微信小程序提交 webapi FormDataCollection

/// <returns></returns>
        [HttpPost]
        public ShoppingCartModel UpdateCart(FormDataCollection form)
        {}

微信小程序提交此参数应如下填写

var data =new Array();  

    var items = this.data.items;
    items.forEach(v => {
      if (v.selected) {
        var key = "itemquantity" + v.id;
        var value = v.inputQuantity
        data.push({key,value});
      }
    });