性能优化——生成静态页面（二）

当整个页面静态化的时候可以使用流的方式，但是如果局部页面生成静态页面的话就可以使用模板的形式了。

使用模板页面生成静态页面思路：使用DW之类的工具生成一个静态页面模板。读取模板，然后对立面的特殊标记使用真实的数据替换掉，并生成一个html文件

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Xml;

namespace ConsoleApplication1
{
    public abstract class ConvertToHtml
    {
        private string fileName;
        private string savePath;
        public string FileName { set; get; }
        public string SavePath { set; get; }

        /// <summary>
        /// 生成静态页面抽象方法
        /// </summary>
        /// <param name="param"></param>
        /// <returns></returns>
        public abstract bool CreateHtml(object param);

        /// <summary>
        /// 读取配置文件
        /// </summary>
        /// <param name="dirName">配置文件路径名</param>
        /// <param name="tag">配置文件中的表签名</param>
        /// <returns></returns>
        private int GetConfig(string dirName, string tag)
        {
            XmlDataDocument config = new XmlDataDocument();
            try
            {
                config.Load(dirName);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            XmlNodeList list = config.GetElementsByTagName(tag);
            return list.Count;
        }

        /// <summary>
        /// 生成静态页面
        /// </summary>
        /// <param name="configFileName">配置文件路径</param>
        /// <param name="configTag">配置文件标记</param>
        /// <param name="templateFile">模板文件路径</param>
        /// <param name="param"></param>
        public bool MakeHtml(string configFileName, string configTag, string templateFile, string[] param)
        {
            var saveFilePath = SavePath + "/" + fileName;
            if (File.Exists(saveFilePath))
            {
                DateTime dt = File.GetLastWriteTime(saveFilePath);
                TimeSpan ts = dt - DateTime.Now;
                if (ts.TotalHours < 1)
                    return true;
                else
                    DeleteHtml(saveFilePath);
            }

            int count = GetConfig(configFileName, configTag);
            string[] _replaceStr = new string[count];

            try
            {
                FileStream tFile = File.Open(templateFile, FileMode.Open, FileAccess.Read);
                StreamReader reader = new StreamReader(tFile, Encoding.GetEncoding("utf-8"));
                StringBuilder sb = new StringBuilder(reader.ReadToEnd());
                reader.Close();

                for (int i = 0; i < count; i++)
                {
                    sb.Replace("$replace[" + i + "]$", param[i]);
                }

                FileStream rFile = File.Create(SavePath + "/" + FileName);
                StreamWriter writer = new StreamWriter(rFile, Encoding.GetEncoding("utf-8"));
                writer.Write(sb.ToString());
                writer.Flush();
                writer.Close();
                return true;
            }
            catch (Exception ex) { throw ex; return false; }
        }

        /// <summary>
        /// 删除静态文件
        /// </summary>
        /// <param name="dirName"></param>
        public void DeleteHtml(string dirName)
        {
            File.Delete(dirName);
        }
    }

    public class CreateFilterHtml : ConvertToHtml
    {
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="saveUrl"></param>
        public CreateFilterHtml(string fileName, string saveUrl)
        {
            base.FileName = fileName + ".html";
            base.SavePath = saveUrl;
        }

        /// <summary>
        /// 重载方法
        /// </summary>
        /// <param name="param"></param>
        /// <returns></returns>
        public override bool CreateHtml(object param)
        {
            string[] paramvalue = param as string[];
            Console.WriteLine("dfsfkdjfk");
            var path = @"E:动态页面静态化ConsoleApplication1(模板的形式)ConsoleApplication1";
            var confilPath = path + "/config.xml";
            var tempPath = path + "/temp.html";
            return MakeHtml(confilPath, "article", tempPath, paramvalue);
        }


    }
}

 当使用的时候，需要建立相应的配置文件和模板文件，首先我们创建一个配置文件config.xml

<?xml version="1.0" encoding="utf-8" ?>
<htmlWeb version="1">
  <config>
    <article key="0" value="title"/>
    <article key="1" value="author"/>
    <article key="2" value="context"/>
    <article key="3" value="date"/>
  </config>
</htmlWeb>

 然后创建模板文件

<head>
    <title>模板文件</title>
</head>
<body>
    <h1>这是一个简单的HTML页，朋友们可以根据自己的需要重新设计</h1>
    <li>标题：$replace[0]$</li>
    <li>作者：$replace[1]$</li>
    <li>内容：$replace[2]$</li>
    <li>时间：$replace[3]$</li>
</body>

 使用方法为

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] param = new string[4];
            param[0] = "测试模板";
            param[1] = "农佳捷";
            param[2] = "这是一个测试文章";
            param[3] = "2007-10-30";

          ConvertToHtml createHtml = new CreateFilterHtml("text", @"D:	est");
            //单线程
            createHtml.MakeHtmlFilter(param);
            Console.ReadKey();

        }
    }
}

 此时就可以生成静态的html文件