c#实现16进制和字符串之间转换的代码
⼗六进制字符串与数值类型之间转换（C# 编程指南）
以下⽰例演⽰如何执⾏下列任务：
获取字符串中每个字符的⼗六进制值。
获取与⼗六进制字符串中的每个值对应的字符。
将⼗六进制 string 转换为整型。
将⼗六进制 string 转换为浮点型。
将字节数组转换为⼗六进制 string。
⽰例
此⽰例输出 string 中的每个字符的⼗六进制值。⾸先，它将 string 分析为字符数组，然后对每个字符调⽤ ToInt32(Char) 以获取相应的数字值。最后，在 string 中将数字的格式设置为⼗六进制表⽰形式。
C#
16进制字符串转16进制数组string input = "Hello World!";
char[] values = input.ToCharArray();
foreach (char letter in values)
{
// Get the integral value of the character.
int value = Convert.ToInt32(letter);
// Convert the decimal value to a hexadecimal value in string form.
string hexOutput = String.Format("{0:X}", value);
Console.WriteLine("Hexadecimal value of {0} is {1}", letter, hexOutput);
}
/* Output:
Hexadecimal value of H is 48
Hexadecimal value of e is 65
Hexadecimal value of l is 6C
Hexadecimal value of l is 6C
Hexadecimal value of o is 6F
Hexadecimal value of is 20
Hexadecimal value of W is 57
Hexadecimal value of o is 6F
Hexadecimal value of r is 72
Hexadecimal value of l is 6C
Hexadecimal value of d is 64
Hexadecimal value of ! is 21
*/
此⽰例分析⼗六进制值的 string 并输出对应于每个⼗六进制值的字符。⾸先，它调⽤ Split(array<Char>[]()[]) ⽅法以获取每个⼗六进制值作为数组中的单个 string。然后调⽤ ToInt32(String, Int32) 以将⼗六进制转换为表⽰为 int 的⼗进制值。⽰例中演⽰了⽤于获取对应于该字符代码的字符的两种不同⽅法。第⼀种⽅法是使⽤ ConvertFromUtf32(Int32)，它将对应于整型参数的字符作为 string 返回。第⼆种⽅法是将 int 显式转换为 char。
C#
string hexValues = "48 65 6C 6C 6F 20 57 6F 72 6C 64 21";
string[] hexValuesSplit = hexValues.Split(' ');
foreach (String hex in hexValuesSplit)
{
// Convert the number expressed in base-16 to an integer.
int value = Convert.ToInt32(hex, 16);
// Get the character corresponding to the integral value.
string stringValue = Char.ConvertFromUtf32(value);
char charValue = (char)value;
Console.WriteLine("hexadecimal value = {0}, int value = {1}, char value = {2} or {3}",
hex, value, stringValue, charValue);
}
/* Output:
hexadecimal value = 48, int value = 72, char value = H or H
hexadecimal value = 65, int value = 101, char value = e or e
hexadecimal value = 6C, int value = 108, char value = l or l
hexadecimal value = 6C, int value = 108, char value = l or l
hexadecimal value = 6F, int value = 111, char value = o or o
hexadecimal value = 20, int value = 32, char value = or
hexadecimal value = 57, int value = 87, char value = W or W
hexadecimal value = 6F, int value = 111, char value = o or o
hexadecimal value = 72, int value = 114, char value = r or r
hexadecimal value = 6C, int value = 108, char value = l or l
hexadecimal value = 64, int value = 100, char value = d or d
hexadecimal value = 21, int value = 33, char value = ! or !
*/
此⽰例演⽰了将⼗六进制 string 转换为整数的另⼀种⽅法，即调⽤ Parse(String, NumberStyles) ⽅法。
C#
string hexString = "8E2";
int num = Int32.Parse(hexString, System.Globalization.NumberStyles.HexNumber);
Console.WriteLine(num);
//Output: 2274
下⾯的⽰例演⽰如何使⽤ System..::.BitConverter 类和 Int32..::.Parse ⽅法将⼗六进制 string 转换为浮点型。C#
string hexString = "43480170";
uint num = uint.Parse(hexString, System.Globalization.NumberStyles.AllowHexSpecifier);
byte[] floatVals = BitConverter.GetBytes(num);
float f = BitConverter.ToSingle(floatVals, 0);
Console.WriteLine("float convert = {0}", f);
// Output: 200.0056
下⾯的⽰例演⽰如何使⽤ System..::.BitConverter 类将字节数组转换为⼗六进制字符串。
C#
byte[] vals = { 0x01, 0xAA, 0xB1, 0xDC, 0x10, 0xDD };
string str = BitConverter.ToString(vals);
Console.WriteLine(str);
str = BitConverter.ToString(vals).Replace("-", "");
Console.WriteLine(str);
/*Output:
01-AA-B1-DC-10-DD
01AAB1DC10DD
*/
只是msdn上的盗版！
复制代码代码如下:
public string StrToHex(string mStr) //返回处理后的⼗六进制字符串
{
return BitConverter.ToString(
ASCIIEncoding.Default.GetBytes(mStr)).Replace("-", " ");
} /* StrToHex */
public string HexToStr(string mHex) // 返回⼗六进制代表的字符串
{
mHex = mHex.Replace(" ", "");
if (mHex.Length <= 0) return "";
byte[] vBytes = new byte[mHex.Length / 2];
for (int i = 0; i < mHex.Length; i += 2)
if (!byte.TryParse(mHex.Substring(i, 2), NumberStyles.HexNumber, null, out vBytes[i / 2]))
vBytes[i / 2] = 0;
return ASCIIEncoding.Default.GetString(vBytes);
} /* HexToStr */
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