Setting a Attribute without Value

I have a Attribute without a Value wich I’d like to set on a Element:

 element.SetAttribute("readonly", null);

how can I do this?

[FlorianRappl]

So answer to the question: There is no attribute “without” a value. Every attribute has a value.

element.SetAttribute("readonly", String.Empty);

is what you actually look for (at least that’s my opinion). The readonly (as an example) only cares about whether its available or not - not what value it has.

[FlorianRappl]

Yeah, as I said: The behavior comes from the JS to native transition and the cast to a string. We do not have the JavaScript types and our instance is already a (null) string. So writing “null” would not make sense to me. If you plug in a scripting engine then yes - you get the same behavior as expected from JS.

Similarly, using some arbitrary object in JavaScript will result in its string representation (e.g., [object Object] for a general one), but in C# you’ll get a type mismatch exception (if done via reflection; otherwise a compilation error occurs of course). So the exact JS behavior cannot be matched anyway.

Long story short: My aim is not to copy the behavior tied to JS, but the right behavior (i.e., the behavior as defined from the W3C - which is independent of the used language).

Back to the topic: I agree - this is mostly about aesthetics and the serialization of the DOM. So I would say everything is as it should be.