Solved

How do I validate that a correct format was entered?

Posted on 2008-06-20
3
260 Views
Last Modified: 2010-04-23
I have a windows form with a textbox tbLength that displays a length of time for a scheduling program.  The user can enter a start date/time from a time picker field, and can enter a length - the combo of these 2 calculates the end date/time.  I need Length to be in a proper timespan format 1.00:00:00, etc.  How can I validate the entered value is OK?  Can I force the entered format to be 99.99:99:99?
0
Comment
Question by:djoyceRRD
3 Comments
 
LVL 27

Expert Comment

by:planocz
ID: 21834835
Try something like this to check the format of the time...
Imports System.Text.RegularExpressions

  Function IsValidTime(ByVal strIn As String) As Boolean
        ' Return true if strIn is in valid SSN format.
        Return Regex.IsMatch(strIn, "^\d{2}:\d{2}:\d{2}$")
    End Function
0
 
LVL 55

Accepted Solution

by:
Jaime Olivares earned 125 total points
ID: 21834860
you can use the TimeSpan.Parse() and TimeSpan.TryParse() static functions
0
 

Author Closing Comment

by:djoyceRRD
ID: 31469316
Thanks!  TryParse was exactly what I was looking for.
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When designing a form there are several BorderStyles to choose from, all of which can be classified as either 'Fixed' or 'Sizable' and I'd guess that 'Fixed Single' or one of the other fixed types is the most popular choice. I assume it's the most p…
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question