Regex class for validate any input string for any specific format.The following example will allow you to Input Phone Number only.Received Authentication Level property of all the messages in a known queue, displaying the type of signature that was used to sign any messages that requested authentication.For information on how authenticates messages, see Message Authentication. Received Authentication Level property (introduced in MSMQ 2.0) to validate authentication and to determine what type of signature was used to sign the message.Public Function is Valid Phone Number(By Val phone Number As String) As Boolean Dim pattern As String = "^(? Regex(pattern) Dim valid As Boolean = False valid = test. Sometimes people are just trying to be funny, or they are literally trying to break your program. If the data is indeed only alphabetic letters (no symbols, no numbers or any other punctuation characters) the test succeeds and stores True inside the Name Valid variable. This is because it becomes more legible than just a normal set of numbers. You could say that a program's testers are supposed to do this; yes, they should - nobody else should. If not, if there is even just one unallowed character that is not supposed to be there, the Match method will return False. Instead of you having to loop through each character to determine what that character is, you simply need the correct Regular Expression pattern. Clear() Surname Valid = False Else Surname Valid = True End If End Sub It is basically the exact same code for the Name box, but I just included the capability to comprehend a space character as well. People expect to enter a phone number in a format similar to this: ###-###-####.
Is Authenticated property, which can only validate that authentication was requested. Open(Access:=MQ_RECEIVE_ACCESS, _ Share Mode:=MQ_DENY_NONE) 'Peek at all the messages in the queue using a cursor. Peek Current(Receive Timeout:=1000) Do While Not msg Is Nothing 'Display the labels and signature types of messages that requested acknowledgment. Received Authentication Level Case MQMSG_AUTHENTICATED_SIG10 Msg Box "Message: " & msg.These tests include: Well, sometimes a good structured and thought out If statement can suffice, but it can become quite long and cumbersome in the future. By using Regular Expressions this way, you can reduce the chances of getting errors at erratic times. This sub checks the email's format and if it thinks that it matches, it returns True and vice versa.Also, the more tests you are performing, the slower your app might become. For more information regarding Regular Expressions, you are welcome to look at these two MSDN articles: Because it is always easy to learn by doing things practically, you will be creating an app that makes use of Regular Expressions to determine valid input. NET application and design the form to resemble Figure 1. Obviously this only works for the formatting of the email.Is Null Or Empty(str Phone Num) Then Phone Valid = re Phone. Text) Then 'Call Phone Validation Function Message Box. I set up my Expression to allow only numbers, but in the format I explained earlier. Is Match(str Phone Num) 'Check Validity Else Phone Valid = False 'Not Valid / Empty End If Return Phone Valid 'Return True / False End Function Private Sub txt Tel_Lost Focus(sender As Object, e As System. If it isn't valid input, it will clear the textbox and give it the focus again; if it is valid, the Phone Valid variable gets updated to true. Add the following inside your name Textbox's Leave event: Private Sub txt Name_Leave(sender As Object, e As System. Leave 'If Not A Matching Format Entered If Not Regex. If you are uncertain about the pattern I supplied, have a look here. Just a note, some surnames contain spaces and even hyphens. Sometimes there are even brackets surrounding the code.