C# : Validate a TextBox Using an Error Provider

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ErrorProviderValidateFig.2

 

Validating a textbox is very important and there are many ways on how to do it. But, in this tutorial, I’m going to teach you the simplest way on how to validate a textbox by using an error provider. Error provider displays a user-friendly message to notify the user whenever validation fails. Then, that’s the time for the user to correct the error and validate the message in the textbox.

 

Let’s begin:

 

Open Microsoft Visual Studio and create a new windows form application. Then, drag two textboxes, labels, button and an error provider.

ErrorProviderValidateFig.1

After setting up the form, double-click the “check” button and do the following codes for validating the textboxes.

Output:

ErrorProviderValidateFig.2

For all students who need a programmer for your thesis system or anyone who needs a source code in any programming languages. You can contact me @ :

 
Email – [email protected]
Mobile No. – 09305235027 – TNT

 

 

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