Register Custom Controls In Web.config
This one is probably old news to many of you, but I just recently ran across it. Every time I want to add a new control to a new page, I get annoyed because I have to remember that annoying syntax for registering a control.
Let’s see...how does it go again? Do I have to add a
attribute? No, that’s for user controls. Hmmm, forget it, I’ll just
dynamically add it! Well in the interest of reducing future angst, here
are two examples of the syntax, one for a custom control and one for a
<%@ Register TagPrefix="st" Namespace="Subtext.Web.Controls" Assembly="Subtext.Web.Controls" %> <%@ Register TagName="SomeControl" TagPrefix="st" Src="~/Controls/SomeControl.ascx" %>
The first one registers the tag prefix st with the
Subtext.Web.Controls namespace in the
The second one registers the tag name
SomeControl with the user
Add this to the top of your page or user control and you can reference a control from this assembly like so:
<st:HelpToolTip id="blah" runat="server" HelpText="Blah!" /> <st:SomeControl id="foo" runat="server" />
A most helpful tooltip!
Fortunately, starting with ASP.NET 2.0, we can register a tag prefix
Web.config file. This basically makes all the controls
within that namespace and assembly available to all pages without having
to add that ugly
<system.web> <pages> <controls> <add assembly="Subtext.Web.Controls" namespace="Subtext.Web.Controls" tagPrefix="st" /> <add src="~/Controls/SomeControl.ascx" tagName="SomeControl" tagPrefix="st" /> </controls> </pages> </system.web>
Thanks to the ASP.NET 2.0 MVP Hacks book for this one.