如何在C#中打印字典集合？

Question

我正试图在这里打印出一个数组/集合.我有一个包含以下代码的类文件来打印文本:

//Display All
    public void Display()
    {
        Console.WriteLine(ID + "\t" + Product + "\t" + Category + "\t" + Price + "\t" + Stock + "\t" + InBasket);
    }

然后,在main中我尝试使用以下方法将其实际打印到屏幕上:

foreach (KeyValuePair<int, Farm_Shop> temp in products)
        {
            //display each product to console by using Display method in Farm Shop class
            temp.Display();
        }

但是我收到以下错误:

'System.Collections.Generic.KeyValuePair<int,Farm_Shop_Assignment.Farm_Shop>' 
does not contain a definition for 'Display' and no extension method 'Display'
accepting a first argument of type 
'System.Collections.Generic.KeyValuePair<int,Farm_Shop_Assignment.Farm_Shop>' 
could be found (are you missing a using directive or an assembly reference?)

这是我要打印的实际内容:

products = new Dictionary<int, Farm_Shop>
        {
            { 1, new Farm_Shop(1, "Apple", "Fruit\t", 0.49, 40, 'n') },
            { 2, new Farm_Shop(2, "Orange", "Fruit\t", 0.59, 35, 'n') }
        };

根据我的理解,这不起作用,因为我只发送要打印的数组/集合,而不是如果你知道我的意思,那就是要在它之前出现的int.

有人能告诉我如何让它正确打印.

非常感激.谢谢.

Answer 1

Display()是一种方法Farm_Shop.您不能直接在类型的对象上调用它KeyValuePair<int, Farm_Shop>.您应该这样做以访问键/值对中的Farm_Shop实例:

foreach (KeyValuePair<int, Farm_Shop> temp in products)
    {
        //display each product to console by using Display method in Farm Shop class
        temp.Value.Display();
    }

或者遍历Values属性,因为密钥不会为您增加太多(因为它来自一个属性Farm_Shop:

foreach (Farm_Shop temp in products.Values)
    {
        //display each product to console by using Display method in Farm Shop class
        temp.Display();
    }