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If you attempt to submit the form in Listing 3.1 without entering a value for a field, then a validation error message is displayed (see Figure 3.1). Notice that there is nothing wrong with associating more than one validation control with a form field.If you need to make a form field required and check the data type entered into the form field, then you need to associate both a when, and only when, there are no validation errors on the page.You'll be able to ask questions about coding or chat with the community and help others.So, simply put I made a quick method that returns true if a format provided is a valid for a date time to string representation.. Thanks in advance David Carrigan Why is my data not saved to my database? " Videos: VB | C# VBForums Database Development FAQ My Code Bank Submissions: VB | C# My Blog: Data Among Multiple Forms (3 parts) Beginner Tutorials: VB | C# | SQL Right.... Based on the name of the function and what you're passing in, it sounds like your're trying to validate the format of a date... Private Function Validate Date Time Format(By Val format As String) As Boolean Dim s As String= Date Time. To String(format) 'Create a Date String using the format passed into the function Dim dt As Date Time Dim result As Boolean = False If Date Time.In this chapter, you learn how to validate form fields when a form is submitted to the web server.You can use the validation controls to prevent users from submitting the wrong type of data into a database table.
If both forms included validation controls, then submitting the login form caused any validation controls contained in the registration form to be evaluated. For example, the page in Listing 3.5 contains both a login and registration form and both forms contain independent sets of validation controls. Because the form fields are grouped into different validation groups, you can submit the two forms independently.This is great from a user experience perspective because you get immediate feedback whenever you enter an invalid value into a form field.Client-side Java Script is supported on any uplevel browser.Supported browsers include Internet Explorer, Firefox, and Opera. NET, which supported only Internet Explorer as an uplevel browser.You can use the validation controls with browsers that do not support Java Script (or do not have Java Script enabled).