【总结】Array获取子数组

0.  扩展方法如下

[C#] 纯文本查看 复制代码

        /// <summary>
        /// 从此实例检索子数组
        /// </summary>
        /// <param name="source">要检索的数组</param>
        /// <param name="startIndex">起始索引号</param>
        /// <param name="length">检索最大长度</param>
        /// <returns>与此实例中在 startIndex 处开头、长度为 length 的子数组等效的一个数组</returns>
        public static Array SubArray(this Array source, Int32 startIndex, Int32 length)
        {
                if (startIndex < 0 || startIndex > source.Length || length < 0)
                {
                        throw new ArgumentOutOfRangeException();
                }

                Array Destination;
                if (startIndex + length <= source.Length)
                {
                        Destination = Array.CreateInstance(source.GetValue(0).GetType(), length);
                        Array.Copy(source, startIndex, Destination, 0, length);
                }
                else
                {
                        Destination = Array.CreateInstance(source.GetValue(0).GetType(), source.Length - startIndex);
                        Array.Copy(source, startIndex, Destination, 0, source.Length - startIndex);
                }

                return Destination;
        }

1. 调用示例如下

[C#] 纯文本查看 复制代码

            byte[] src = { 1, 2, 3, 4, 5, 6, 7, 8 };
            byte[] des = (byte[])src.SubArray(2, 3);
            foreach (var data in des)
            {
                Console.WriteLine(data.ToString());
            }

2. 输出结果

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