2023-05-18 C#: Duplicate Byte Array

There are two byte arrays which are populated with different values.

byte[] array1 = new byte[5];
byte[] array2 = new byte[5];

We need array1 to get exactly the same values as array2, by using
```
array1 = array2;
```
, it is just set references.

Solution

One solution is

byte[] array1 = new byte[5];
// copy the values to array1
byte[] array2 = array1.ToArray();

We also used in out CAN message receive routine as follows:

        private int Task_CanBusWriteReadMessage ()
        {
            // 傳送一個Message，並等待回傳的回應訊息
            // 將 Global.VAR_CanMsgSend Message傳送出去
            // 等待回應，存在 Global.VAR_CanMsgReceived
            // Return Value:
            //   =1, 成功收到回應
            //   =0, 沒有收到回應，Timeout
            
            Task_TransmitCanMessage(); // 傳送Message

            TimeoutTimer1.StartTimer(1000); // Timeout 1秒 
            // 開啟 SuperTimer的計時功能 --->
            TimeoutTimer1.Enable = true;
            Global.VAR_CanMessageReceived = false; // 先設為沒收到
            while (true)
            {
                Application.DoEvents(); // 讓應用程式可以處理其他事件
                if (Global.VAR_CanMessageReceived)
                {
                    // 收到CAN Message 時，跳出迴圈
                    // Console.WriteLine("Can Message Received..");
                    break;
                }
                // 若是Timeout時，跳出迴圈
                if (TimeoutTimer1.TimerExpired() == true)
                {
                    // MessageBox.Show("Receive timeout", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                    Console.WriteLine("Timeout.." + TimeoutTimer1.gTickCount.ToString());
                    break;
                }
            }

            // <--- Disable SuperTimer的計時功能；避免佔用 CPU 計算資源
            TimeoutTimer1.Enable = false;

            if (!Global.VAR_CanMessageReceived) 
            {
                // 沒有收到，而是Timeout的話
                return (0);
            }
            DEBUG_DumpCanReceivedMessage();
            // 原本只是把pointer指過去而已, 因此Array.Reverse會影響原本的Array
            Global.VAR_CanMsgDataReversed = Global.VAR_CanMsgReceived.DATA.ToArray(); // 將收到的CAN Message拿取出來
            Array.Reverse(Global.VAR_CanMsgDataReversed); // 將Array Reverse order
            // Console.WriteLine ("Received Msg: " + Global.VAR_CanMsgReceived.ID.ToString("X3") + ":");
            return (1);
        }

2023-05-18 C#: Duplicate Byte Array

Solution

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