学步园

string  encodeStr = System.Convert.ToBase64String(buf);
int subCount = encodeStr.Length/76 + 1;
     string[] temp = new string[subCount];
     for(int i=0;i<subCount;i++)
     {
      if (i==subCount-1)
      {
       temp[i] = SGIP_EncodeStr.Substring(i*76,SGIP_EncodeStr.Length-i*76) + "\n";
      }
      else
      {
       temp[i] = SGIP_EncodeStr.Substring(i*76,76) + "\n";
      }
     }
     encodeStr = string.Join("",temp);