Using Enum values in html attributes

Question

can some one please tell me why this does not work, because im lost, kind of new to c# and coming from php environment

<asp:ListItem Value="<%:(int)Student.Classes.Enum.Enum.gender.male%>">Male</asp:ListItem>

but if i use this exact code outside it works perfect e.g

I am <%:(int)Student.Classes.Enum.Enum.gender.male%>

i expect to see 1, when i use it alone like the second line of code, i get I am 1, which is right, but in the first, that whole line is printed as is, like its text — Lappies
– Lappies, Commented Apr 2, 2013 at 16:12
That's what you did. You are giving the list item value a 1, but the text is Male. Did you look at the HTML source to see what it looks like? — Oded
– Oded, Commented Apr 2, 2013 at 16:14
I see you are using classic ASP.NET Web Forms -- I wouldn't recommend this for new development. Use Razor engine "Web Pages" instead. It's a much simpler and more modern approach that works with HTML instead of against it. See asp.net/web-pages — chris
– chris, Commented Apr 2, 2013 at 16:16
this is whats in the html **<option value="<%:(int)Student.Classes.Enum.Enum.gender.male%>">Male</option> ** — Lappies
– Lappies, Commented Apr 2, 2013 at 16:17

truemedia · Accepted Answer · 2013-04-02 17:21:12Z

1

As was recommended, you should use .NET MVC instead of webforms, so instead of using <asp:ListBox>, you should use @Html.DropDownList Learn more about it here: http://agilewarrior.wordpress.com/2012/12/13/how-to-simple-html-dropdownlistfor-mvc-net/

Your code for the dropdown/listbox would be:

@Html.DropDownList("StudentGender",
    new List<SelectListItem>() {  
        new SelectListItem(){ Text="Male",Value=Student.Classes.Enum.Enum.gender.male.ToString() },
        new SelectListItem(){ Text="Female",Value=Student.Classes.Enum.Enum.gender.female.ToString() }
    }, new { @class = "input-medium", size="6", multiple="multiple" } )

You can still use ASPX for the render engine in .NET MVC, which in that case you would use:

<%: Html.DropDownList(...) %>

answered Apr 2, 2013 at 17:21

truemedia

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Comments

Liam · Accepted Answer · 2013-04-02 16:30:52Z

0

I'm a little rusty with this kind of thing, @chris is right, get into MVC if your starting on C#, etc. ASP.Net will be dead in 5-10 years.

anyway, I'm presuming you've got something like this:

<asp:ListBox runat="server" Id="listBox">
</asp:ListBox>

you prob want to set this in code:

public Page_Load()
{
    listBox.DataSource = Enum.GetValues(typeof(Student.Classes.Enum.Enum.gender));
    listBox.DataBind();
}

answered Apr 2, 2013 at 16:30

Liam

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