Note: 2008 and older issues are only available as files.
On most versions of windows you must first save these files to your local machine, and then unblock the file in order to read it.
The Auto Validate property may have four values: Disable, Enable Prevent Focus Change, Enable Allow Focus Change, Inherit. If you set Enable Prevent Focus Change value and Cancel is set to true, focus will remain on the control that failed the validation.
If you set the Enable Allow Focus Change value and Cancel is set to true, focus is allowed to change to other control.
This event defines an event argument (Cancel Event Args) which contains the Boolean property named Cancel to set a signal that the event being fired should not be completed.
You need to display information related to error discovered in the Validating event, then we need to use the Error Provider control that provides a standard way to notify the user of an error.
The refining of the data is done later, when the data is passed to another layer for processing.
In this article, I will cover the principles and techniques built into Microsoft.
Validation in Windows Forms Validations concerns about checking data entry and making sure it is valid based on the criteria of the application requirements.
In Windows Forms programming, validation is based around controls and events.Therefore, this is the first place where the validation should be done.