Vb net textbox event validating
The simplest approach would just be to create a method that returns a bool and tries to parse the text into a Date Time object. Parse(string) method should work just fine, and if the text is not in the correct format you will catch the exception thrown.
Once you have the exception, you can determine how to better direct the user, and help them correctly format the Date Time.
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Let’s assume when we click our save button that we wish to validate the controls and display an icon if there is a problem.
The validated event works the same, only pass it the name textbox instead.
Here is just the validating event handler’s code: The event driven validation model in Win Forms is powerful and flexible enough to allow you to create high quality apps that implement robust and maintainable validation code in your forms.