An article about liquid template engine

background

Usually, for example, to develop a code generator, you usually set a template , Then there are many variables , Generate files based on data . At this time, the template engine comes in handy .

Let's introduce Liquid. What is? Liquid Well , It's like java、c# Like programming languages ,Liquid It is also an independent language , It doesn't make a big difference , The basic functions are . Dynamically generate files , You can output variables , Operation array, etc , These can achieve .

Official introduction

Liquid Is an open source template language , from Shopify Create and use Ruby Realization . It is Shopify The bones of the theme , And it is used to load the dynamic content of the store system .

Liquid  grammar

Liquid The code can be divided into   object （object）、 Mark （tag）  and   filter （filter）.

object

object   tell Liquid Where on the page is the content displayed . Object and variable names are identified by double curly braces ：{ {  and  }}.

Mark （tag）

Mark （tag）  Created the logic and control flow of the template . They are identified by a single bracket plus a percent sign ：{%  and  %}.

filter

filter   change Liquid Object output . They are used for output , Through one  |  symbols .

The original address  ：

https://github.com/Shopify/liquid

c# special Dot Liquid

Then based on c# Is there a corresponding one liquid Plugins , There are .Dot Liquid.

DotLiquid Compared with Mvc Default template engine Razor The benefits of a ：

Because there is no need to compile to the assembly and then load

The first rendering is fast

No memory leaks

Usage method

1、nuget install  using DotLiquid;

2、 Define the entity , Inherit : Drop Is the key

 public class DotLiquidMdDrop : Drop
    {
        private readonly Questions questions;

        public List<Answer> answer
        {
            get { return questions.Answer; }
        }

        public DotLiquidMdDrop(Questions questionsPara)
        {
            questions = questionsPara;
        }
    }

3、 Here we make some test data , And call

​​​​​​​

  [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult DotLiquidDemo1(string template)
{
            string test = GetInterIDList(template);
            ViewData["template"] = Template.Parse(test).Render(Hash.FromAnonymousObject(
                new
                {
                    questions = new List<DotLiquidMdDrop>() {
                      Getmork()
                      ,  Getmork()
                         ,  Getmork()
                     //  ,     new DotLiquidMdDrop(new Questions() { Answer =new List<Answer> () { new Answer() { option = "Aa", optiontext = " Options content 1111" }, new Answer() { option = "Aa", optiontext = " Options content 1111" } } })
                }
                }));
            return View();
        }