PLC读取数据高低位交换，批量保存到list集合，方便调用。

 private void button1_Click(object sender, EventArgs e) {
          

            label1.Text = null;
            ushort[] nums = new ushort[] { 12, 34, 56, 78, 99, 11, 22, 33, 44, 26, 38 };

            for (int i = 0; i < nums.Length - 1; i += 2)
            {
                fun1(ref nums[i], ref nums[i + 1]);

            }

            if (nums.Length % 2 == 0) {
                for (int i = 0; i < nums.Length; i++)
                {
                    label1.Text += nums[i].ToString() + "--";
                }

            }
            else
            {
                for (int i = 0; i < nums.Length - 1; i++)
                {
                     label1.Text += nums[i].ToString() + "--";
                }
            }
            List<uint> res = new List<uint>();
            for (int j = 0; j < nums.Length - 1; j += 2)
            {
                // MessageBox.Show(MakeLong(nums[j],nums[j+1]).ToString());
                res.Add(MakeLong(nums[j], nums[j + 1]));

            }

            //foreach (var item in res)
            //{
            //    MessageBox.Show(item.ToString());
            //}

            for (int i = 0; i < res.Count; i++)
            {
                MessageBox.Show(res[i].ToString());
            }
        }

        public void fun1( ref ushort a, ref ushort b )
        {
            ushort temp;
            temp = a;
            a = b;
            b = temp;
            
        }


        private uint MakeLong(ushort x, ushort y)
        {
            return (uint)x << 16 | y;
        }