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.NET Forum / Languages / C# / November 2007Embedded user controls
c#, .Net 2.0, VS2008 I have a user control, and wish to embed other custom/user controls within this control. I am getting problems in compilation though, that the type or namespace cannot be found. I have used the same namespace for both components. Everything compiles and works fine with each of the respective user controls used in the main project. The main control is derived from TabPage, and one of the embedded controls is derived from CheckBox. Any way of resolving this? > c#, .Net 2.0, VS2008 > [quoted text clipped - 6 lines] > [...] > Any way of resolving this? Undoubtedly. You haven't really offered much in the way of specifics, but generally speaking you'll get a compilation error like that if you've failed to be specific enough about the namespace for some type you're using, or you've failed to add a necessary reference to the project (under "References" in the Solution Explorer). If the former, you can solve that either by providing the fully qualified name for the namespace before the type, or you can provide an appropriate "using" statement at the beginning of the source file. Not knowing the exact error, it's impossible to know what namespace or reference hasn't been included. But it may be as simple as needing to add a reference to the assembly for your custom control. Pete > > c#, .Net 2.0, VS2008 > [quoted text clipped - 24 lines] > > Pete The situation is I have the source for both of the components in the same project. Simplifying it, I have a control derived from the TabPage, and another control derived from the CheckBox, which I wish to programmatically place on the TabPage. Both controls are in the same project, and using the same namespace. I can use either control in any part of the project (eg put the derived checkbox on the mainform), just not use it in the custom tabpage control. Note: I am not trying to solve the specifics of how to add the checkbox derived control, but generically, as there are a few other controls I wish to use on my derived TabPage. Even when I tried to use a DLL of the custom controls, and referenced the assembly in the project, I still got the same error. > [...] > Even when I tried to use a DLL of the custom controls, and referenced > the assembly in the project, I still got the same error. As I wrote, this is usually not a difficult thing to fix. The compilation error provides detailed information that should lead you to a solution. But you haven't provided enough information here for anyone else to answer the question. The exact wording of the compilation error and a concise-but-complete sample of code demonstrating the problem would be required. You claim that both controls are in the same project and in the same namespace. If so, then you've either got a typo or a conflicting name or you've failed to completely qualify a nested type or you're wrong about them being in the same project and namespace. As you can see, there are a variety of things that could cause the error you're describing and so there's no way for anyone else to know which of those problems is actually the issue as long as you continue to withhold the important details. Pete Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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