如何使用textbox通过serialport（rs232）/ rs422发送26字节十六进制值 [英] how to send 26 byte hex value using textbox through serialport(rs232)/rs422

问题描述

如何使用textbox通过serialport发送26字节十六进制值（rs232）/ rs422

解决方案

从转换字符串的角度来看这个十六进制格式到byte []并将byte []转换为十六进制格式字符串，要求可选地使用十六进制字节用短划线分隔的格式：

 私人 静态 字符串 dash =    - ; 
 
  private   static   byte  [] ByteAryFromHexString（ string  hx）
 {
  //  < span class =code-comment>有破折号？删除它们 
  if （hx.Contains（dash））hx = hx.Replace（dash， ）; 
 
  //  不必要？ 
 hx = hx.ToUpperInvariant（ ）; 
 
  byte  [] result =  new   byte  [hx.Length /  2 ]; 
 
  for （ int  i =  0 ; i <  result.Length; i ++）
 {
 result [i] = Convert.ToByte（hx。子串（i * 2， 2 ）， 16 ）; 
} 
 
 返回结果; 
} 
 
  //  'withDash参数控制破折号是否在结果中：默认情况下设置为'false  
  private   static   string  HexStringFromByteArray（ byte  [] bytes， bool  withDash = < span class =code-keyword> false ）
 {
  var  result = BitConverter.ToString（bytes）; 
 
  if （withDash） return  result; 
 
  return （result.Replace（dash， ））; 
} 

测试：

  string  hx1 =  @   AA-55-55-55-15-55-6A-AA-FF-FF-00-00-FF-FF-00-10-00-06 -08-8F-00-E2-A0-80-08-D3\" ; 
 
  string  hx2 =  @  AA55555515556AAAFFFF0000FFFF00100006088F00E2A08008D3\" ; 
 
  private   void 测试（）
 {
  //  在下一行设置断点 
  //  并单步执行代码 
 
  byte  [] b1 = ByteAryFromHexString（hx1）; 
  byte  [] b2 = ByteAryFromHexString（hx2）; 
 
  //   b1和b2的值是否相同？ 
  string  enc1 = Encoding.UTF8.GetString（b1）; 
  string  enc2 = Encoding.UTF8.GetString（b2）; 
  bool  i1 = enc1 == enc2; 
 
  string  s1 = HexStringFromByteArray（b1， true ）; 
  string  s2 = HexStringFromByteArray（b2， false ）; 
 
  //   s1和s2不应该相同！ 
  bool  i2 = s1 =！= s2; 
} 

注意：十六进制格式字符串到字节[]转换是一个地方.NET并没有真正提供真正快速的内置转换。关于实现这一目标的最快方法存在很多争论：您可以在StackOverFlow上的线程上找到各种方法的广泛讨论和性能测量，如下所示：[ ^ ]。

how to send 26 byte hex value using textbox through serialport(rs232)/rs422

解决方案

Looking at this from the point of view of conversion of a string in hex format to byte[] and conversion of byte[] to hex format string with the requirement to optionally use a format where hex bytes are separated by dashes:

private static string dash = "-";

private static byte[] ByteAryFromHexString(string hx)
{
    // has dashes ? delete them
    if (hx.Contains(dash)) hx = hx.Replace(dash, "");
    
    // unnecessary ?
    hx = hx.ToUpperInvariant();
    
    byte[] result = new byte[hx.Length / 2];
    
    for (int i = 0; i < result.Length; i++)
    {
     result[i] = Convert.ToByte(hx.Substring(i*2,2), 16);
    }
    
    return result;
}

// the 'withDash parameter controls whether dashes are in the result : it's set to 'false by default
private static string HexStringFromByteArray(byte[] bytes, bool withDash = false)
{
    var result = BitConverter.ToString(bytes);
    
    if (withDash) return result;
    
    return (result.Replace(dash, ""));
}

Test:

string hx1 = @"AA-55-55-55-15-55-6A-AA-FF-FF-00-00-FF-FF-00-10-00-06-08-8F-00-E2-A0-80-08-D3";

string hx2 = @"AA55555515556AAAFFFF0000FFFF00100006088F00E2A08008D3";

private void Test()
{
    // set break-point on next line
    // and single-step through the code

    byte[] b1 = ByteAryFromHexString(hx1);
    byte[] b2 = ByteAryFromHexString(hx2);

    // do b1 and b2 have identical values ?
    string enc1 = Encoding.UTF8.GetString(b1);
    string enc2 = Encoding.UTF8.GetString(b2);
    bool i1 = enc1 == enc2;

    string s1 = HexStringFromByteArray(b1, true);
    string s2 = HexStringFromByteArray(b2, false);

    // s1 and s2 should not be the same !
    bool i2 = s1 =!= s2;
}

Note: Hex format String to Byte[] conversion is one place .NET doesn't really offer a really fast built-in conversion. There is a great deal of debate about the fastest way to achieve that: you can find extensive discussions, and performance measurements, of various methods on threads on StackOverFlow like this one: [^].

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