1.简单替换
##这是注释
Wellcome ${userName}! Now:$date

2.申明变量：
#set( $iAmVariable = "good!" )
Welcome $name to Javayou.com!
today is $date.
$iAmVariable

3.if语句：
#set ($admin = "admin")
#set ($user = "user")
#if ($admin == $user)
Welcome admin!
#else
Welcome user!
#end

4.遍历对象：
#foreach( $product in $list )
<li>$product</li>
#end

5.自定义对象：
#foreach( $s in $students )
<$velocityCount> No:$s.No, Address: $s.Address

#end

6.标签嵌套：
#foreach ($element in $list) 
--外部循环-- 
    $velocityCount:This is $element.
--内部循环--
#foreach ($element in $list)
      $velocityCount：This is $element.
#end
--内部循环--
--外部循环--
#end

7.调用自定义对象方法：
#foreach( $s in $students )
<$velocityCount> $s.SayHello();

#end

using System.IO;
using NVelocity.App;
using NVelocity.Context;
using NVelocity.Runtime;namespace NVelocity
{/// <summary>///     NVelocity模板工具类 VelocityHelper/// </summary>public class VelocityHelper{private IContext _context;private VelocityEngine _velocity;private string _templateName;/// <summary>///     构造函数/// </summary>/// <param name="templatDir">模板文件夹路径</param>/// <param name="templateName">模板文件名</param>public VelocityHelper(string templatDir, string templateName){Init(templatDir);_templateName = templateName;}/// <summary>///     无参数构造函数/// </summary>public VelocityHelper(){}/// <summary>/// 设置模板文件夹/// </summary>/// <param name="templatDir"></param>public void SetTemplateDirPath(string templatDir){Init(templatDir);}/// <summary>/// 设置模板文件/// </summary>/// <param name="templateName"></param>public void SetTemplateFileName(string templateName){_templateName = templateName;}/// <summary>///     初始化NVelocity模块/// </summary>/// <param name="templatDir">模板文件夹路径</param>public void Init(string templatDir){//创建VelocityEngine实例对象并设置初始化VelocityEngine _velocity = new VelocityEngine();_velocity.SetProperty(RuntimeConstants_Fields.RESOURCE_LOADER, "file");_velocity.SetProperty(RuntimeConstants_Fields.FILE_RESOURCE_LOADER_PATH, templatDir);_velocity.SetProperty(RuntimeConstants_Fields.INPUT_ENCODING, "utf-8");_velocity.SetProperty(RuntimeConstants_Fields.OUTPUT_ENCODING, "utf-8");_velocity.Init();//为模板变量赋值_context = new VelocityContext();}/// <summary>///     给模板变量赋值/// </summary>/// <param name="key">模板变量</param>/// <param name="value">模板变量值</param>public void Put(string key, object value){if (_context == null){_context = new VelocityContext();}_context.Put(key, value);}/// <summary>///     渲染模板/// </summary> public string Render(){if (!string.IsNullOrEmpty(_templateName)){//从文件中读取模板Template template = _velocity.GetTemplate(_templateName);//合并模板var writer = new StringWriter();template.Merge(_context, writer);return writer.GetStringBuilder().ToString();}return "未指定模板文件!";}}
}

完整Demo下载： http://download.csdn.net/detail/a497785609/5405089

相关资料：

掌握一种 C#/.Net 模板技术 — Velocity：http://unmi.cc/csharp-velocity-templat

Velocity初体验 http://tech.163.com/04/1230/03/18QP3L080009159J.html

NVelocity介绍，NVelocity中文手册文档及实例下载 http://tommyhu.cn/NVelocity/