RegularExpressionValidator::EvaluateIsValid Method ()

 

Indicates whether the value in the input control is valid.

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

protected:
virtual bool EvaluateIsValid() override

Return Value

Type: System::Boolean

true if the value in the input control is valid; otherwise, false.

The following code example demonstrates how to override the EvaluateIsValid method in a custom server control so that it always checks the value against the expression for a match in a RegularExpressionValidator.

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.

No code example is currently available or this language may not be supported.

The following code example demonstrates how to use the CustomRegularExpressionValidatorEvaluateIsValid control, defined in the preceding example, on a Web Forms page.

No code example is currently available or this language may not be supported.

.NET Framework
Available since 1.1
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