Combobox validating cancel

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NET validation controls provide an easy-to-use but powerful mechanism of ensuring that data is entered correctly on the forms. In this article, let us see some tips and tricks that can be applied to the validation controls. NET validation controls provide an easy-to-use but powerful mechanism of ensuring that data is entered correctly on the forms. If you are not familiar with Validation Controls in ASP.There are 6 validation controls included in the ASP. There are 6 validation controls included in the ASP. NET, In this article, let us see some tips and tricks that can be applied to the validation controls.If the combo box is on a bound field, there may be an existing value which is not valid.With the combo box set to Limit To List, the field has a value, but you can't see it.

So when there is more than one validation control placed next to the field, the first validation control occupies screen space even when there is no error.

What you really want to know is if a valid value was selected.

A better check is with the List Index property: There is no need to check for Null.

Increase the List Rows property to display more choices and minimize the need to scroll.

The default is number of rows is 8 in Access 2003 or earlier.

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