Custom Control - strange Design Time behviour

[Adam Rzecki]

Hello,

I have a problem connected with a custom control I created.

I derived the custom control from System.Windows.Forms.TextBox.

The strange problem is that when I drag and drop my new control from the
toolbox onto a form, the control doesn't display its Text property
value. Instead of this, it just shows its class name
(MyProject.Controls.SmartTextBox)...

After this, I tried do the same with a new UserControl. I created a
UserControl derived class and put a button onto it. When I drag the User
Control and drop onto my form, only its class name, but no button (no
content) is displayed.

Finally, I created a new project, then derived Custom Control from
TextBox and... it worked - control was visible and its "Text" property
value was properly displayed inside. So I suppose something is wrong
with my project... :-(

Thank you in advance for any suggestions or informations,
Best regards,
Adam.

 

[Adam Rzecki]

Hello,

I have established that the problem occurs only in .NET CF application
(as mine is). The problem is connected with SQLite ADO.NET assembly I
use. Wherever I use any of types from that assembly (e.g. in a form,
simple class, in method or as static, non-static, public, private field,
etc.), even if it is something like that:
System.Data.SQLite.SQLiteConnection conn = null;

the strange behaviour of derived constrols occur. What is most important
it does not matter _where_. This can be reproduced doing things
mentioned above in _any_ of *.cs project files.

Thanks for any explanation,
BR,
A.


Adam Rzecki pisze: