使用NVelocity0.5实现服务器端页面自动生成

using NVelocity;
using NVelocity.App;
using NVelocity.Exception;
using NVelocity.Runtime;
using NVelocityTemplateEngine;
using NVelocityTemplateEngine.Interfaces;

        INVelocityEngine fileEngine;
        IDictionary context;

         /// <summary>
        /// 初始化NVelocity模板引擎并加载程序的配置信息ｅ
        /// </summary>
         protected  void InitTemplateEngine()
         {
            context = new Hashtable();
            string templateDirectory = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Articles");
            fileEngine = NVelocityEngineFactory.CreateNVelocityFileEngine(templateDirectory, true);
        }

         public  override  void Execute()
         {
            string message = string.Format("Create the Helper class file.");
            log.Debug(message);

            string sql = string.Format("select * from article ");
            if (!isCreateAll)
            {
                sql = string.Format("select * from article where generated =False ");
            }

            using (IDataReader reader = xConfig.ExecuteReader(sql))
            {
                while (reader.Read())
                {
                    PrepareClass(reader);
                    OutputFile();
                }
            }
            
            sql = "update article set generated =True ";
            if (!isCreateAll)
            {
                sql = "update article set generated =True  where generated =False ";
            }
            xConfig.ExecuteNonQuery(sql);
        }

         /// <summary>
        /// Prepares the class content.
        /// </summary>
         private  void PrepareClass(IDataReader reader)
         {
            FileNameOfOutput = string.Format("{0}#{1}", ((DateTime) reader["datetime"]).ToString("yyyy-MM-dd"), reader["id"].ToString());

            context.Clear();
            context.Add("id", reader["id"].ToString());
            context.Add("category", reader["category"].ToString());
            context.Add("title", reader["title"].ToString());
            context.Add("content", reader["content"].ToString());
            context.Add("datetime", reader["datetime"].ToString());
        }

         /// <summary>
        ///根据模板创建输出的文件
        /// </summary>
         public  virtual  void OutputFile()
         {
            if (fileEngine != null)
            {
                string filePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, directoryOfOutput);
                string fileName = Path.Combine(filePath, fileNameOfOutput + fileExtension);

                DirectoryInfo dir = new DirectoryInfo(filePath);
                if (!dir.Exists)
                {
                    dir.Create();
                }
                
                log.Debug(string.Format("Class file output path:{0}", fileName));
                using (StreamWriter writer = new StreamWriter(fileName, false))
                {
                    fileEngine.Process(context, writer, this.templateFile);
                }
            }
        }

             string template =  " page.htm ";
             try
             {
                HelperClassAdapter helper = new HelperClassAdapter(template, false);
                helper.Execute();
                Response.Write("<script>alert('生成成功');</script>");
            }
             catch(Exception ex)
             {
                Helper.ShowError(this, ex, false);
                return;
            }

< HTML >
< HEAD >
< TITLE >$title </ TITLE >
< META  http-equiv =Content-Type  content ="text/html; charset=UTF-8" >
< META  content ="$title"  name =description >
< META  content ="$title"  name =keywords >
     </ HEAD >
     < BODY >
       < strong  class ="style3" >$title </ strong ></ h2 >
       < div > $content  </ div >
       < hr  width ="98%" />
       < div  align ="right" >$datetime </ div >
     </ BODY >
</ HTML >