Asp net validating a checkboxlist control
We can do that via Custon Validator Control on ASP. But the solution I posted for Checkbox validation is much more simple I guess What do you think? You can simply download the dll, inlcude it in the Visual Studio (Web Developer) Toolbox and then you can drag and drop it anywhere you like, so it is a simple to use as any other validation control, including client and server side validation as you would expect from a validator control.Net 3.5 Toolbar on the first examples and on the second one we are able to that manually ! It also works with the Validation Summary control... It's really helpful for me and helped me lot to complete my task. I had found another nice post over the internet which was also explained very well about Validating File Upload control for specific file type and required field, for more details of this post check out this link... There are few links that also helpful for developers.However, thanks to the magic of inheritance in the Microsoft® .NET Framework, it is possible to provide a suite of controls that do specific validation with specific properties, because the overhead of deriving each new control is very small.In fact, even Base Validator is too lazy to implement its own Text property and inherits from Label.It is beneficial to understand the sequence of events when a page with validation Web controls is processed.
Validation of Web applications is particularly frustrating for other reasons as well.If any of the validation conditions are optional, you will want to know exactly when validation takes place on both the client and the server.If you are writing your own validation routines that are potentially time-consuming or that have side effects, it is also important to have an idea of when they will be called. It is important to understand the life cycle of a page.For those used to working with forms in Visual Basic or similar rich client tools, it takes a bit of getting used to.A page and all the objects on it do not actually live for as long as a user is interacting with them, although it can sometimes seem like they do.