我有一个字节[]数组,从一个文件加载,我碰巧知道包含UTF-8。

在一些调试代码中,我需要将其转换为字符串。是否有一个单行程序可以做到这一点?

在表面之下,它应该只是一个分配和一个memcopy,所以即使没有实现,也应该是可能的。


当前回答

string result = ASCIIEncoding.UTF8.GetString(byteArray);

其他回答

至少有四种不同的转换方式。

Encoding's GetString, but you won't be able to get the original bytes back if those bytes have non-ASCII characters. BitConverter.ToString The output is a "-" delimited string, but there's no .NET built-in method to convert the string back to byte array. Convert.ToBase64String You can easily convert the output string back to byte array by using Convert.FromBase64String. Note: The output string could contain '+', '/' and '='. If you want to use the string in a URL, you need to explicitly encode it. HttpServerUtility.UrlTokenEncodeYou can easily convert the output string back to byte array by using HttpServerUtility.UrlTokenDecode. The output string is already URL friendly! The downside is it needs System.Web assembly if your project is not a web project.

完整的例子:

byte[] bytes = { 130, 200, 234, 23 }; // A byte array contains non-ASCII (or non-readable) characters

string s1 = Encoding.UTF8.GetString(bytes); // ���
byte[] decBytes1 = Encoding.UTF8.GetBytes(s1);  // decBytes1.Length == 10 !!
// decBytes1 not same as bytes
// Using UTF-8 or other Encoding object will get similar results

string s2 = BitConverter.ToString(bytes);   // 82-C8-EA-17
String[] tempAry = s2.Split('-');
byte[] decBytes2 = new byte[tempAry.Length];
for (int i = 0; i < tempAry.Length; i++)
    decBytes2[i] = Convert.ToByte(tempAry[i], 16);
// decBytes2 same as bytes

string s3 = Convert.ToBase64String(bytes);  // gsjqFw==
byte[] decByte3 = Convert.FromBase64String(s3);
// decByte3 same as bytes

string s4 = HttpServerUtility.UrlTokenEncode(bytes);    // gsjqFw2
byte[] decBytes4 = HttpServerUtility.UrlTokenDecode(s4);
// decBytes4 same as bytes

这是一个不需要编码的结果。我在我的网络类中使用它,并以字符串的形式发送二进制对象。

public static byte[] String2ByteArray(string str)
{
    char[] chars = str.ToArray();
    byte[] bytes = new byte[chars.Length * 2];

    for (int i = 0; i < chars.Length; i++)
        Array.Copy(BitConverter.GetBytes(chars[i]), 0, bytes, i * 2, 2);

    return bytes;
}

public static string ByteArray2String(byte[] bytes)
{
    char[] chars = new char[bytes.Length / 2];

    for (int i = 0; i < chars.Length; i++)
        chars[i] = BitConverter.ToChar(bytes, i * 2);

    return new string(chars);
}

定义:

public static string ConvertByteToString(this byte[] source)
{
    return source != null ? System.Text.Encoding.UTF8.GetString(source) : null;
}

使用:

string result = input.ConvertByteToString();

还有一个类UnicodeEncoding,使用起来非常简单:

ByteConverter = new UnicodeEncoding();
string stringDataForEncoding = "My Secret Data!";
byte[] dataEncoded = ByteConverter.GetBytes(stringDataForEncoding);

Console.WriteLine("Data after decoding: {0}", ByteConverter.GetString(dataEncoded));

应用(字节)b to弦(“x2”),Outputs b4b5dfe475e58b67

public static class Ext {

    public static string ToHexString(this byte[] hex)
    {
        if (hex == null) return null;
        if (hex.Length == 0) return string.Empty;

        var s = new StringBuilder();
        foreach (byte b in hex) {
            s.Append(b.ToString("x2"));
        }
        return s.ToString();
    }

    public static byte[] ToHexBytes(this string hex)
    {
        if (hex == null) return null;
        if (hex.Length == 0) return new byte[0];

        int l = hex.Length / 2;
        var b = new byte[l];
        for (int i = 0; i < l; ++i) {
            b[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);
        }
        return b;
    }

    public static bool EqualsTo(this byte[] bytes, byte[] bytesToCompare)
    {
        if (bytes == null && bytesToCompare == null) return true; // ?
        if (bytes == null || bytesToCompare == null) return false;
        if (object.ReferenceEquals(bytes, bytesToCompare)) return true;

        if (bytes.Length != bytesToCompare.Length) return false;

        for (int i = 0; i < bytes.Length; ++i) {
            if (bytes[i] != bytesToCompare[i]) return false;
        }
        return true;
    }

}