63 lines
2.1 KiB
C#
63 lines
2.1 KiB
C#
using System;
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using System.Text;
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namespace EAS.Distributed
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{
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static class Bytes
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{
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/// <summary>
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/// 将指定的字节数组转换为HEX字符串。
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/// </summary>
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/// <param name="buffer">要转换的字节数组。</param>
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/// <returns>返回已经转换的字节数组字符串。</returns>
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public static string ToHex(this byte[] buffer)
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{
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if (buffer == null)
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return null;
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if (buffer.Length == 0)
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return string.Empty;
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < buffer.Length; i++)
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{
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sb.Append(buffer[i].ToString("X2"));
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}
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return sb.ToString();
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}
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/// <summary>
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/// 将格式为“XXXX”的字符串。（其中“xx”为每一个字节的十六进制表示）转换为相应的字节数组。
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/// </summary>
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/// <param name="s">要转换的字符串。</param>
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/// <returns>返回转换后的字节数组。</returns>
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/// <exception cref="ArgumentNullException">s 为空引用。</exception>
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/// <exception cref="ArgumentException">字符串 s 格式无效。</exception>
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/// <remarks>如果 s 为空字符串，则返回长度为 0 的字节数组。</remarks>
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public static byte[] FromHex(this string s)
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{
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if (s == null)
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throw new ArgumentNullException("s", "要转换的字符串不能是空引用。");
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if (s.Trim() == string.Empty)
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return new byte[0];
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if (s.Length % 2 != 0)
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throw new ArgumentNullException("s", "要转换的字符串长度必须为2的整数倍。");
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byte[] buffer = new byte[s.Length / 2];
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for (int i = 0; i < buffer.Length; i++)
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{
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string Text = s.Substring(i * 2, 2);
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try
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{
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buffer[i] = byte.Parse(Text, System.Globalization.NumberStyles.AllowHexSpecifier);
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}
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catch (System.FormatException exc)
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{
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throw new System.ArgumentException("无效的字节字符串格式。", "s", exc);
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}
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}
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return buffer;
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}
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}
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}
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