Find the below sample screen shot for validating the fields before saving the data Img 3: Validation method Here I have validated the fields using the Boolean method, If all the field values are entered properly it will return true, other wise it will return false and will display an error message.
The control is added to the form and displayed in the control tray in the Windows form in Design view. Now create an event handler for the “Validating” event of the text Box1 control.
We will validate the Text Box to ensure that the user has entered a value.
For example you can require the input for text-box and enforce the format to be an email.
Super Validator support 3 validation types (actions that trigger validation): We used Dot Net Bar in one of the products that we were building for a client and immediately got hooked.
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.
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.
Use this event to provide custom validation for any input control, such as a Text Box. In other words, the validating control will retain the focus until the user provides the correct format, even if the user clicks another control such as a button or textbox.
I.e., the caret will remain in the textbox until the user enters the correct format.
For example, if you were describing the input, you might say, "It should be between five and eight characters; it should be numeric and non-negative; it should always end in the digit '5,' etc." The concept of considering the data qualities rather than the validation process leads to the validation engine discussed in this article.