c#截取指定长度中英文字符串方法

最新推荐文章于 2025-08-31 17:56:17 发布

YANGZHONGBAO411

最新推荐文章于 2025-08-31 17:56:17 发布

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文章标签： c#

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public static string GetFirstString(string stringToSub, int length)
        {
            Regex regex = new Regex("[/u4e00-/u9fa5]+", RegexOptions.Compiled);
            char[] stringChar = stringToSub.ToCharArray();
            StringBuilder sb = new StringBuilder();
            int nLength = 0;
            bool isCut=false;
            for(int i = 0; i < stringChar.Length; i++)
            {
                if (regex.IsMatch((stringChar[i]).ToString()))
                {
                    sb.Append(stringChar[i]);
                    nLength += 2;
                }
                else
                {
                    sb.Append(stringChar[i]);
                    nLength = nLength + 1;
               }

                if (nLength > length)
                {
                    isCut=true;
                    break;
                }
            }
            if(isCut)
                return sb.ToString()+"..";
            else
                return sb.ToString();
        }