Econtrol Form Designer Pro V2 10
Reece Pourier
For instance, I derive a class from RichTextBox or Panel, I rebuild my project to have the class added to the VS designer toolbox, and then I drag & drop the custom user control to a Form. Everything works fine, and I can run my project...
The problem comes when I edit properties of the Form or the custom user control through the designer. Sometimes, the designer removes the initialization line from its code-behind, causing an exception in the designer and the executable because the control remains uninitialized.
Step 6. Press F6 to rebuild, and at this point, the designer should crash with the following message: "The variable 'customRichTextBox1' is either undeclared or was never assigned." (In one case, the whole VS completely crashed, but the error is usually contained within the designer.)
The problem occurs when using an "internal" keyword with the control's constructor. Changing it to "public" fixes the problem. The reason for this behavior might be that the Designer's own classes cannot see the constructor because they are not within the namespace of my class unless it is marked public. This all makes sense, and I will use the public keyword from now on.
I had a similar problem that this posted helped me solve. I have a CustomControl that extends ComboBox, that class contained an internal private class YearItem. I've tried to highlight only the code needed to understand the problem and the solution.
I could drag/drop that control YearsCbo onto a form and it worked correctly, but after I returned and edited the form the VS designer generated code that would not compile. The offending code something like this:
I was wondering what is the best way to delete an unused control (more specifically, a timer) on Visual Studio 2010. I usually go to the control in the designer and delete it from there, but the code for the control still appears on the class form. Is it safe to delete the code associated with the control too?
As long as you don't need the logic, then yes. I assume you mean the handlers that are produced when you double click the control (such as button1_Click()). The link to the handler is removed when you delete the control, but visual studio leaves the functions in your form class in case you are using them for something else.
Delete a control through the visual editor, and the auto-generated code that creates the control and associates it with the form will be deleted as well. Code written by you, as well as event handling code generated through double clicking on the control or its events in the properties pane, will remain.
You should delete code that has to do with an non existent control. Any code that contains invalid references will keep you from building your application. Otherwise leftover code is just dead weight.
I've been working for a while on my Windows Forms project, and I decided to experiment with keyboard shortcuts. After a bit of reading, I figured I had to just write an event handler and bind it to the form's KeyDown event:
I did that the good ol' way of opening the Properties panel of the Visual Studio designer, then double-clicking on the KeyDown event of my form to generate the Form1_KeyDown event handler. But on testing my application, the form doesn't respond at all to the Ctrl+Alt+O keyboard shortcut. The Visual Studio designer did generate the code to bind the event handler to the form though:
Also, I tried to set a breakpoint on the event binding call (shown just above) and found that the program reaches that breakpoint just fine. But any breakpoints I set within the method definition itself are never reached.
A new form in the same solution.
Same issue: the form doesn't respond when I press my Ctrl+Alt+O keyboard shortcut and the debugger isn't even stepping into the event handler. Tried this again and it works.
There are a few different ways to intercept key events, and they all happen in sequence. KeyDown is handled last. Hence, KeyPreview isn't much of a preview, and the event could be silenced at a few stops on the way.
Note that you still have control over whether or not focused controls see the KeyDown event. Just return true to block the subsequent KeyDown event, rather than setting KeyPressEventArgs.Handled to true as you would in a KeyDown event handler. Here is an article with more details.
aforms server and aforms designer support the Austrian Portal Network Protocol (PVP) and the Enterprise Service Portal Protocol (USP). The portal attributes can be used to pre-fill form fields.