[HttpPost]
public JsonResult CheckStock(IEnumerablepvIdsCount> pvIds)
{
var resultList = new ListpvIdsCount>();
if (pvIds != null)
{
foreach (var pvIdsCount in pvIds)
{
var pvId = pvIdsCount.pvId;
var count = pvIdsCount.count;
var stock = _productService.GetProductVariantById(pvId).StockQuantity;
if (stock - count 0)
{
var pvIdC=new pvIdsCount();
pvIdC.pvId = pvId;
pvIdC.count = stock;
resultList.Add(pvIdC);
}
}
if (resultList.Count > 0)
{
return Json(new { resultList }); //Json() ---MVC的JSON 方法會自動把ListT> IEnumerableT>轉換為 Json ArrayT>
}
else
{
return Json("success");
}
}
return null;
}
public class pvIdsCount
{
public int pvId { set; get; }
public int count { set; get; }
}

AJAX
success: function (data) {
if (data == "success") {
}
} else {
$.each(data.resultList, function (index, value) {
$("#Item_PVId_" + value.pvId).html("This Product's Stock Not Enough.Stock is " + value.count);
});
}
}