Deleted");
        }
    });
}