⼗六进制字符串与数值类型之间转换

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 integer value to a hexadecimal value in string form.
Console.WriteLine($"Hexadecimal value of {letter} is {value:X}");
}

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);
}

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。

string hexString = "8E2";
int num = Int32.Parse(hexString, System.Globalization.NumberStyles.HexNumber);
Console.WriteLine(num);
//Output: 2274

下面的示例演示了如何使用 System.BitConverter 类和 UInt32.Parse 方法将十六进制 string 转换为 float。

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

下面的示例演示了如何使用 System.BitConverter 类将字节数组转换为十六进制字符串。

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
*/

下面的示例演示如何通过调用 .NET 5.0 中引入的 Convert.ToHexString 方法，将字节数组转换为十六进制字符 串。

byte[] array = { 0x64, 0x6f, 0x74, 0x63, 0x65, 0x74 };
string hexValue = Convert.ToHexString(array);
Console.WriteLine(hexValue);
/*Output:
646F74636574
*/