Notes on converting Roadkill wiki (MVC 3/4) to .net core (MVC 6)

converting-to-net-core.md

• RedirectToRouteResult is now RedirectToActionResult, with an ActionName property

• No System.Runtime.Caching - replace it with IMemoryCache (Microsoft.Extensions.Caching.Memory)

• typeof(x).Assembly is now typeof(x).GetTypeInfo().Assembly

• MongoCollection has changed

• StringComparison.InvariantCultureIgnoreCase is gone, easy replacement

• Configuration + Sections are totally different

• HttpContext and HttpRequest etc. now found in Microsoft.AspNetCore.Http.Abstractions - Microsoft.AspNetCore.Http.HttpRequest

• Request.RequestUri is now various new properties, for example Request.Host (a HostString)

• WebActivatorEx?

• DependencyResolver?

• System.Net.Mail - Mailkit instead

• MvcHtmlString/HtmlString - Microsoft.AspNetCore.Html.Abstractions

  • ToHtmlString() is now .Value

• HtmlHelper -> IHtmlHelper in Microsoft.AspNetCore.Mvc.ViewFeatures package

  • this return IHtmlContent not HtmlString
  • Use StringHtmlcontent for this
  • HtmlHelper still exists

• Encoding.Default is gone. Use UTF8 or Unicode

• htmlhelper.ViewContext.Controller is gone, can't find a way around it.

• I replaced UrlHelper with IUrlHelper

• HttpResponse (Microsoft.AspNetCore.Http) has no Cache property anymore

  • Solution appears to be https://docs.microsoft.com/en-us/aspnet/core/performance/caching/middleware

• Transferring models between actions (preserving ViewData)- no longer seems to work using an Attribute?

• JsonRequestBehavior.AllowGet is gone

• CacheContentType attribute is gone

• OnActionExecuting is now public

• Localization new technique - https://docs.microsoft.com/en-us/aspnet/core/fundamentals/localization

  • services.AddLocalization(options => options.ResourcesPath = "Resources");

• [ValidateInput] and request validation is gone - aspnet/Mvc#324

• [HandleError] is gone

• Json(obj, JsonRequestBehavior.AllowGet) - JsonRequestBehavior.AllowGet is gone

• HttpStatusCodeResult is now StatusCodeResult

• return Javascript() is gone, use Content("js here", "text/javascript")

• HttpUtility is now System.Net.WebUtility

• Request.QueryString["Key"] is now Request.Query:

if (Request.Query.ContainsKey("ReturnUrl"))
{
  StringValues values;
  if (Request.Query.TryGetValue("ReturnUrl", out values))
  {
    string firstValue = values[0].ToLower();

    if (firstValue.Contains("/filemanager/select") || firstValue.Contains("/help"))
    {
      return View("BlankLogin");
    }
  }

• Areas have changed completely: https://docs.microsoft.com/en-us/aspnet/core/mvc/controllers/areas

• IgnoreRoutes() has gone - https://stackoverflow.com/questions/39517816/how-to-ignore-routes-in-asp-net-core-1-0-1

• Microsoft.AspNetCore.Routing.Route isn't compatible with System.Web.Routing.Route. Is it the right class?

• RazorViewEngine is gone, closest I can find is Microsoft.AspNetCore.Razor.RazorTemplateEngine

• Bundles, where have they gone? Doesn't matter to me as Gulp is better

• SelectListItem is now in Microsoft.AspNetCore.Mvc.Rendering;

• HttpContext.Current is gone, good riddance. See https://stackoverflow.com/questions/38571032/how-to-get-httpcontext-current-in-asp-net-core

• WebApi AuthorizeAttribute has changed, no more OnAuthorization

• [RoutePrefix] is now [Route]

• ApiController is now gone, use ControllerBase

• WebViewPage is now RazorPage, and it's in Microsoft.AspNetCore.Mvc.Razor (not Microsoft.AspNetCore.Razor)

• Middleware has changed since the Owin namespace: https://docs.microsoft.com/en-us/aspnet/core/fundamentals/middleware

• HttpFileCollectionBase is now an enumerable of IFormFile and has CopyTo instead of SaveAs()

• Char.ToString() no longer takes a culture

• UrlHelper now has an interface and factory:

var urlHelperFactory = _httpContext.RequestServices.GetService<IUrlHelperFactory>();
var actionAccessor = _httpContext.RequestServices.GetService<IActionContextAccessor>();
IUrlHelper urlHelper = urlHelperFactory.GetUrlHelper(actionAccessor.ActionContext);

• Structuremap HybridAnd... is now a package? Maybe StructureMap.Microsoft.DependencyInjection handles it
• OAuth2 is middleware now: https://docs.microsoft.com/en-us/aspnet/core/security/authentication/social/
• Packages are microsoft.aspnetcore.authentication e.g. microsoft.aspnetcore.authentication.google`

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