ASP .Net MVC, problem with checkboxes!

Question

Basically I have a set of checkboxes that are dynamically created from view data like so:

<input type="checkbox" name="Calendars" value="<%= c.ID %>" /><%= c.Name %>

The value being the Calendar Id.

I can get what checkbox has been brought back using the FormsCollection its messy but it works!

(There also seems to be a bug with the checkbox helper that renders a hidden field next to the checkbox which means true is actually returned as "true,false"! I can work around this so its not an issue just thought Id mention it)

The problem comes when trying to hook the checkboxes up on an edit page!

I have a schedule class which can have multiple calendars and I want to show which calendars a schedule has by checking them on the edit!

My view is strongly typed but MVC magic can't map this!

Any ideas on whats the best way to do this??

I had tried passing the calendar ids in ViewData and do some inline code to check the appropriate checkbox but this is getting messy!

Thanks!!

UPDATE:

Done this

s.ID == c.ID).Select(s => s).Count() > 0) ? "checked=checked" : "" %>

User · Accepted Answer · 2009-07-25 11:31:50Z

3

You need to add "checked" tag manually to every check box:

<input type="checkbox" name="Calendars" value="<%= c.ID %>" checked="checked" /><%= c.Name %>

answered Jul 25, 2009 at 11:31

User

31.1k22 gold badges84 silver badges108 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Rigobert Song Over a year ago

Thanks! I was over complicating it!

eu-ge-ne · Accepted Answer · 2009-07-25 11:47:12Z

2

You dont need <input type="checkbox" - use Html.Checkbox(). It renders a hidden field next to the checkbox - but it is not a bug. From ASP.NET MVC source, InputExtensions.cs, line 201:

// Render an additional <input type="hidden".../> for checkboxes. This
// addresses scenarios where unchecked checkboxes are not sent in the request.
// Sending a hidden input makes it possible to know that the checkbox was present
// on the page when the request was submitted.

Use this:

<%= Html.CheckBox("Calendars", c.ID) %>

answered Jul 25, 2009 at 11:47

eu-ge-ne

28.2k6 gold badges73 silver badges62 bronze badges

Collectives™ on Stack Overflow

ASP .Net MVC, problem with checkboxes!

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related