C # Mixed string interception in Chinese and English

 public class Stringhelper     {        public static string Getsubstring (string str, int len)         {             string result = String. empty;//final returned results             int bytelen = System.Text.Encoding.Default.GetByteCount (str);//single-byte character length              int charlen = str. length;//string length when the character is treated equal             int byteCount = 0;// Record read Progress             int pos = 0;//Record intercept location              if (Bytelen > Len)              {                 for (int i = 0; i < Charlen; i++)                 {                     if ( Convert.ToInt32 (str. ToCharArray () [i]) > 255)//calculated by Chinese characters plus 2                          ByteCount + = 2;                      else//by English characters plus 1                          ByteCount + = 1;

                     if (ByteCount > Len)//write down only the last valid location when you exceed it                      {                         pos = i;                          break;                     }                      else if (ByteCount = = len)//Make a note of the current location                      {                        pos = i + 1;                          break;                     }                }

if (POS >= 0) result = Str.             Substring (0, POS); } else result = str;

return result; }

       //<summary>        //C # Chinese and English mixed string interception        ///</summary>         //<param name= "inputstring" ></param>        //<param Name= "Length" > displayed character length *2</param>        //<returns></ returns>         public static string SubString (string inputstring, int length) & nbsp;       {            byte[] Ping = Encoding.UTF8.GetBytes (inputstring);             int Count=encoding.utf8.getbytecount ( InputString);             if (count <= length * 2)              {                return inputstring;            }              asciiencoding ASCII = new ASCIIEncoding ();             int templen = 0;             string tempstring = "";             byte[] s = ASCII. GetBytes (inputstring);             for (int i = 0; i < s.length; i++)   & nbsp;         {                ////to determine whether it is a Chinese character or a full foot symbol                  if ((int) s[i] = =)                 {                     Templen + = 2;                }                  Else                  {                     Templen + = 1;                }                  tempstring + = inputstring.substring (i, 1) ;                 if (Templen >= Length * 2)                     break;            }              return tempstring;        }

public static string Getsub (string sub, int length) {//byte[] bytstr = SYSTEM.TEXT.ENCODING.DEFAULT.G                Etbytes (sub); if (sub = = null) return string.             Empty;             int len = length * 2;             Aequilatelength is in Chinese and English equal width length, cutlength is the string length to intercept int aequilatelength = 0, cutlength = 0; Encoding Encoding = encoding.getencoding ("gb2312");

            string cutstr = Sub. ToString ();             int strlength = cutstr.length;             byte[] bytes;             for (int i = 0; i < strlength; i++)   & nbsp;         {                 bytes = Encoding. GetBytes (Cutstr.substring (i, 1));                 if (bytes. Length = = 2)//not English                      Aequilatelength + = 2;                 Else                      aequilatelength++;

if (aequilatelength <= len) cutlength + = 1;

if (Aequilatelength > Len) return cutstr.substring (0, cutlength);//+ "..."}         return cutstr; }

}

C # Mixed string interception in Chinese and English