Validating event of textbox in c

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You do not have to disable the Form’s Auto Validate property.However, I prefer to call it explicitly and handle all validation at once since you most likely will take action only if the entire control’s children pass validation. The most important thing to recognize here is how precise you can be with the validation error message in the error provider.The string specified in the second argument in the function invocation is displayed as the tooltip when the mouse is moved over the Error indicator.

You can also display a custom error image instead of the default image. This article should not be construed as a best practices white paper.

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.

You need to set the Data Source, Data Member and Container Control properties of the Error Provider control to set the error for a databound control.

To display the dataset column error, invoke the Set Column Error method of the Error Provider.

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