Hi there - I'm using the default RegisterMember partial which renders a Textbox for all properties added to a member. I'd like to change one of these to a checkbox but haven't got the slightest clue how. There's a comment in the partial that tells me how I "can easily change it." Apparently by adding a custom view in

~/Views/Shared/EditorTemplates/

. I can sort of follow that - but I have no idea how they get from

@Html.EditorFor(m => registerModel.MemberProperties[i].Value)

to this output:

<input class="text-box single-line" id="registerModel_MemberProperties_3__Value" name="registerModel.MemberProperties[3].Value" type="text" value="">

(e.g. the '3' here is not sent in, so how does the view get this information?) - how am I supposed to "easily" do this? Thanks!

I believe the id and name are generated using

@Html.IdFor(m => m.Property)

and

@Html.NameFor(m => m.Property)

. The

3

comes from the value of

i

when you pass it into the

EditorFor

method, and these two methods pick that up and give you the appropriate value.

Thanks Rachel – it sounds right, but I'm only passing a

string

into the method (AFAIK). How does it get all that info from that?

If you're using a lambda expression (the arrow syntax, e.g.

m => registerModel.MemberProperties[i].Value

), it can use reflection to get the metadata rather than the value of that expression (if I'm remembering right)

If you use the tag helper

asp-for

it should accept the expression as a string, not sure if it works with

EditorFor

though as it's meant to be an alternative https://learn.microsoft.com/en-us/aspnet/core/mvc/views/working-with-forms?view=aspnetcore-8.0#expression-names

Thanks - that does actually help demystify some of the seemingly "magic" stuff going on... let's see if that helps me create a custom view for the checkbox then...