Validate Method (String)
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Page.Validate Method (String)


Instructs the validation controls in the specified validation group to validate their assigned information.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

public virtual void Validate(
	string validationGroup


Type: System.String

The validation group name of the controls to validate.

This method is invoked when a user clicks any ASP.NET server control that has the CausesValidation property set to true, which is the default. These include the Button, ImageButton, and LinkButton Web server controls, the HtmlInputButton, HtmlInputImage, and HtmlButton HTML server controls, and controls that can automatically post back to the server such as the TextBox, CheckBox, ListControl, and BulletedList controls.

To disable validation for any button control on the page, set the button control's CausesValidation property to false.

The Validate method validates the specified validation group. After calling the Validate method on a validation group, the IsValid method will return true only if both the specified validation group and the validation group of the control that caused the page to be posted to the server are valid.

The following code example calls the Validate method on a page in a scenario with several different validation groups defined.

System_CAPS_security Security Note

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

.NET Framework
Available since 2.0
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