在 C# 中查找数组中最后一个元素的索引

要查找数组中最后一个元素的索引，代码如下 −

示例

 实时演示

using System;
public class Demo {
   public static void Main(){
      string[] products = new string[] { "Andy", "Mark", "Gary", "Andre"};
      Console.WriteLine("One or more name begin with 'A'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("A")));
      Console.WriteLine("Is the array having fixed size? = " + products.IsFixedSize);
      Console.WriteLine("Is the array read only? = " + products.IsReadOnly);
      Console.WriteLine("Is the array synchronized? = " + products.IsSynchronized);
      Console.WriteLine("Index of the 1st element = "+products.GetLowerBound(0));
      Console.WriteLine("Index of the last element = "+products.GetUpperBound(0));
   }
}

输出

这将产生以下输出 −

One or more name begin with 'A'? = True 
Is the array having fixed size? = True Is the array read only? = False
Is the array synchronized? = False Index of the 1st element = 0
Index of the last element = 3

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示例

现在我们来看看另一个示例 −

 实时演示

using System;
public class Demo {
   public static void Main(){
      string[] products = new string[] { };
      Console.WriteLine("Is the array having fixed size? = " + products.IsFixedSize);
      Console.WriteLine("Is the array read only? = " + products.IsReadOnly);
      Console.WriteLine("Is the array synchronized? = " + products.IsSynchronized);
      Console.WriteLine("Index of the 1st element = "+products.GetLowerBound(0));
      Console.WriteLine("Index of the last element = "+products.GetUpperBound(0));
   }
}

输出

这将产生以下输出 −

Is the array having fixed size? = True Is the array read only? = False
Is the array synchronized? = False Index of the 1st element = 0
Index of the last element = -1

更新于： 10-Dec-2019

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