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If it is, then we change Is Valid to true, if it is not we change Is Valid to false.
To test this out, simply load up the web site and click the button when the checkbox is not checked.
It allows you to specify required characters, optional characters, literal characters, such as hyphens and parentheses, currency characters, and date separators.
The control also works well when bound to a data source.
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.
Allow me to preserve value after the form is submitted.
The Format event on a data binding can be used to reformat incoming data to comply with the mask, and the Parse event can be used to reformat outgoing data to comply with the specifications of the data field. If you want full programmatic control over validation, or need to perform complex validation checks, you should use the validation events built into most Windows Forms controls.
Each control that accepts free-form user input has a Validating event that will occur whenever the control requires data validation.
NET coach, which means there are still people who don’t know how to do this. NET framework that can not be wired to the standard validation controls. You can’t use the Required Field Validator because it has a value. And you can’t provide a Regular Expression Validator or one of the others because it is a boolean value.
But, this question comes up repeatedly in my work as a .