返回字符串并用省略号代替超过限定字数的字符

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 #region 返回字符串并用省略号代替超过限定字数的字符
        /// <summary>
        /// 返回字符串并用省略号代替超过限定字数的字符
        /// </summary>
        /// <param name="outString">输入的字符串</param>
        /// <param name="strSize">输出的字符个数(不是字符串长度)</param>
        /// <param name="proLong">True,用省略号代替</param>
        /// <returns></returns>
        private static string MakeOutString(string inStr, int strSize, bool proLong)
        {
            byte[] MyByte = Encoding.Default.GetBytes(inStr);    //将输入的字符串InString读到MyByte字节数组中
            //获取字符个数(MyByte.Length)并与输出的字符个数比较
            if (MyByte.Length > strSize)
            {
                outStr = new StringBuilder();
                for (int i = 0; i < inStr.Length; i++)
                {
                    byte[] TempByte = Encoding.Default.GetBytes(outStr.ToString());
                    if (TempByte.Length < strSize * 2)
                    {
                        outStr.Append(inStr.Substring(i, 1));
                    }
                    else
                    {
                        if (proLong)
                        {
                            outStr.Append("...");
                        }
                        break;
                    }
                }
                return outStr.ToString();
            }
            else
            {
                return inStr;
            }
        }
        #endregion

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