10 Questions
To restrict a user's input at the level of the form, you can handle a control's ______ event.
Validating
Data validation is important because you should never ______ your users.
trust
The ______ event is triggered when moving focus from one control to another with the CausesValidation property set to true.
Validating
The ______ structure in C#.net is a predefined structure with its own methods.
char
By setting the CancelEventArgs.Cancel property to true in the Validating event handler, you can ______ the move of focus.
cancel
Which namespace is the Label class defined in?
System.Windows.Forms
Which class does the Button class inherit from?
ButtonBase
How can a Button be clicked?
All of the above
Which control is commonly used to display text in a set location on the page?
Label
Which controls are reusable components that encapsulate user interface functionality in client side Windows applications?
Buttons
Study Notes
Form Input Restriction
- To restrict user input, handle a control's Validating event.
Data Validation
- Data validation is crucial because you should never trust your users.
Control Events
- The Validating event is triggered when moving focus from one control to another with the CausesValidation property set to true.
- Setting the CancelEventArgs.Cancel property to true in the Validating event handler cancels the move of focus.
C# Structures
- The Bitmap structure in C#.net is a predefined structure with its own methods.
.NET Framework
- The Label class is defined in the System.Windows.Forms namespace.
- The Button class inherits from the ButtonBase class.
Button Control
- A Button can be clicked using the Click event.
Displaying Text
- The Label control is commonly used to display text in a set location on the page.
Reusable Components
- UserControls are reusable components that encapsulate user interface functionality in client-side Windows applications.
Test your knowledge on restricting user input in C#.net with this quiz. Learn about handling a control's Validating event, working with the char structure and its methods, and different ways to restrict user input at the form level. Understand the importance of data validation in WinForms.
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