CODEWITHSUNDEEP
asp.netasp.net-mvcasp.net-core
alexb
alexb

Reputation: 277

Asp.Net Core 2.0 Mvc template processing failed: The types 'List<>' could not be found

Have an Asp.net core 1.1 Mvc app that I converted to 2.0 that includes a custom Templates/ folder. When I attempt to add a controller w EF actions, I get the following error:

Template processing failed...

I assume there are updated templates for core 2.0 but don't know where to find them.

Upvotes: 0

Views: 277

Answers (1)

Isma
Isma

Reputation: 15209

Make the following modifications:

Templates\ControllerGenerator\MvcControllerWithContext.cshtml

Add :

@using System.Collections.Generic;
@using System.Linq;

in addition of :

using System.Collections.Generic;
using System.Linq;

So the 'header' looks like :

@inherits Microsoft.VisualStudio.Web.CodeGeneration.Templating.RazorTemplateBase
@using System.Collections.Generic;
@using System.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.EntityFrameworkCore;

Templates\ViewGenerator\List.cshtml

Add :

@using System.Collections.Generic;
@using System.Linq;

so the 'header' looks like :

@inherits Microsoft.VisualStudio.Web.CodeGeneration.Templating.RazorTemplateBase
@using Microsoft.VisualStudio.Web.CodeGeneration.EntityFrameworkCore
@using System.Collections.Generic
@using System.Linq
@@model @GetEnumerableTypeExpression(Model.ViewDataTypeName)

Then make the following replacement :

IEnumerable<PropertyMetadata> var properties = Model.ModelMetadata.Properties;

Sources:

https://forums.asp.net/p/2128119/6164188.aspx?Re+Migration+1+1+to+2+0+Scaffold+multiple+problems

https://learn.microsoft.com/en-us/aspnet/core/migration/1x-to-2x/

Upvotes: 1

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