/// <summary>
/// 在指定的字符串列表CnStr中检索符合拼音索引字符串
/// </summary>
/// <param name="CnStr">汉字字符串</param>
/// <returns>相对应的汉语拼音首字母串</returns>
public static string GetSpellCode(string CnStr)
{
string strTemp = "";
int iLen = CnStr.Length;
int i = 0;

for (i = 0; i <= iLen - 1; i++)
{
strTemp += GetCharSpellCode(CnStr.Substring(i, 1));
}

return strTemp;
}
/// <summary>
/// 得到一个汉字的拼音第一个字母，如果是一个英文字母则直接返回大写字母
/// </summary>
/// <param name="CnChar">单个汉字</param>
/// <returns>单个大写字母</returns>
private static string GetCharSpellCode(string CnChar)
{
long iCnChar;

byte[] ZW = System.Text.Encoding.Default.GetBytes(CnChar);

//如果是字母，则直接返回
if (ZW.Length == 1)
{
return CnChar.ToUpper();
}
else
{
// get the array of byte from the single char
int i1 = (short)(ZW[0]);
int i2 = (short)(ZW[1]);
iCnChar = i1 * 256 + i2;
}

// iCnChar match the constant
if ((iCnChar >= 45217) && (iCnChar <= 45252))
{
return "A";
}
else if ((iCnChar >= 45253) && (iCnChar <= 45760))
{
return "B";
}
else if ((iCnChar >= 45761) && (iCnChar <= 46317))
{
return "C";
}
else if ((iCnChar >= 46318) && (iCnChar <= 46825))
{
return "D";
}
else if ((iCnChar >= 46826) && (iCnChar <= 47009))
{
return "E";
}
else if ((iCnChar >= 47010) && (iCnChar <= 47296))
{
return "F";
}
else if ((iCnChar >= 47297) && (iCnChar <= 47613))
{
return "G";
}
else if ((iCnChar >= 47614) && (iCnChar <= 48118))
{
return "H";
}
else if ((iCnChar >= 48119) && (iCnChar <= 49061))
{
return "J";
}
else if ((iCnChar >= 49062) && (iCnChar <= 49323))
{
return "K";
}
else if ((iCnChar >= 49324) && (iCnChar <= 49895))
{
return "L";
}
else if ((iCnChar >= 49896) && (iCnChar <= 50370))
{
return "M";
}

else if ((iCnChar >= 50371) && (iCnChar <= 50613))
{
return "N";
}
else if ((iCnChar >= 50614) && (iCnChar <= 50621))
{
return "O";
}
else if ((iCnChar >= 50622) && (iCnChar <= 50905))
{
return "P";
}
else if ((iCnChar >= 50906) && (iCnChar <= 51386))
{
return "Q";
}
else if ((iCnChar >= 51387) && (iCnChar <= 51445))
{
return "R";
}
else if ((iCnChar >= 51446) && (iCnChar <= 52217))
{
return "S";
}
else if ((iCnChar >= 52218) && (iCnChar <= 52697))
{
return "T";
}
else if ((iCnChar >= 52698) && (iCnChar <= 52979))
{
return "W";
}
else if ((iCnChar >= 52980) && (iCnChar <= 53640))
{
return "X";
}
else if ((iCnChar >= 53689) && (iCnChar <= 54480))
{
return "Y";
}
else if ((iCnChar >= 54481) && (iCnChar <= 55289))
{
return "Z";
}
else return ("");
}