ASP .NET Core : Directory.EnumerateFiles and IIS hosting - iis

Question

When I publish my ASP .NET Core (v.2.2) web application on a IIS-server it throws an exception on this line:
Directory.EnumerateFiles(_environment.ContentRootPath + #"/Pages/API")
The exception:
An unhandled exception has occurred while executing the request.
Could not find a part of the path 'C:\Release\MySite\Pages\API'.
System.IO.DirectoryNotFoundException at
System.IO.Enumeration.FileSystemEnumerator`1.CreateDirectoryHandle(String
path, Boolean ignoreNotFound)
When I look inside the published folder there is no API folder, but should it not be inside of my website dll? Or can I not use relative or absolute paths to find files in my web project when I publish it on ISS?
Note: The pages in folder API have Build Action : content, and the code works without problem in development (with IIS-express).

Answer 1

For asp.net core, it will precompile views while publishing into Project.Views.dll. For Directory.EnumerateFiles, it only lists the real exist files in the disk.
For a solution, try to modify your project.csproj to add <MvcRazorCompileOnPublish>false</MvcRazorCompileOnPublish>.
Full
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp2.2</TargetFramework>
<AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
<MvcRazorCompileOnPublish>false</MvcRazorCompileOnPublish>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.App" />
<PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.2.0" PrivateAssets="All" />
<PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.2.0" />
</ItemGroup>
</Project>