How do I go about providing localised text for items in a custom web control? I had thought that I just need to add meta.resourcekey tags to the control items and then define and fill some resource files called mycontrol.ascx.[lang].resx but that doesn't seem to work.
e.g.
MyControl.ascx
<asp:Label ID="Label1" meta:resourcekey="Label1" runat="server" Text="Oops!"></asp:Label>
MyControl.ascx.de.resx
Label1.Text Donner und Blitzen!
You dont need to add meta tags.
Have this in your resource file (MyControl.ascx.de.resx) which will be located in App_LocalResources:
Name Value
SomeName Oops!
Then in your User Control:
<asp:Label ID="Label1" meta:resourcekey="Label1" runat="server">
<%=GetLocalResourceObject("SomeName") %>
</asp:Label>
That helper method is part of the System.Web.UI.TemplateControl namespace.