Libs/MojoCube.Api/Text/Content.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI;
using System.Configuration;
using System.Web;

namespace MojoCube.Api.Text
{
    public class Content
    {
        /// <summary>
        /// Ssubstring截取HTML字符
        /// </summary>
        /// <param name="content">要截取的内容</param>
        /// <param name="length">要截取的长度</param>
        /// <param name="StripHTML">是否拿掉HTML</param>
        public static string GetContentSummary(string content, int length, bool StripHTML)
        {
            if (string.IsNullOrEmpty(content) || length == 0)
                return "";
            if (StripHTML)
            {
                System.Text.RegularExpressions.Regex re = new System.Text.RegularExpressions.Regex("<[^>]*>");
                content = re.Replace(content, "");
                content = content.Replace("　", "").Replace(" ", "").Replace("&nbsp;", "");
                if (content.Length <= length)
                    return content;
                else
                    return content.Substring(0, length) + "...";
            }
            else
            {
                if (content.Length <= length)
                    return content;

                int pos = 0, npos = 0, size = 0;
                bool firststop = false, notr = false, noli = false;
                System.Text.StringBuilder sb = new System.Text.StringBuilder();
                while (true)
                {
                    if (pos >= content.Length)
                        break;
                    string cur = content.Substring(pos, 1);
                    if (cur == "<")
                    {
                        string next = content.Substring(pos + 1, 3).ToLower();
                        if (next.IndexOf("p") == 0 && next.IndexOf("pre") != 0)
                        {
                            npos = content.IndexOf(">", pos) + 1;
                        }
                        else if (next.IndexOf("/p") == 0 && next.IndexOf("/pr") != 0)
                        {
                            npos = content.IndexOf(">", pos) + 1;
                            if (size < length)
                                sb.Append("<br />");
                        }
                        else if (next.IndexOf("br") == 0)
                        {
                            npos = content.IndexOf(">", pos) + 1;