C# 汉字和Unicode编码互相转换

原文地址 https://blog.csdn.net/chengmodelong/article/details/42870485

/// <summary>
/// <summary>
/// 字符串转Unicode

/// </summary>
/// <param name="source">源字符串</param>
/// <returns>Unicode编码后的字符串</returns>
public static string String2Unicode(string source)
{
    byte[] bytes = Encoding.Unicode.GetBytes(source);
    StringBuilder stringBuilder = new StringBuilder();
    for (int i = 0; i < bytes.Length; i += 2)
    {
        stringBuilder.AppendFormat("\\u{0}{1}", bytes[i + 1].ToString("x").PadLeft(2, '0'), bytes[i].ToString("x").PadLeft(2, '0'));
    }
    return stringBuilder.ToString();
}
 
/// <summary>
/// Unicode转字符串
/// </summary>
/// <param name="source">经过Unicode编码的字符串</param>
/// <returns>正常字符串</returns>
public static string Unicode2String(string source)
{
    return new Regex(@"\\u([0-9A-F]{4})", RegexOptions.IgnoreCase | RegexOptions.Compiled).Replace(
                 source, x => string.Empty + Convert.ToChar(Convert.ToUInt16(x.Result("$1"), 16)));
}