asp.net mvc c# - how to use check box in view and get it's value in model?

Question

Hello everybody,

can I use it like this in View?

<%= Html.CheckBoxFor(user => user.Role, "Administrator")%>

and then just read a value of property in model if checkbox is checked:

string role = user.Role;
(role = "Administrator")

Help me please!

Take care, Ragims

Answer 1

Checkboxes are read as "true" or "false", that is they are a boolean type. What you can do is have a viewmodel with a IsAdmin property and then check in your controller if the property is true.

// View
<%: Html.CheckBoxFor(model => model.IsAdmin)

// Controller
If(viewModel.IsAdmin)
{
    doYourStuff();
}

Answer 2

In your model...

public class UserEditModel { 
  public string UserName { get; set; }
  public string[] Role { get; set; }
}

In your view...

<%: Html.TextBoxFor(x = x.UserName)<br />
<input type="checkbox" name="role" id="role_Administrator" value="Administrator" />
<input type="checkbox" name="role" id="role_Create_Project" value="Create Project" />
<!-- etc -->

Yes, you need to write raw HTML for this scenario. This will bind correctly with the MVC defaults. The default CheckBoxFox really only works well with True/False bindings. Something like

<%: Html.CheckBoxFor(x => x.AcceptLicenseTerms) %>

or

<%: Html.CheckBoxFor(x => x.RememberMe) %>