Hello, when I press the X in the top right hand corner of the application, I get a messagebox. The messagebox ask me a Yes/No question. If I press YES, all is good and the application closes. When I press NO, I can continue to use the application. Now the problem. If I press NO, then I can never press the X in the top right hand corner. It's as if the NO answer disables the ability to ever close the application again. How can I say NO and be able to press the X again when I want to close the application later?
First, I think you should call the base OnClosing method, not the OnClosed as you do. Second, you should call this base handler in both cases, as it will take care with proper action, whether or not event has been cancelled:
I want to apologize for not catching this the first time. I reviewed the issue with DevExpress and they reported that the Closing Event is only being raised once and this defect will be fixed in the next release. Article. thanks for your help!
Moveable elements: index cards, scrabble tiles, etc.
move: 'grab' and drag with LMB to another part of the window
I'm new to C# and WFC, etc. but have years of experience in PHP, C and other languages.
What I'm looking to know is:
- which element(s) (if element is the right word; checkbox? text entry field? what-have-you?) to use to create a scrabble tile or index card (whatever; the moveable object/thing)
- how movement is handled
Either a general sort-of pseudo code explanation or actual code is fine.
I don't know the terminology used in WFC (if WFC is even the right acronym) so maybe this question doesn't even make sense.
For game "pieces" I'd use either a Panel for rectangular pieces, or a UserControl for custom shaped pieces.
Search CodeProject for articles on drag and drop, and/or creating custom shaped Controls.
«... thank the gods that they have made you superior to those events which they have not placed within your own control, rendered you accountable for that only which is within you own control For what, then, have they made you responsible? For that which is alone in your own power—a right use of things as they appear.» Discourses of Epictetus Book I:12
The elements you refer to are from WinForms, and that's not a great engine to build games with
Eddy: What do you use instead of WinForms? And which specific element (or whatever it's called) would you use for (for instance) an index card that can be dragged around and dropped somewhere else within a window?
And which specific element (or whatever it's called) would you use for (for instance) an index card that can be dragged around and dropped somewhere else within a window?
It's hard to say it, I hate to say it, but probably WinForms. It has got built-in support for drag and drop, and there's an article on CodeProject showing how to use any bitmap in that drag-and-drop operation.
If you are into creating games, I'd strongly suggest to look at Unity. If you're looking for beta-testers, I'm here
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Don't do it like that! Never concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead.
When you concatenate strings, you cause problems because SQL receives commands like:
SELECT * FROM MyTable WHERE StreetAddress = 'Baker's Wood'
The quote the user added terminates the string as far as SQL is concerned and you get problems. But it could be worse. If I come along and type this instead: "x';DROP TABLE MyTable;--" Then SQL receives a very different command:
SELECT * FROM MyTable WHERE StreetAddress = 'x';DROPTABLE MyTable;--'
Which SQL sees as three separate commands:
SELECT * FROM MyTable WHERE StreetAddress = 'x';
A perfectly valid SELECT
A perfectly valid "delete the table" command
And everything else is a comment.
So it does: selects any matching rows, deletes the table from the DB, and ignores anything else.
So ALWAYS use parameterized queries! Or be prepared to restore your DB from backup frequently. You do take backups regularly, don't you?
Chances are, when you fix that throughout your application, the problem you have noticed will vanish at the same time.
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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