Question

当尝试循环列表如下所示时，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

似乎你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，但如果您只是想要产品，那就不太漂亮了。

相反，您可以使用LINQ SelectMany扩展方法来展平集合：

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

Answer 4

如果您希望我们为您提供帮助，您必须向我们展示所有相关代码。

无论如何，如果ProductCollection如：

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

然后填写它：

 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 }
        }
    };

并迭代如下：

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

Answer 5

尝试：

 foreach(Product product in myCollection.Products)
 {

 }

Answer 6

试试这个.-

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

使用foreach循环遍历列表

6 个答案: