T4 Template and Server.MapPath

Question

I am trying to get the folder names inside the Views folder using the T4 template and it continues to give me the following errors:

Error 3 Compilation of conversion: the name "Server" does not exist in the current context c: \ Projects \ LearningASPMVC \ LearningASPMVCSolution \ LearningMVC \ StronglyTypedViews.tt 20 47
Error 4 There are no immediate elements in the namespace, such as fields or methods C: \ Projects \ LearningASPMVC \ LearningASPMVCSolution \ LearningMVC \ StronglyTypedViews.cs 1 1 LearningMVC

Here is the T4 template:

<#@ template language="C#" debug="True" hostspecific="True" #>
<#@ output extension=".cs" #>

<#@ assembly name="System.Web" #>

<#@ import namespace="System.IO" #>
<#@ import namespace="System.Web" #>


using System; 



namespace StronglyTypedViews 
{

    <# 

     string[] folders = Directory.GetDirectories(Server.MapPath("Views")); 

     foreach(string folderName in folders) 
     {

     #>  

     public static class <#= folderName #> { } 


     <# } #>        

}

UPDATE: it works using the physical path:

<#@ template language="C#" debug="True" hostspecific="True" #>
<#@ output extension=".cs" #>

<#@ assembly name="System.Web" #>
<#@ assembly name="System.Web.Mvc" #>


<#@ import namespace="System.Web.Mvc" #>
<#@ import namespace="System.IO" #>
<#@ import namespace="System.Web" #>


using System; 

namespace StronglyTypedViews 
{

    <# 

     string viewsFolderPath = @"C:\Projects\LearningASPMVC\LearningASPMVCSolution\LearningMVC\"; 

     string[] folders = Directory.GetDirectories(viewsFolderPath + "Views");


     foreach(string folderName in folders) 
     {

     #> 

     public static class <#= System.IO.Path.GetFileName(folderName) #> {         
     <#      
      foreach(string file in Directory.GetFiles(folderName))      {
         #>          
         public const string <#= System.IO.Path.GetFileNameWithoutExtension(file) #> = "<#= System.IO.Path.GetFileNameWithoutExtension(file).ToString()  #>";

     <# } #>



     <#  } #>

     }




}

Answer 1

T4 , , -. . -, -, . System.Web.HttpContext MapPath() .

Environment.CurrentDirectory , .

? , . hosts < # @template # > Host ResolvePath(). ResolvePath TT.

(example.tt):

<#@ template language="C#" hostspecific="True" #>
<#@ output extension=".cs" #>
// <#=Host.ResolvePath(".")#>

(example.cs):

// C:\Users\myusername\Documents\Visual Studio 2008\Projects\MvcApplication1\MvcApplication1\.

hostpecific.