如何将对象数量放入_StoredStock
?数量是一个对象,我发现很难将其转换为int
以将值放入_StoredStock
。
class EachStock: Stock
{
public override void bookStock(Quantity quantity)
{
if (quantity.GetType() == typeof(EachStockQuantity))
{
//How to placethe object quantity into a _BookedStock
// the quantity is an object which I find it hard to convert it to int for _StoredStock
}
}
}
答案 0 :(得分:1)
您尝试在整数变量中存储类实例。我认为问题的一部分是参数名称具有误导性,因为它不是数量,而是具有数量属性的类。
访问您需要的媒体资源,在这种情况下Quantity
:
public override void AdjustStock(StockQuantity stockQty)
{
if (stockQty.GetType() == typeof(DiscreteStockQuantity))
_StoredStock = ((DiscreteStockQuantity)stockQty).Quantity;
}
或者,可能稍微更具可读性(但这是一个意见问题):
public override void AdjustStock(StockQuantity stockQty)
{
var discStockQty = stockQty as DiscreteStockQuantity;
if (discStockQty != null)
_StoredStock = discStockQty.Quantity;
}
答案 1 :(得分:0)
有多种方法可以了解类型并进行实际转换。
这是一个懒惰的例子:
class Program
{
static void Main(string[] args)
{
object obj = new Foo();
Type objType = obj.GetType();
if(objType == typeof(Foo))
{
var foobar = (Foo)obj;
Console.WriteLine(foobar.Bar);
}
else if(objType == typeof(int))
{
// Do something
}
else
{
// Do something
}
// If you are brave enough you can use dynamic
dynamic bar = obj;
Console.WriteLine(bar.Bar);
Console.ReadLine();
}
}
class Foo
{
public string Bar { get; set; }
public Foo()
{
Bar = "FooBar";
}
}
输出:
FooBar
FooBar
更新
以下是与您的问题类似的示例
class Program
{
static void Main(string[] args)
{
int i = FooBar(new Foo());
Console.WriteLine(i);
Console.ReadLine();
}
public static int FooBar(FooBase fooBase)
{
int val = -1;
Type type = fooBase.GetType();
if(type == typeof(Foo))
{
Foo foo = (Foo)fooBase;
val = foo.Bar;
}
else
{
// Do something
}
return val;
}
}
class Foo : FooBase
{
public int Bar { get; set; }
public Foo()
{
Bar = 999;
}
}
class FooBase
{
}
输出:
999
答案 2 :(得分:0)
试试这个:
dM[, time := unique(gsub("\\D+", "", names(data)[-1]))[time]][]