字符超出显示长度，用省略号代替的代码

//RawString 为文本内容  Length为只准显示多长字符

 public static string getString(string RawString, Int32 Length)
        {
            if (RawString.Length <= Length)
            {
                return RawString;
            }
            else
            {
                for (Int32 i = RawString.Length - 1; i >= 0; i--)
                {
                    if (System.Text.Encoding.GetEncoding("GB2312").GetByteCount(RawString.Substring(0, i)) < Length)
                    {
                        return RawString.Substring(0, i) + "...";
                    }
                }
                return "...";
            }
        }