Csharp control validating

Trying to match these restrictions is a complex task, often resulting in long regular expressions. NET Framework regular expression classes are part of the base class library and can be used with any language or tool that targets the common language runtime, including ASP. The following C# source code shows how to validate an email address with the help of regular expressions.

This example extends previous article how to show an Input Box in C# using simple static method. This code shows the Input Box class implementation.

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.

csharp control validating-83csharp control validating-82

If you are interested in a product whose link does not work, search for it on the Web, as product pages frequently change and products/companies are frequently sold.

Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S. This technique will allow you to validate not just this control, but any other controls that require validation Finally, if the user does close the form, you will not have the problem that the form does not close Dabas Dabas, Thank you for showing me how to correctly validate any control and still allow my form to close.

I can validate and still allow the user to close the form at the same time.

Invoking the Set Error method of the Error Provider control displays an error indicator image next to the control specified as the first argument to the the Set Error method.

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.

Leave a Reply

Your email address will not be published. Required fields are marked *

One thought on “csharp control validating”