c# - 使用 foreach 循环遍历列表

Question

当尝试遍历如下列表时，我将如何实现foreach循环？

ProductCollection myCollection = new ProductCollection
{
   Products = new List<Product>
   {
      new Product { Name = "Kayak", Price = 275M},
      new Product { Name = "Lifejacket", Price = 48.95M },
      new Product { Name = "Soccer ball", Price = 19.60M },
      new Product { Name = "Corner flag", Price = 34.95M }
   }
};

Answer 1

foreach(var product in myCollection.Products)
{
    // Do something with product
}

Answer 2

foreach (var item in myCollection.Products) 
{
   //your code here
}

Answer 3

似乎您有一个包含集合的集合。在这种情况下，您可以使用嵌套的 foreach 进行迭代，但如果您只想要产品，它就不太漂亮了。

相反，您可以使用 LINQSelectMany扩展方法来展平集合：

foreach(var product in myCollection.SelectMany(col => col.Products))
    ; // work on product

Answer 4

如果您希望我们帮助您，您必须向我们展示所有相关代码。

无论如何，如果 ProductCollection 是这样的：

 public class ProductCollection 
 {
      public List<Product> Products {get; set;}
 }

然后像这样填写：

 ProductCollection myCollection = new ProductCollection
    {
        Products = new List<Product>
        {
            new Product { Name = "Kayak", Price = 275M},
            new Product { Name = "Lifejacket", Price = 48.95M },
            new Product { Name = "Soccer ball", Price = 19.60M },
            new Product { Name = "Corner flag", Price = 34.95M }
        }
    };

并像这样迭代：

 foreach (var product in myCollection.Products) 
 {
      var name = product.Name;
      // etc...
 }

Answer 5

尝试：

 foreach(Product product in myCollection.Products)
 {

 }

Answer 6

尝试这个。-

foreach (var product in myCollection.Products) {
    // Do your stuff
}