How can I use the <label>
tag within an ASP.NET application? I want it to be valid, accessible, and usable.
I understand the optimal HTML way is this:
<label for="Username">Username:</label>
<input type="text" id="Username" runat="server" />
But if the above code is in an ASP.NET user control, the input ID will change, meaning the label's "for" attribute is useless. I could make the label tag a server control and set its "for" attribute in the code (Username.ClientID
), but it seems like a lot of work for such a simple thing.
I've also seen this HTML used in the past:
<label>
<span>Username</span>
<input type="text" id="Username" runat="server" />
</label>
What is the proper approach?
I use <asp:Label ... AssociatedControlID="Username" ...>
controls for this. They get rendered as <label>
tags and set the for
attribute appropriately.
Note that you can also nest other tags within the Label control if you wish:
<asp:Label ID="UsernameLabel"
Text="Username:"
AssociatedControlID="UsernameTextBox"
runat="server">
<asp:TextBox ID="UsernameTextBox" runat="server" />
</asp:Label>