MVC 3 Retrieve checkbox values from View, Model - entity-framework

Question

Maybe (actually I'm sure) it's me, but I cannot seem to figure out how to retrieve list items as part of a model object. The post here seems to satisfy everyone but neither answer is relatable in my limited understanding.
I need to get the items that are checked so I can update the Db. Sounds simple.
My Model:
public class UserAdminModel
{
public Guid UserId { get; set; }
public string UserName { get; set; }
public List<UserRole> UserRoles { get; set; }
public string csvAllRolls { get; set; }
}
public class UserRole
{
public Guid RoleId { get; set; }
public string UserRoleName { get; set; }
public bool UserisinRole { get; set; }
}
My View:
<% using (Html.BeginForm("UpdateRoles", "UserAdmin", FormMethod.Post))
{%>
<input type="hidden" id="UserId" name="UserId" value="<%: Model.UserId %>" />
...
<% foreach (var role in Model.UserRoles)
{ %>
<tr>
<td> </td>
<td colspan="2" nowrap="nowrap"><%: role.UserRoleName %></td>
<td> </td>
<td>
<input type="checkbox" id="UserRoles" name="UserRoles" value="<%: role.UserRoleName %>"
<% if (role.UserisinRole) { %>
checked="checked"
<% } %>
/></td>
</tr>
<% } %>
...
<input type="submit" name="Submit" value="Update Roles" /></td>
<% } %>
My Controller:
[HttpPost]
public ActionResult UpdateAllRoles(UserAdminModel model)
{
Guid uid = new Guid( Request["UserId"]);
return RedirectToAction("Index", "MyController");
}
The UserId comes through fine but the rest of the model is null. Any help would be appreciated.

Answer 1

You need to use a for loop so that your form controls have the correct name attributes to bind to your model (I'll leave it to you to convert from razor to aspx)
#using (Html.BeginForm("UpdateRoles", "UserAdmin", FormMethod.Post))
{
#Html.HiddenFor(m => m.UserId) // or add this as a route parameter in BeginForm()
...
for(int i = 0; i < Model.UserRoles.Count; i++)
{
#Html.HiddenFor(m => m.UserRoles[i].RoleId)
#Html.CheckBoxFor(m => m.UserRoles[i].UserisinRole)
#Html.LabelFor(m => m.UserRoles[i].UserisinRole, Model.UserRoles[i].UserRoleName)
}
<input type="submit" name="Submit" value="Update Roles" />
}
When you submit the form, model.UserRoles will contain all roles and you can get the selected roles using
var selectedRoles = model.UserRoles.Where(r => r.UserisinRole);
Side note: Using a <table> does not seem appropriate here.