如何將多個值從listview列存儲到數據庫asp.net的單個條目C＃

Question

我需要存儲從列表視圖到我的數據庫的單個條目的多列的值。

ID    |  Description  |  Price
1     |  Big          |  20
2     |  Large        |  40
3     |  Small        |  60

我想將值（大，大，小）存儲到單獨的表中

ID    |  Description        | Price
1     |  Big, Large, Small  | 120

ive tried using 
foreach (ListView s in ????? )
{
}

請幫我... ：）

Answer 1

您可以使用以下代碼代替foreach。

class Product
        {
            public int ID { get; set; }
            public string Description { get; set; }
            public int Price { get; set; }
        }

將測試數據分配到列表

List<Product> list = new List<Product>() { 
                new Product() { ID = 1, Description = "BBB" , Price = 10},
                new Product() { ID = 2, Description = "CCC" , Price = 40},
                new Product() { ID = 3, Description = "DDD" , Price = 60}};
            List<Product> newList = new List<Product>();
            newList.Add(new Product() { ID = list[0].ID ,  Description = string.Join(", ", list.Select(a => a.Description).ToArray()), 
                Price = list.Select(a => a.Price).Sum()});

另外，如果您想從ListView中獲取價值，則可以使用以下代碼。

var p = new Product()
                        {
                            ID = Convert.ToInt32((ListView1.Items[0].FindControl("lblID") as Label).Text),
                            Description = string.Join(", ", (ListView1.Items.Select(a => (a.FindControl("lblDescription") as Label).Text)).ToArray()),
                            Price = ListView1.Items.Select(a => Convert.ToInt32((a.FindControl("lblPrice") as Label).Text)).Sum()
                    };

而且，您還必須用標簽替換“ lblID”。