You can also make use of Filtered Text Box Extender. On key Press event, just call a function and pass event as parameter. Can you tell me how I can compare the value of 2 textboxes in c#? Textbox1 = 3, Textbox2 = 4 I want to throw an error message to say something to the effect that the value entered in Textbox2 has to be smaller than textbox1.
This code is used to set a restriction on a textbox and allow only number to be entered in Visual Basic .
NET The code will be added to the Text Box Key Press event.
I'm fairly new to (self taught) and was just wondering if someone out there could help me out with some code.
A name doesn't generally contain weird symbols, and definitely not numbers. This can be from the mouse clicking inside another field, or a Tab key being pressed to navigate to the next input control. ") Else Email Valid = True 'Email is Perfect End If Else 'Not A Match To Pattern Email Valid = False 'Set Boolean Variable To False Message Box. I hope you have learned from this article and that you have enjoyed it as much as I did.
That may seem like Captain Obvious speaking, but you'll be amazed at some of the data that gets entered into a name field. I then created an If statement to determine how the input data was formatted and whether or not the data is only alphabetic.
A Text Box control is used to display, or accept as input, a single line of text.
Focus() 'allow tab and focus on next field If cvalue. 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.