In this article, I will discuss how to create a Masked Text Box control in Windows Forms at design-time as well as run-time.After that, I will continue discussing various properties and methods available for the Masked Text Box control. And a right Regex expression does help to do this task.255 values, jumps boxes, etc, etc... You can use Key Press event to read user input and determine in it is valid.The following code snippet sets Location, Width, and Height properties of a Masked Text Box control.
Figure 1 - These objects will determine if all our data is valid or not. Clear() 'Clear Text Box Name Valid = False 'Boolean = False Else Name Valid = True 'Everything Fine End If End Sub Easy one to start with. Focus() 'Set Focus To Text Box End If End Sub Private Sub txt Email_Lost Focus(sender As Object, e As System. Lost Focus Validate Email() 'Check Email Validity End Sub The expression may look horrible to the layman's eye, but look closer. To check if the user has entered an email that actually exists, you will have to find a different way such as to send a of some sorts.
The masked text box control is an enhanced text box control that supports a declarative syntax for accepting or rejecting user input.
By setting the Mask property, you can specify the allowable user input without writing any custom validation logic in your application.
For a summary of the characters that the Mask property supports, see the Remarks section of the Mask property.
If you change a mask when Masked Text Box already contains user input filtered by a previous mask, Masked Text Box will attempt to migrate that input into the new mask definition. Assigning a zero-length string as the mask will preserve any existing data in the control.