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@addTagHelper *, TagHelperSuite

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<form asp-page-handler="Post">
    <link-button>Test Link</link-button>
</form>

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<asp:LinkButton ID="lbtnSubmit" runat="server" PostBackUrl="~/About.aspx" Text="Submit Form" />

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<form method="post">
    <button asp-page="/Index" asp-page-handler="Post">Submit Form</button>
</form>

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public class IndexModel : PageModel
{
    public void OnGet()
    {
    }

    public void OnPost()
    {
    }
}

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[HtmlTargetElement("link-button")]
public class LinkButtonTagHelper : TagHelper
{
    public override void Process(TagHelperContext context, TagHelperOutput output)
    {
        const string HIDDEN_FIELD_ID = "form_marker";

        output.TagName = "a";
        output.Attributes.SetAttribute("onclick",
            $@"document.getElementById(""{HIDDEN_FIELD_ID}"").form.submit();");

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// Fetch the context, so that we can add the Card object to the Cards collection
var handContext = (HandContext)context.Items[typeof(HandTagHelper)];
handContext.Cards.Add(new Card { Rank = rank, Suit = suit });

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public class HandContext
{
    public List<Card> Cards { get; set; } = new List<Card>();
}

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@model TagHelpersDemo.Views.Shared.Partials.CardViewModel

<img src="images/@(Model.PlayerName).png" alt="avatar" class="center-block" />
<div class="text-center">
    <h2 class="@Model.SuitColorClass">
        <strong>@Html.Raw(Model.SuitCharacterCode)</strong>
    </h2>
    <p>@Model.Rank</p>
</div>

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var content = await _html.PartialAsync("~/Views/Shared/Partials/_Card.cshtml", model);
output.Content.SetHtmlContent(content);