asp.net template engine Razor Call external Method Usage Instance _ Practical Tips

This example describes the ASP.net template engine razor calling external method usage. Share to everyone for your reference. Specifically as follows:

First use the razor steps: Read cshtml, parse cshtml and specify CacheName.

And this step is repetitive, in order to follow the dry principle, encapsulate this code as a Razorhelper () method

public class Razorhelper
{public
  static string Parserazor (HttpContext context, String Cshtmlvirtualpath, Object Model
  {
   string fullpath = context. Server.MapPath (Cshtmlvirtualpath);
   String cshtml = File.readalltext (fullpath);
   String cachename = FullPath + file.getlastwritetime (fullpath);
   String html = Razor.parse (cshtml,model,cachename);
   return html;
  }

How to call an external method with razor in cshtml

1. The namespace of the class where Test1 and Test2 are referenced first in the cshtml file

@using webtest1.razordemo;<!--Test1 and test2 the namespace of the class-->
<! DOCTYPE html>
 
 

2. Call Razorhelper.parserazor () in a generic handler to return the read cshtml file to the customer

public void ProcessRequest (HttpContext context)
{context
 . Response.ContentType = "text/html";
 String html = Razorhelper.parserazor (context, @ "~/razordemo/razor2.cshtml", null);
 Context. Response.Write (HTML); 

Why would you call a method in a cshtml file?

First look at a tedious, insert the checkbox in the cshtml processing

1. General processing procedures

BOOL gender = true;
String html = Razorhelper.parserazor (context, @ "~/razordemo/razor2.cshtml", new {Gender = Gender});

2. cshtml the checked state of the checkbox in the file

<input type= "checkbox" @ (Model.gender?) Checked ":" ")/>
<!--parentheses change the precedence, otherwise the compiler will treat the expression following the point model as a string-->

Is it messy? Virgo cannot endure.

We know that methods can encapsulate some repetitive code and invoke methods to make cshtml pages more concise.

As an example:

To insert a checkbox on the cshtml page.

1. First encapsulate a checkbox () method

public static rawstring CheckBox (string name, string ID, bool ischecked)
{
 StringBuilder sb = new StringBuilder ();
 sb. Append ("<input type= ' checkbox ' id= ')". Append (ID). Append ("'"). Append ("Name= '"). Append (name). Append ("'");
 if (ischecked)
 {
 sb. Append ("checked");
 }
 Sb. Append ("/>");
 Return to New Rawstring (sb.) ToString ());
}

2. Read and parse cshtml files in general handlers

String html = Razorhelper.parserazor (context, @ "~/razordemo/razor2.cshtml", null);
Context. Response.Write (HTML);

3. Call the checkbox () method in the Cshtml file to insert the checkbox into the cshtml

@using webtest1.razordemo;<!--Test1 and test2 the namespace of the class-->
<! DOCTYPE html>
 
 

I hope this article will help you with the ASP.net program design.