如何将这个小代码段从aspx转换为MVC Razor

Question

Here's the source:

<% string[] roles = ViewData["Roles"] as string[]; 
                   if (roles != null && roles.Length > 0) {%>
            <p>
                <label for="roleName">
                    Role:</label>
                <% foreach (string role in roles) { %>
                <%: Html.RadioButtonFor(m => m.RoleName, role) %>&nbsp; <span>
                    <%: role%></span>
                <% } %>
            </p>
            <%} %>

Here's my attempt:

 @{
        string[] roles = ViewData["Roles"] as string[]; 
        if (roles != null && roles.Length > 0) {
            <p>
                <label for="roleName">Role:</label>
                foreach (string role in roles) {    
                    @Html.RadioButtonFor(m => m.RoleName, @role)&nbsp; <span>@role</span>
                    }
            </p>
        }
    }

The problem is that at run time I get the following error message:

Compiler Error Message: CS0103: The name 'role' does not exist in the current context

Source Error:

Line 41:                 <label for="roleName">Role:</label>
Line 42:                 foreach (string role in roles) {    
Line 43:                     @Html.RadioButtonFor(m => m.RoleName, @role)&nbsp; <span>@role</span>
Line 44:             </p>
Line 45:         }

Can someone see what's wrong. I tried but it seems there is something wrong with my attempt. So far I also tried change line 43 to:

@Html.RadioButtonFor(m => m.RoleName, role)&nbsp; <span>@(role)</span>

@Html.RadioButtonFor(m => m.RoleName, role)&nbsp; <span>@role</span>

Both still don't work :-(

Answer 1

@Html.RadioButtonFor(m => m.RoleName, @role)&nbsp; <span

should be

@Html.RadioButtonFor(m => m.RoleName, role)  

the @role is correct. but no @ sign is required in the RadioButtonFor(...) call

Answer 2

foreach (string role in roles) {    
    @Html.RadioButtonFor(m => m.RoleName, @role)&nbsp; <span>@role</span>
}

should be

@foreach (string role in roles) {    
    @Html.RadioButtonFor(m => m.RoleName, role) <span>@role</span>
}

Answer 3

try this:

@{
    string[] roles = ViewData["Roles"] as string[]; 
    if (roles != null && roles.Length > 0) {
    <p>
        <label for="roleName">Role:</label>
        @foreach (string role in roles) {    
            @Html.RadioButtonFor(m => m.RoleName, @role)@:&nbsp;<span>@role</span>
        }
    </p>
    }
}

or you can use:

@{
    string[] roles = ViewData["Roles"] as string[]; 
}
@if (roles != null && roles.Length > 0) {
<p>
    <label for="roleName">Role:</label>
    @foreach (string role in roles) {    
        @Html.RadioButtonFor(m => m.RoleName, @role)@:&nbsp;<span>@role</span>
    }
</p>
}