Vb validating textbox
Therefore, this is the first place where the validation should be done.This eliminates the possibility the end-users will incorrectly enter the values.
He has also explain how we can attach event handler to various dynamically added controls like Text Box, Button, etc.
Here Mudassar Ahmed Khan has explained how to register ASP.
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Some checks are business rules and thus conceptually they must be done in the business layer of the multi-layer application or in the server-side of a client/server application.
But the key components, which the end-users interact with, are those which reside in the presentation layer.
The best place to add validation to your application is in the dataset's partial class file.
In Visual Basic or Visual C#, open the Dataset Designer and double-click the column or table for which you want to create validation.