需要知道如何在每次掃描時在每兩個字符之間插入一個空格，並在每次掃描時在文本之間插入一行空格

Question

public partial class Form1 : Form 
    { 
     public delegate void AddDataDelegate(String myString); 
     public AddDataDelegate myDelegate; 
     string[] Tags; 
     public Form1() 
     { 
      InitializeComponent(); 

      SerialPort RFID = new SerialPort(); 
      RFID.PortName = "COM5"; 
      RFID.BaudRate = 9600; 
      RFID.DataBits = 8; 
      RFID.Parity = Parity.None; 
      RFID.StopBits = StopBits.One; 
      RFID.Open(); 
      RFID.DataReceived += new  SerialDataReceivedEventHandler(RFID_DataReceived); 
      this.myDelegate = new AddDataDelegate(AddDataMethod); 
     } 

     public void AddDataMethod(String myString) 
     { 
      textBox1.AppendText(myString); 
     } 
     public void RFID_DataReceived(object sender, SerialDataReceivedEventArgs e) 
     { 
      SerialPort RFID = (SerialPort)sender; 
      int buffer = RFID.ReadBufferSize; 
      byte[] data = new byte[buffer]; 
      RFID.Read(data, 0, buffer); 
      string s; 
      for (int i = 0; i < 18; i++) 
      { 
       s = Convert.ToString(data[i], 16); 
       //Console.WriteLine(Convert.ToString(data[i], 16)); 
       textBox1.Invoke(this.myDelegate, new Object[] { s }); 
      } 
      //Console.WriteLine(Convert.ToString(i,16)); 
      //textBox1.Invoke(this.myDelegate, new Object[] { s }); 
     } 

上面的內容將數據打印到文本框中。如何創建每兩個字符的空格，並在每次掃描的數據之間留出一行。

經過三次掃描電流輸出：

00e203027313032180000000605641acff00000000000000e20302731301716606c200001b5ff00000000000000000e203027313000000000001716606c21b5ff000000000

Answer 1

您可以分別轉換字節後添加一個空格並追加新行（Environment.NewLine）您已轉換整個緩衝區後。

也請注意，myDelegate應在循環之後被稱爲：

public void RFID_DataReceived(object sender, SerialDataReceivedEventArgs e) 
{ 
    SerialPort RFID = (SerialPort)sender; 
    int buffer = RFID.ReadBufferSize; 
    byte[] data = new byte[buffer]; 
    RFID.Read(data, 0, buffer); 
    string s = ""; 
    for (int i = 0; i < 18; i++) 
    { 
     s += Convert.ToString(data[i], 16) + " "; 
    } 
    s += Environment.NewLine; 
    textBox1.Invoke(this.myDelegate, new Object[] { s }); 
} 

---

替代解決方案：

隨着LINQ你的一點幫助一氣呵成可以格式化你的輸出字符串：

public void RFID_DataReceived(object sender, SerialDataReceivedEventArgs e) 
{ 
    SerialPort RFID = (SerialPort)sender; 
    int buffer = RFID.ReadBufferSize; 
    byte[] data = new byte[buffer]; 
    RFID.Read(data, 0, buffer); 

    string s = string.Join(" ", data.Select(b => b.ToString("x2"))) + Environment.NewLine; 

    textBox1.Invoke(this.myDelegate, new Object[] { s }); 
} 

，其中

• data.Select(b => b.ToString("x2"))字節數組轉換爲使用x2格式的字節字符串表示的陣列。
• string.Join(" ", ...)連接此字符串數組到一個串與由空間
• + Environment.NewLine限定的元件終於確保了下一個數據部分將去到一個新行。