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【CSharp】实现BCD码

作者:zgke / 发布于2014/7/29/ 701


	string _BcdText = Zgke.ConvertByte.BCD.GetBcdEncode(123456, Zgke.ConvertByte.BCD.BcdType.码8421);

	 ulong _Value;

	 if(Zgke.ConvertByte.BCD.GetBcdDecode(_BcdText,Zgke.ConvertByte.BCD.BcdType.码8421,out _Value))
	 {
	 MessageBox.Show(_Value.ToString(), _BcdText);
	 }

	

	

	

	using System;
	using System.Collections.Generic;
	using System.Text;
	using System.Data;

	namespace Zgke.ConvertByte
	{
	 /// <summary>
	 /// BCD码操作
	 /// zgke@sina.com
	 /// qq:116149
	 /// </summary>
	 public class BCD
	 {
	 private static DataTable m_DataTable;

	 public enum BcdType
	 {
	 码8421,
	 码5421,
	 码2421,
	 余3码,
	 余3循环码
	 }
	 /// <summary>
	 /// 或BCD表数据
	 /// </summary>
	 /// <returns></returns>
	 private static DataTable GetBcdTable()
	 {
	 DataTable _BCDTable = new DataTable();
	 _BCDTable.Columns.Add("十进制数");
	 _BCDTable.Columns.Add("码8421");
	 _BCDTable.Columns.Add("码5421");
	 _BCDTable.Columns.Add("码2421");
	 _BCDTable.Columns.Add("余3码");
	 _BCDTable.Columns.Add("余3循环码");

	 _BCDTable.Rows.Add(new object[] { "0", "0000", "0000", "0000", "0011", "0010" });
	 _BCDTable.Rows.Add(new object[] { "1", "0001", "0001", "0001", "0100", "0110" });
	 _BCDTable.Rows.Add(new object[] { "2", "0010", "0010", "0010", "0101", "0111" });
	 _BCDTable.Rows.Add(new object[] { "3", "0011", "0011", "0011", "0110", "0101" });
	 _BCDTable.Rows.Add(new object[] { "4", "0100", "0100", "0100", "0111", "0100" });
	 _BCDTable.Rows.Add(new object[] { "5", "0101", "1000", "1011", "1000", "1100" });
	 _BCDTable.Rows.Add(new object[] { "6", "0110", "1001", "1100", "1001", "1101" });
	 _BCDTable.Rows.Add(new object[] { "7", "0111", "1010", "1101", "1010", "1111" });
	 _BCDTable.Rows.Add(new object[] { "8", "1000", "1011", "1110", "1011", "1110" });
	 _BCDTable.Rows.Add(new object[] { "9", "1001", "1100", "1111", "1100", "1010" });
	 return _BCDTable;
	 }

	 /// <summary>
	 /// BCD解码
	 /// </summary>
	 /// <param name="p_Value">BCD码</param>
	 /// <param name="p_BcdType">BCD码类型</param>
	 /// <param name="p_LongValue">返回数据</param>
	 /// <returns>false 解码失败 true解编成功</returns>
	 public static bool GetBcdDecode(string p_Value, BcdType p_BcdType, out ulong p_LongValue)
	 {
	 if (m_DataTable == null) m_DataTable = GetBcdTable();
	 p_LongValue = 0;
	 StringBuilder _Return = new StringBuilder();
	 if (p_Value.Length % 4 == 0)
	 {
	 int _Count = p_Value.Length / 4;
	 string _ValueText = p_Value.ToString();
	 for (int i = 0; i != _Count; i++)
	 {
	 DataRow[] _Row = m_DataTable.Select(p_BcdType.ToString() + "=" + _ValueText.Substring(i * 4, 4));
	 if (_Row.Length == 0) return false;
	 _Return.Append(_Row[0]["十进制数"].ToString());
	 }
	 p_LongValue = Convert.ToUInt64(_Return.ToString());
	 return true;
	 }
	 return false;
	 }

	 /// <summary>
	 /// BCD编码
	 /// </summary>
	 /// <param name="p_Value">数据</param>
	 /// <param name="p_BcdType">编码方式</param>
	 /// <returns>编码 ""</returns>
	 public static string GetBcdEncode(ulong p_Value, BcdType p_BcdType)
	 {
	 if (m_DataTable == null) m_DataTable = GetBcdTable();
	 StringBuilder _Return = new StringBuilder();
	 string _ValueText = p_Value.ToString();
	 for (int i = 0; i != _ValueText.Length; i++)
	 {
	 DataRow[] _Row = m_DataTable.Select("十进制数=" + _ValueText[i].ToString());
	 if (_Row.Length == 0) return "";
	 _Return.Append(_Row[0][p_BcdType.ToString()].ToString());
	 }
	 return _Return.ToString();
	 }
	 }
	}

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