C# 异或校验两种方法

 1   
 2         public byte GetXor(byte[] data)
 3         {
 4             byte CheckCode = 0;
 5             int len = data.Length;
 6             for (int i = 0; i < len; i++)
 7             {
 8                 CheckCode ^= data[i];
 9             }
10             return CheckCode;
11         }
12 
13         private string CRC(string cmdString)
14         {
15             try
16             {
17                 //CRC寄存器
18                 int CRCCode = 0;
19                 //将字符串拆分成为16进制字节数据然后两位两位进行异或校验
20                 for (int i = 1; i < cmdString.Length / 2; i++)
21                 {
22                     string cmdHex = cmdString.Substring(i * 2, 2);
23                     if (i == 1)
24                     {
25                         string cmdPrvHex = cmdString.Substring((i - 1) * 2, 2);
26                         byte t = (byte)Convert.ToInt32(cmdHex, 10);
27                         byte tt = (byte)Convert.ToInt32(cmdPrvHex, 10);
28                          CRCCode = (byte)Convert.ToInt32(cmdPrvHex, 10) ^ (byte)Convert.ToInt32(cmdHex, 10);
29                     }
30                     else
31                     {
32                         CRCCode = (byte)CRCCode ^ (byte)Convert.ToInt32(cmdHex, 16);
33                     }
34                 }
35                 return Convert.ToString(CRCCode, 16).ToUpper();//返回16进制校验码
36             }
37             catch
38             {
39                 throw;
40             }
41         }
42 
43         private void button1_Click(object sender, EventArgs e)
44         {
45             try
46             {
47                 // txtZhi.Text = CRC(textBox1.Text.Replace(" ", ""));
48                 byte[] bytes = new byte[6];
49                 bytes[0] = 36;
50                 bytes[1] = 50;
51                 bytes[2] = 50;
52                 bytes[3] = 48;
53                 bytes[4] = 50;
54                 bytes[5] = 57;
55                 string cmd= "$31064";//$ 3 1 064 14
56                 ASCIIEncoding ascii = new ASCIIEncoding();
57                 Byte[] encodedBytes = ascii.GetBytes(cmd);
58                 byte code = GetXor(encodedBytes);
59                  
60                 txtZhi.Text = cmd+ Convert.ToString(code, 16).ToUpper();
61             }
62             catch
63             {
64                 MessageBox.Show("校验失败,请检查字符串是否包含特殊字符");
65             }
66         }
67 
68         private void button2_Click(object sender, EventArgs e)
69         {
70             ASCIIEncoding ascii = new ASCIIEncoding();
71             Byte[] encodedBytes = ascii.GetBytes(textBox1.Text);
72         }