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To display the dataset column error, invoke the Set Column Error method of the Error Provider.
In a Win Form I'm doing initial validation in the Form. To make the code short only three fields are shown in the code.
Super Validator support 3 validation types (actions that trigger validation): Dot Net Bar is winner of Visual Studio Magazine Readers’ Choice Award as the Best User Interface Component for Windows Forms among more than 30 UI components.
We will implement the business rule to allow test appointments to be setup on weekdays only using validation on the form.
When the user enters data in the controls which fails validation, a blinking error image is displayed on the form next to the control and the error message is displayed as a tooltip to the error image.
You can display multiple error indications on a form at the same time using the same Error Provider control.
An obsolete specification is one that the W3C community has decided should no longer be used.
For example, it may no longer represent best practices, or it may not have received wide adoption and is not apparently likely to be adopted in the future.
This event occurs when the control is finished validating.
So before saving data, I want to validate whether all the required fields are filled (Text Boxes) by the user. I would rather use a generic function that would be passed each control on the form and based on the type of the control, separate validation logic would be written.
in case extra validation like restricting validation to some of the controls only, that would be decided at the function calling level.
Thankfully Win Forms has built in mechanisms to help facilitate data validation.
Each control has the following events and properties that are used to validate a form. Validation on a control is triggered when the control loses focus. Cancel Event Args] object as a parameter to the event block, which you can access this by using the in the Validating event, all events that would usually occur after the Validating event are suppressed.