在 C# 中将字符串转换为十六进制字符串
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Convert string to hex-string in C#
提问by Dariush Jafari
I have a string like "sample". I want to get a string of it in hex format; like this:
我有一个像“sample”这样的字符串。我想以十六进制格式获取它的字符串；像这样：
"796173767265"
Please give the C# syntax.
请给出 C# 语法。
采纳答案by Mike Perrenoud
First you'll need to get it into a byte[], so do this:
首先，您需要将其放入一个byte[]，因此请执行以下操作：
byte[] ba = Encoding.Default.GetBytes("sample");
and then you can get the string:
然后你可以得到字符串：
var hexString = BitConverter.ToString(ba);
now, that's going to return a string with dashes (-) in it so you can then simply use this:
现在，这将返回一个带有破折号 ( -)的字符串，因此您可以简单地使用它：
hexString = hexString.Replace("-", "");
to get rid of those if you want.
如果你想摆脱那些。
NOTE:you could use a different Encodingif you needed to.
注意：Encoding如果需要，您可以使用不同的。
回答by Damith
var result = string.Join("", input.Select(c => ((int)c).ToString("X2")));
OR
或者
var result =string.Join("",
input.Select(c=> String.Format("{0:X2}", Convert.ToInt32(c))));
回答by fubo
According to this snippet here, this approach should be good for long strings:
根据这里的这个片段，这种方法应该适用于长字符串：
private string StringToHex(string hexstring)
{
StringBuilder sb = new StringBuilder();
foreach (char t in hexstring)
{
//Note: X for upper, x for lower case letters
sb.Append(Convert.ToInt32(t).ToString("x"));
}
return sb.ToString();
}
usage:
用法：
string result = StringToHex("Hello world"); //returns "48656c6c6f20776f726c64"
Another approach in one line
一行中的另一种方法
string input = "Hello world";
string result = String.Concat(input.Select(x => ((int)x).ToString("x")));
回答by franckspike
For Unicode support:
对于 Unicode 支持：
public class HexadecimalEncoding
{
public static string ToHexString(string str)
{
var sb = new StringBuilder();
var bytes = Encoding.Unicode.GetBytes(str);
foreach (var t in bytes)
{
sb.Append(t.ToString("X2"));
}
return sb.ToString(); // returns: "48656C6C6F20776F726C64" for "Hello world"
}
public static string FromHexString(string hexString)
{
var bytes = new byte[hexString.Length / 2];
for (var i = 0; i < bytes.Length; i++)
{
bytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
}
return Encoding.Unicode.GetString(bytes); // returns: "Hello world" for "48656C6C6F20776F726C64"
}
}
回答by Slai
few Unicode alternatives
少数 Unicode 替代品
var s = "0";
var s1 = string.Concat(s.Select(c => $"{(int)c:x4}")); // left padded with 0 - "0030d835dfcfd835dfdad835dfe5d835dff0d835dffb"
var sL = BitConverter.ToString(Encoding.Unicode.GetBytes(s)).Replace("-", ""); // Little Endian "300035D8CFDF35D8DADF35D8E5DF35D8F0DF35D8FBDF"
var sB = BitConverter.ToString(Encoding.BigEndianUnicode.GetBytes(s)).Replace("-", ""); // Big Endian "0030D835DFCFD835DFDAD835DFE5D835DFF0D835DFFB"
// no encodding "300035D8CFDF35D8DADF35D8E5DF35D8F0DF35D8FBDF"
byte[] b = new byte[s.Length * sizeof(char)];
Buffer.BlockCopy(s.ToCharArray(), 0, b, 0, b.Length);
var sb = BitConverter.ToString(b).Replace("-", "");
