Create Custom HTML Helper in ASP.Net Core

Question

I want to create my own custom HTML Helper like the ones used in ASP.NET MVC, but I haven\'t been able to find how to implement them in the correct way.

I have found

Answer 1

Here is an example to get Enum name based on the Enum value in view. Custom HTML Helper for Enum Type

public static IHtmlContent DisplayEnumFor(this IHtmlHelper htmlHelper, string value, Type enumType)
{
    if (htmlHelper == null)
        throw new ArgumentNullException(nameof(htmlHelper));

    if (value == null)
        throw new ArgumentNullException(nameof(value));

    if (!enumType.IsEnum)
        throw new ArgumentException("Type must be an enumerated type");

    foreach (var item in Enum.GetValues(enumType))
        if (((int)item).ToString().Equals(value.Trim()))
            return new HtmlString(item.ToString());

    return new HtmlString(value);
}