Obtain the first letter C # Of a Chinese character string.

Obtain the first letter of the Chinese character in the string (modified according to http://blog.csdn.net/iwebsms/archive/2004/09/28/119851.aspx)

The code may be bloated. I hope some friends can help me correct it.

// Returns the first letter of a given string.
Private String IndexCode (String IndexTxt)
{
String _ Temp = null;
For (int I = 0; I <IndexTxt. Length; I ++)
_ Temp = _ Temp + GetOneIndex (IndexTxt. Substring (I, 1 ));
Return _ Temp;
}

// Obtain the first letter of a single character
Private String GetOneIndex (String OneIndexTxt)
{
If (Convert. ToChar (OneIndexTxt)> = 0 & Convert. ToChar (OneIndexTxt) <256)
Return OneIndexTxt;
Else
{
Encoding gb2312 = Encoding. GetEncoding ("gb2312 ");
Byte [] unicodeBytes = Encoding. Unicode. GetBytes (OneIndexTxt );
Byte [] gb2312Bytes = Encoding. Convert (Encoding. Unicode, gb2312, unicodeBytes );
Return GetX (Convert. ToInt32 (
String. Format ("{0: D2}", Convert. ToInt16 (gb2312Bytes [0])-160)
+ String. Format ("{0: D2}", Convert. ToInt16 (gb2312Bytes [1])-160)
));
}

}

// Obtain the first letter Based on the location
Private String GetX (int GBCode)
{
If (GBCode> = 1601 & GBCode <1637) return "";
If (GBCode> = 1637 & GBCode <1833) return "B ";
If (GBCode> = 1833 & GBCode <2078) return "C ";
If (GBCode> = 2078 & GBCode <2274) return "D ";
If (GBCode> = 2274 & GBCode <2302) return "E ";
If (GBCode> = 2302 & GBCode <2433) return "F ";
If (GBCode> = 2433 & GBCode <2594) return "G ";
If (GBCode> = 2594 & GBCode <2787) return "H ";
If (GBCode> = 2787 & GBCode <3106) return "J ";
If (GBCode> = 3106 & GBCode <3212) return "K ";
If (GBCode> = 3212 & GBCode <3472) return "L ";
If (GBCode> = 3472 & GBCode <3635) return "M ";
If (GBCode> = 3635 & GBCode <3722) return "N ";
If (GBCode> = 3722 & GBCode <3730) return "O ";
If (GBCode> = 3730 & GBCode <3858) return "P ";
If (GBCode> = 3858 & GBCode <4027) return "Q ";
If (GBCode> = 4027 & GBCode <4086) return "R ";
If (GBCode> = 4086 & GBCode <4390) return "S ";
If (GBCode> = 4390 & GBCode <4558) return "T ";
If (GBCode> = 4558 & GBCode <4684) return "W ";
If (GBCode> = 4684 & GBCode <4925) return "X ";
If (GBCode> = 4925 & GBCode <5249) return "Y ";
If (GBCode> = 5249 & GBCode <= 5589) return "Z ";
If (GBCode> = 5601 & GBCode <= 8794)
{
String CodeData = "success"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Alarm"
+ "Success ";
String _ gbcode = GBCode. ToString ();
Int pos = (Convert. toInt16 (_ gbcode. substring (0, 2)-56) * 94 + Convert. toInt16 (_ gbcode. substring (_ gbcode. length-2, 2 ));
Return CodeData. Substring (pos-1, 1 );
}
Return "";
}