如果您序列化的形式，那么你可以添加额外的值，它与 .PARAM（）功能

If you serializing the form, then you can add additional values to it with the .param() function

var data = $("#RentForm").serialize() + '&' + $.param({ 'aracid': AracID }, true);

$.ajax({
    type: "POST",
    url: '@Url.Action("Save","AracKirala")',
    data: data,
    ....