显示文章前100字导致html乱码

Question

我的网站要添加一篇文章，添加后要在首页显示这篇文章的前100字。由于文章是通过fck添加的所以文章中会有很多html标记，当文章长度多于100字时首页显示的文章会将100字后的文字连同html标记一起截断，导致首页html标记不匹配。
有高手遇到过这个问题吗？？大侠们是怎么解决的？？

Answer 1

http://topic.csdn.net/u/20080829/14/458c71bb-3e9b-4a84-a1e5-8a66813ea208.html
看一下我在五楼的回复

Answer 2

把你的方法粘过来供大家分享
谢谢
public 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;
                            if (size < length)
                                sb.Append("<br />");
                        }
                        else if (next.IndexOf("img") == 0)
                        {
                            npos = content.IndexOf(">", pos) + 1;
                            if (size < length)
                            {
                                sb.Append(content.Substring(pos, npos - pos));
                                size += npos - pos + 1;
                            }
                        }
                        else if (next.IndexOf("li") == 0 || next.IndexOf("/li") == 0)
                        {
                            npos = content.IndexOf(">", pos) + 1;
                            if (size < length)
                            {
                                sb.Append(content.Substring(pos, npos - pos));
                            }
                            else
                            {
                                if (!noli && next.IndexOf("/li") == 0)
                                {
                                    sb.Append(content.Substring(pos, npos - pos));
                                    noli = true;
                                }
                            }
                        }
                        else if (next.IndexOf("tr") == 0 || next.IndexOf("/tr") == 0)
                        {
                            npos = content.IndexOf(">", pos) + 1;
                            if (size < length)
                            {
                                sb.Append(content.Substring(pos, npos - pos));
                            }
                            else
                            {
                                if (!notr && next.IndexOf("/tr") == 0)
                                {
                                    sb.Append(content.Substring(pos, npos - pos));
                                    notr = true;
                                }
                            }
                        }
                        else if (next.IndexOf("td") == 0 || next.IndexOf("/td") == 0)
                        {
                            npos = content.IndexOf(">", pos) + 1;
                            if (size < length)
                            {
                                sb.Append(content.Substring(pos, npos - pos));
                            }
                            else
                            {
                                if (!notr)
                                {
                                    sb.Append(content.Substring(pos, npos - pos));
                                }
                            }
                        }
                        else
                        {
                            npos = content.IndexOf(">", pos) + 1;
                            sb.Append(content.Substring(pos, npos - pos));
                        }
                        if (npos <= pos)
                            npos = pos + 1;
                        pos = npos;
                    }
                    else
                    {
                        if (size < length)
                        {
                            sb.Append(cur);
                            size++;
                        }
                        else
                        {
                            if (!firststop)
                            {
                                sb.Append("...");
                                firststop = true;
                            }
                        }
                        pos++;
                    }                }
                return sb.ToString();
            }
        }