displaying data related to a contact - vb.net

Question

I don't really know how to deal with the next issue :
So, I've a webbased application developped with ASP.NET MVC3, which is used to remember when an event is relayed to some people.
I've 3 tables
Contact
id_contact
name
firstname
...
event
id_event
...
transmission
FK_id_event
FK_id_firstname
mailed (boolean)
phoned (boolean)
For each event, I need to list all the contacts that are related to this event. And for each contact, I need to display 2 checkboxes that have to be checked if the contact has been called or mailed.
'
' GET: /Event/Details/5
Function Details(id As Integer) As ViewResult
Dim event As event = db.event.Single(Function(o) o.idOpportunite = id)
Dim contacts = (From a In db.contact, b In db.transmission
Where a.id_Contact = b.FK_id_contact And b.FK_id_event = id
Select a)
Dim transmission = (From a In contacts, b In db.transmission
Where a.id_Contact = b.FK_trans_cont
Select b)
Dim model = New EventDetails With {
.event= event,
.Contacts = contacts,
.TransOpp = transopp
}
Return View(model)
End Function
I don't know if the "transmission" part of the code is good or not.
Here in the view, this is were I display the contacts
#For Each contact In Model.contacts
#<tr>
<td>
#Html.ActionLink(contact.name + " " + contact.firstname , "Details", New With {.id = contact.idContact})
</td>
<td>
#Html.Raw(contact.phone)
</td>
<td>
#*Html.DisplayFor(Function(modelItem) currentItem.mail)*#
<a href=mailto:#contact.mail>#Html.Raw(contact.mail)</a>
</td>
<td>
***My checkboxes should be here***
</td>
</tr>
Next
So, my question is, what should I do to display those checkboxes?
(sorry if I'm not understandable, I'm not a native english speaker. Don't hesitate to edit my english mistakes (or the title which is not a great one)).
With the help of Yasser, I've done this :
#code
Dim mail As Boolean = (From a In Model.Event
Where a.FK_id_contact = contact.idContact And a.FK_id_event = Model.Opportunite.idOpportunite
Select a.mailed)
End Code
However, I get an error :
Value of type 'System.Collections.Generic.IEnumerable(Of Boolean)' cannot be converted to 'Boolean'.

Answer 1

Here is something that should help
#{
bool isMailed = // set values;
bool isPhoned = // set values
}
#Html.CheckBox("mailed ", isMailed );
#Html.CheckBox("phoned", isPhoned );

Answer 2

In your ContactViewModel you can have two properties
bool isMailed ;
bool isPhoned ;
Then you can query the database from your controller before you bind the viewmodel the view and set those parameters. For example if you are showing data for contact id = 1 and event id = 2, you can query the database table transmissions and find whether you have called or mailed before and update the variable in ContactViewModel.
then in your view you can bind the values to the checkbox as follows
#Html.CheckBox("mailed ", contact.isMailed );
#Html.CheckBox("phoned", contact.isPhoned );
if you want to update the mailed or phoned in the database you can do it using the above ViewModel by submitting data to the controller. from controller you can find what is the Event_Id, Contact_Id and mailed or phoned , then you can update the database accordingly