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步步为营-69-Razor基础

作用:进一步将HTML代码和C#代码进行解耦

1.1 引用程序集(RazorEngine.dll,System.Web.Razor.dll)

　　1.1.1 可以从http://razorengine.codeplex.com/ 上下载

　　1.1.2 也可以NuGet程序包安装(建议使用第一种,因为这个安装完成后只有System.Web.Razor.dll这一个，)

1.2 Parse的使用

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    姓名: <b>@Model.Name</b>
    <!--姓名2: <b>@Model.Name</b>-->
 　
    </br>
   年龄：<b>@Model.Age</b> 
  
</body>
</html>

html

using RazorEngine;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Razor;
namespace _04_RazorTest
{
    /// <summary>
    /// _01_Parse的使用 的摘要说明
    /// </summary>
    public class _01_Parse的使用 : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/html";
            //01获取要想要使用的HTML
            string html = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory+"01-Parse的使用.html");
           
            html = Razor.Parse(html, new { Name="张三",Age =12});
            context.Response.Write(html);
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

ashx

1.3 通过Razor还可以直接在html中写C#代码

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
  @{
    for(int  i=0;i<Model;i++){
        if(i%2==0)
        {
             <b>@i</b>                    
        }
    }

    }  
</body>
</html>

html

using RazorEngine;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Razor;
namespace _04_RazorTest
{
    /// <summary>
    /// _01_Parse的使用 的摘要说明
    /// </summary>
    public class _02_Parse的使用_2 : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/html";
            //01获取要想要使用的HTML
            string html = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory+"02-Parse的使用-2.html");
           
            html = Razor.Parse(html, 100);
            context.Response.Write(html);
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

ashx

1.4 类似母版页

using RazorEngine;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;

namespace _04_RazorTest
{
    /// <summary>
    /// _03_类似母版页 的摘要说明
    /// </summary>
    public class _03_类似母版页 : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/html";
            //01 获取HTML页
            string html = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory+"03-类似母版页.html");
            string top = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory+"03-Top.html");
            //02 编译 替换
            Razor.Compile( top,"Top");
            //03 必须先Compile,再Parse
           html= Razor.Parse(html, new {Name = "张三" });
            context.Response.Write(html);
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

ashx

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    @Include("Top")
    <hr />
    姓名: <b>@Model.Name</b>
</body>
</html>

03-类似母版页.html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <b>这是标题行</b>
</body>
</html>

Top.html

1.5 对Razor的封装

1.5.1 正常不使用Razor的代码实现

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <table >
        <thead><th>新闻</th><th>类型</th></thead>
        $content
    </table>
</body>
</html>

html

using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;

namespace _03_新闻
{
    /// <summary>
    /// NewsIndex 的摘要说明
    /// </summary>
    public class NewsIndex : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/html";
            string sql = "select * from TypeInfo";
            DataTable dt = SqlHelper.ExecuteTable(sql);
            int count = dt.Rows.Count;
            StringBuilder sb = new StringBuilder();
            if (count > 0)
            {               
                foreach (DataRow dr in dt.Rows)
                {
                    sb.Append("<tr>");
                    sb.Append("<td>");
                    sb.Append(dr["TypeTitle"]);
                    sb.Append("</td>");
                    sb.Append("<td>");
                    sb.Append(dr["TypeParentId"]);
                    sb.Append("</td>");
                    sb.Append("</tr>");
                }                
            }
            else {
                sb.Append("<tr>");
                sb.Append("<td>");                 
                sb.Append("没有数据");
                sb.Append("</td>");
                sb.Append("</tr>");
            }

            string html = File.ReadAllText(Path.Combine(AppDomain.CurrentDomain.BaseDirectory,"NewsIndex.html"));
            html = html.Replace("$content",sb.ToString());
            context.Response.Write(html);
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

ashx

1.5.2 通过Razor的代码实现

1.5.2.1 封装RazorHelper类

using RazorEngine;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Web;

namespace _03_新闻
{
    public static class RazorHelper
    {
        #region 01 渲染
        public static void Render(string modelName ,object obj,params IncludeType[] ps)
        {
            
            #region 01Compile
            //01-01 首先进行Compile                 -- Razor.Compile(top,"Top");
            //--需要两个参数,所以封装一个内部类,
            //--由于传递来的个数不确定,所以使用params
            if (ps.Length > 0)
            {
                int count = ps.Length;
                for (int i = 0; i < count; i++)
                {
                    IncludeType t1 = ps[i];
                    string temp;
                    //确定是文件
                    if (t1.IsFile)
                    {
                        temp = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory + "View\" + t1.Content);
                    }
                    else
                    {
                        temp = t1.Content;
                    }
                    //关键一步
                    Razor.Compile(temp, t1.Title);
                }
            } 
            #endregion
           
            #region 02 Parse
            // html= Razor.Parse(html, new {Name = "张三" });
            string html = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory+"View\"+modelName);
            html = Razor.Parse(html,obj);
          
            #endregion

            #region 03 输出响应流
            HttpContext.Current.Response.Write(html);
            #endregion
        } 
        #endregion
        #region 02 定义一个母版页的类型
        /// <summary>
        /// 定义一个母版页的类型 Razor.Compile(Content,Title)时候用
        /// </summary>
        public class IncludeType
        {
            //02-01 定义标题Razor.Compile(Content,Title);
            public string Title { get; set; }
            //02-02 定义内容
            public string Content { get; set; }
            //02-03 定义是否是文件(文件,字符串)
            public bool IsFile { get; set; }

        } 
        #endregion
    }
}

RazorHelper

<!DOCTYPE html>
@using System.Data;
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <table>
        <thead>
        <th>新闻</th>
        <th>类型</th>
        </thead>
        @{
           DataTable dt = Model as DataTable; <!--这一句代码很重要-->
           if(dt.Rows.Count >0){
                int count = dt.Rows.Count;
                for(int i=0;i<count;i++) 
               {
                <tr>
                    <td> @dt.Rows[i]["TypeTitle"]</td>              
                    <td>@dt.Rows[i]["TypeParentId"]</td>
                </tr>
                }

            }else
            {
            <tr>
                <td>没有数据,</td>
            </tr>
            }
        }
</table>
</body>
</html>

html

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;

namespace _03_新闻
{
    /// <summary>
    /// NewsRazor 的摘要说明
    /// </summary>
    public class NewsRazor : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
             context.Response.ContentType = "text/html";
            string sql = "select * from TypeInfo";
            DataTable dt = SqlHelper.ExecuteTable(sql);
            int count = dt.Rows.Count;
            RazorHelper.Render("ModelNewsShow.html", dt);
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

NewsRazor

1.5.2.2 进一步完善--母版页

　　只需要改3处

　　01-添加Top页面

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <a href="#">添加</a>
    &nbsp;    &nbsp;    &nbsp;    &nbsp;
    <a href="#">修改</a>
</body>
</html>

Top.html

　　02- 修改html页面　　

<!DOCTYPE html>
@using System.Data;
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    @Include("Top")
    <br />
    <table>
        <thead>
        <th>新闻</th>
        <th>类型</th>
        </thead>
        @{
           DataTable dt = Model as DataTable; <!--这一句代码很重要-->
           if(dt.Rows.Count >0){
                int count = dt.Rows.Count;
                for(int i=0;i<count;i++) 
               {
                <tr>
                    <td> @dt.Rows[i]["TypeTitle"]</td>              
                    <td>@dt.Rows[i]["TypeParentId"]</td>
                </tr>
                }

            }else
            {
            <tr>
                <td>没有数据,</td>
            </tr>
            }
        }
</table>
</body>
</html>

html

　　@Include("Top")

　　03-修改NewRazor.ashx调用处

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;

namespace _03_新闻
{
    /// <summary>
    /// NewsRazor 的摘要说明
    /// </summary>
    public class NewsRazor : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
             context.Response.ContentType = "text/html";
            string sql = "select * from TypeInfo";
            DataTable dt = SqlHelper.ExecuteTable(sql);
            //int count = dt.Rows.Count;
            RazorHelper.Render("ModelNewsShow.html", dt, new RazorHelper.IncludeType { Title ="Top",Content="Top.html",IsFile = true});
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

NewsRazor

　　RazorHelper.Render("ModelNewsShow.html", dt, new RazorHelper.IncludeType { Title ="Top",Content="Top.html",IsFile = true});
　　

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原文地址：https://www.cnblogs.com/YK2012/p/6994830.html