I know maybe this question is not directly related to support for EO.Web Grid, but I will post this question just in case I will get some help.

I created a Web Project, and a complex Web User Control "UC1".

This "UC1" has a ASP.NET DetailsView and a Grid Control EO.Web Grid "EO_Grid". Everything works fine.

I want to build another UC2 which will inherit all the features of UC1, but, it will overried or replace "EO_Grid" with a standard GridView Control. This is becuase UC1 has a lot of functionality that I want to avoid using Copy/Past to replicate them in UC2.

In other words, I want UC2 to work as if "EO_Grid" does not exisit or "deleted", becuase it has some licensing reuqirements, and I want the end user to choose what option he wants:

1. Work with UC1 which required a license,

or

2. Work with UC2 which does not require a license.

I need to implement the above logic as a Temporary Solution until I get the approval to use EO.Web in our organization.

Now, the EO.Web DLL is displaying wraning message about license, and I think it will stop the page from working if the license is expired. I have already deployed the application LIVE, and I need to implement this "trick" so that the application work without interruption.

How I can implement this requirement ?

Tarek.

The part which makes this tricky, is that User Controls have 3 parts: Source (Markup), Designer Generated Code, and custom Code-Behind.

I can create a new UC2 which will inherit UC1. In UC2, I copy/past the markup from UC1 to UC2 and delete EO_Grid Markup, and replace it with ASP.NET GridView. In other words, UC2 is same as UC1 but the EO.Web Grid must be replaced with ASP.NET GridView, and the Control ID must be the same, becuase most properties/methods do exist in both controls, and most code can be reused.

Actually, it worked, but not directly. I had to do some small tricks to make it work, beucase EO.Web Grid cannot be converted to ASP.NET GridView, which was the main problem. In UC2 I must remove all reference to EO.Web Dll.

I think I am nearly 80% done.

So, what I did ? I defined the control as "Object" in code ! And, I use "if typeof ... is ... then" to check for special cases.

That is the whole purpose of OOD/OOP ... code reusability.

Tarek.