Yuebon.NetCore/Yuebon.Commons/Extend/ExtString.cs

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using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.RegularExpressions;

namespace Yuebon.Commons.Extend
{
    /// <summary>
    /// 字符串处理
    /// </summary>
    public static class ExtString
    {
        /// <summary>
        /// 过滤html格式
        /// </summary>
        /// <param name="Htmlstring"></param>
        /// <returns></returns>
        public static string NoHTML(this string Htmlstring)
        {
            Htmlstring = Regex.Replace(Htmlstring, @"<script[\s\S]*?</script>", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<noscript[\s\S]*?</noscript>", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<style[\s\S]*?</style>", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<.*?>", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", " ", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", " ", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"-->", " ", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", " ", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", "", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
            Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", " ", RegexOptions.IgnoreCase);
            return Htmlstring;
        }
        /// <summary>
        /// 用于微信小程序编辑页面，将json字符串解析成html格式
        /// </summary>
        /// <param name="Jsonstring"></param>
        /// <returns></returns>
        public static string YuebonEditorJsonToHtml(this string Jsonstring)
        {
            JArray jArray = JArray.Parse(Jsonstring);
            Jsonstring = string.Empty;
            foreach (var item in jArray)
            {
                JObject jdata = (JObject)item;
                string type = jdata["type"].ToString();
                switch (type)
                {
                    case "txt":
                        Jsonstring += string.Format("<p>{0}</p>", jdata["content"].ToString());
                        break;