Referrer

This part contains tools for working with HTTP referrer and other related things. Typical use-case of such tools is, for example, specifying of redirect back to entity's details form from edit form is needed after pressing "Ok" button or "Cancel" button.

Controller extensions

Method name	Return type	Description
RedirectToReferrer	RedirectResult	Creates RedirectResult object specifying redirect to url depending on presence __Referrer key (specified in ReferrerConstants.Key) in HttpRequest.Form. In case of existing of such key the corresponding url from From value will be used to redirect to. In other case the provided url parameter will be used.

HttpRequest extensions

Method name	Return type	Description
GetReferrer	string	Gets a string containing url gotten from HttpRequest.Form with __Referrer key. If there are no such key then the specified url will be returned instead.

ReferrerTagHelper

An TagHelper implementation adding referrer link to page. It could be helpful when, for example, redirect back to entity's details form from edit form is needed after pressing "Ok" button or "Cancel" button.

<a asp-referrer="@referrerAddress" class="btn btn-link btn-cancel">Cancel</a>

This will be (depending on context and app structure) rendered into something like:

<a class="btn btn-link btn-cancel" href="/admin/users/7">Cancel</a>
<input name="__Referrer" type="hidden" value="/admin/users/7"/>