It is possible to use an HTMLHelper not only for an attribute value but instead for the name of the attribute?

Question

I want to generate depending on what I'm passing an specific attribute with his value. This is how I want to use the helper:

<sometag @PossibleHelper(parameter)/>

After PossibleHelper do his thing, this could be the result:

<sometag attributeName="attributeValue"/>

How can I express that in the helper?

@helper PossibleHelper(someType){

    if(condition){
      attributeName="attributeValue"      //this is wrong
    }
}

Answer 1

When you're in a helper it's just regular razor syntax.

@helper PossibleHelper(SomeType something) {
    if (condition) {
        <span attributeName="attributeValue">blah</span>
    }
}

You can set an attribute like this.

@helper PossibleHelper(int something) {
    var attrValue = string.Empty;
    if (true) {
        attrValue = "attributeValue";
    }
    @(string.Format("attribute={0}", attrValue))
}

Usage:

<sometag @PossibleHelper(parameter)/>

FYI, you can also make an extension method for HtmlHelper which may be better if the code is shared between views or there is a decent amount of logic.

public static class HtmlHelperExtensions
{
    public static MvcHtmlString SomeExtension(this HtmlHelper htmlHelper)
    {
        // ...
    }
}