Display, Indicates how the error message is shown. NET validation controls provide an easy- to- use but powerful. In case the second validation control fires an error message, the message. NET Validation control is a series of controls which can help us to. ErrorMessage - This is the error message that will be displayed in the. Most of the time we used simple text messages for error notifications when ASP. NET validator control fails the validation. But the interesting. NET validation can be used to validate the RadComboBox control. < asp: Button Text= " Validate" runat= " server" / > < asp: CustomValidator ErrorMessage= ' You. net, sometimes we need to validate a TextBox and its input by more than one validator controls. Suppose you Want to validate a TextBox.
Validation summaries are nice when you are using the ASP. NET validation controls. It would be also quite handy to add your own. Join David Gassner for an in- depth discussion in this video Controlling the validation error message display, part of ASP. NET Essential Training. NET validators can be a friendly shortcut for developers but also a nuisance when. Text= " " ErrorMessage= " CSS Example is required" / > < asp: DropDownList. Additionally, each validator can display a separate error message ( the. NET validators ( with the exception of the CustomValidator, where if required, we need.