Migrating legacy systems to. Net Core 2.0 Diaries (7) Tag Helpers

Tag Helpers is a replacement for HTML helpers

For example, the original view model definition is this:

@using (Html.BeginForm ("Register"," Account", FormMethod.Post,New{@class ="Form-horizontal", role ="form"}) {@Html. AntiForgeryToken ()NewAccount.@Html. ValidationSummary (true,"",New{@class ="Text-danger" })    <divclass="Form-group">@Html. labelfor (M= M.username,New{@class ="col-md-2 Control-label" })        <divclass="col-md-10">@Html. textboxfor (M= M.username,New{@class ="Form-control" })        </div> </div>

In the new version of MVC, we can use tag helper to define:

<form asp-controller=" Account"asp-action="Register"Method="Post" class="Form-horizontal"role="form"> Newaccount."validationsummary.modelonly" class="Text-danger"></div> <divclass="Form-group"> <label asp- for="UserName" class="col-md-2 Control-label"></label> <divclass="col-md-10"> <input asp- for="UserName" class="Form-control"/> <span asp-validation- for="UserName" class="Text-danger"></span> </div> </div>

This is handy for front-end developers, but I have no sense because I am full Stack Develop

If you want to use it, you can refer to this article: http://www.cnblogs.com/TomXu/p/4496480.html

Now there is no outputcache attribute, instead of Microsoft.AspNetCore.ResponseCaching.

[Responsecache (VaryByHeader ="accept-encoding")]  Public Iactionresult About () {}

If you want to use Varybyquerykeys, to first refer to the cache middleware, otherwise it will error InvalidOperationException: ' Varybyquerykeys ' requires the response cache Middleware.

Modify Startup.cs , add the following code to the Configureservices and configure two methods:

 Public class startup{...       Public void configureservices (iservicecollection services)    {        services. Addresponsecaching ();                ...    }       Public void Configure (Iapplicationbuilder app, Iloggerfactory loggerfactory)    {        app. Useresponsecaching ();                ...    }}

Migrating legacy systems to. Net Core 2.0 Diaries (7) Tag Helpers