使用NVelocity模板引擎生成HTML

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using NVelocity.App;
using NVelocity;
using NVelocity.Runtime;
using System.Data;
using System.Text;
using System.IO;
using System.Xml;
using System.Configuration;
using System.Web.Script.Serialization;
using System.Reflection;
using DAL;

namespace SSOSite
{
    /// <summary>
    /// Common工具類
    /// </summary>
    public class CommonHelper
    {
        /// <summary>
        /// 使用模板引擎,傳回 html 文本:單一物件Context,Data        
        /// </summary>
        /// <param name="templateName">模板文件.html</param>
        /// <param name="data">物件1</param>
        /// <returns></returns>
        public static string RenderHtml(string templateName, object data)

        {
            VelocityEngine vltEngine = new VelocityEngine();
            vltEngine.SetProperty(RuntimeConstants.RESOURCE_LOADER, "file");
            //模板文件所在的文件夹
            vltEngine.SetProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, System.Web.Hosting.HostingEnvironment.MapPath("~/templates"));
            vltEngine.Init();

            VelocityContext vltContext = new VelocityContext();
            vltContext.Put("Data", data);//设置参数，在模板中可以通过$Data来引用

            Template vltTemplate = vltEngine.GetTemplate(templateName);
            System.IO.StringWriter vltWriter = new System.IO.StringWriter();
            vltTemplate.Merge(vltContext, vltWriter);

            string html = vltWriter.GetStringBuilder().ToString();
            return html;
        }

        /// <summary>
        /// 使用模板引擎,傳回 html 文本:兩個物件Context Chaining;Data1,Data2
        /// Ex:object若傳入datable需傳入dt.Rows
        /// </summary>
        /// <param name="templateName"></param>
        /// <param name="data1">物件1</param>
        /// <param name="data2">物件2</param>
        /// <returns></returns>
        public static string RenderHtml(string templateName, object data1, object data2)
        {
            VelocityEngine vltEngine = new VelocityEngine();
            vltEngine.SetProperty(RuntimeConstants.RESOURCE_LOADER, "file");