要获取数组中存在的元素总数,代码如下-
using System; public class Demo { public static void Main() { string[] products = { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" }; Console.WriteLine("Products list..."); foreach(string s in products) { Console.WriteLine(s); } Console.WriteLine("Array length = "+products.GetLength(0)); Console.WriteLine("\nOne or more products begin with the letter 'C'? = {0}", Array.Exists(products, ele => ele.StartsWith("C"))); Console.WriteLine("One or more planets begin with 'D'? = {0}", Array.Exists(products, ele => ele.StartsWith("D"))); Console.WriteLine("One or more products begin with the letter 'T'? = {0}", Array.Exists(products, ele => ele.StartsWith("T"))); Console.WriteLine("One or more planets begin with 'E'? = {0}", Array.Exists(products, ele => ele.StartsWith("E"))); } }
输出结果
这将产生以下输出-
Products list... Electronics Accessories Clothing Toys Clothing Furniture Array length = 6 One or more products begin with the letter 'C'? = True One or more planets begin with 'D'? = False One or more products begin with the letter 'T'? = True One or more planets begin with 'E'? = True
让我们看另一个例子-
using System; public class Demo { public static void Main() { string[] products = new string[] { }; Console.WriteLine("Array length = "+products.GetLength(0)); Console.WriteLine("Is the array having fixed size? = " + products.IsFixedSize); Console.WriteLine("Is the array read only? = " + products.IsReadOnly); } }
输出结果
这将产生以下输出-
Array length = 0 Is the array having fixed size? = True Is the array read only? = False