十六进制数字（不是ASCII十六进制值）在VB.NET中字符串

问题描述

我试过寻找这个，但大多数人只是想将十六进制值转换为它们的ASCII等值。这不是我想要做的。

我正在查看VB.NET是否有一个简单的内置函数来执行此操作：

 私有函数NibbleToString（ByVal Nibble As Byte）As String 
 Dim retval As String = String.Empty 
 Select Case Nibble 
 
案例& H0 
 retval =0
案例& H1 
 retval =1
案例& H2 
 retval =2
案例& H3 
 retval =3
案例& H4 
 retval =4
案例& H5 
 retval =5
案例& H6 
 retval =6
案例& H7 
 retval =7
案例& H8 
 retval =8
案例& H9 
 retval =9
案例& HA 
 retval =A
案例& HB 
 retval =B
 Case& H C 
 retval =C
 Case& HD 
 retval =D
 Case& HE 
 retval =E
 Case& amp; amp; ; HF 
 retval =F
结束选择
 
返回retval 
结束功能
  

是否有更完美的方式来完成与该代码相同的功能？ 使用 ToString 与：

  Dim b As Byte = & HA3 
 Console.WriteLine（b.ToString（X））'显示A3
 
 Dim i As Integer =& H12AB89EF 
 Console.WriteLine（i .ToString（X））'显示12AB89EF
  

如果你只是想做因为某种原因，一次只能轻咬一下，那么你可以事先掩盖/移出数字的各个位：

  Dim b As Byte =& H5E 
 Console.WriteLine（（b和&HF）.ToString（X））'显示E（低半字节）
 Console.WriteLine（（b>> 4）.ToString（X））'显示5（高半字节）
  

I've tried searching for this, but most people just want to convert hex values into their ASCII equivalents. That's not what I am looking to do.

I'm looking to see if VB.NET has a simple built-in function to do this:

    Private Function NibbleToString(ByVal Nibble As Byte) As String
    Dim retval As String = String.Empty
    Select Case Nibble

        Case &H0
            retval = "0"
        Case &H1
            retval = "1"
        Case &H2
            retval = "2"
        Case &H3
            retval = "3"
        Case &H4
            retval = "4"
        Case &H5
            retval = "5"
        Case &H6
            retval = "6"
        Case &H7
            retval = "7"
        Case &H8
            retval = "8"
        Case &H9
            retval = "9"
        Case &HA
            retval = "A"
        Case &HB
            retval = "B"
        Case &HC
            retval = "C"
        Case &HD
            retval = "D"
        Case &HE
            retval = "E"
        Case &HF
            retval = "F"
    End Select

    Return retval
End Function

Is there a more elegant way to accomplish the same thing as that code?

解决方案

Use ToString with the X format specifier:

Dim b As Byte = &HA3
Console.WriteLine(b.ToString("X"))    ' displays "A3"

Dim i As Integer = &H12AB89EF
Console.WriteLine(i.ToString("X"))    ' displays "12AB89EF"

And if you did just want to do a nibble at a time for some reason then you could just mask/shift out the various bits of the number beforehand:

Dim b As Byte = &H5E
Console.WriteLine((b And &HF).ToString("X"))    ' displays "E" (low nibble)
Console.WriteLine((b >> 4).ToString("X"))       ' displays "5" (high nibble)

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