BaseValidator::IsValid Property
Gets or sets a value that indicates whether the associated input control passes validation.
Assembly: System.Web (in System.Web.dll)
[ThemeableAttribute(false)] [BrowsableAttribute(false)] public: virtual property bool IsValid { bool get () sealed; void set (bool value) sealed; }
<asp:BaseValidator IsValid="True|False" />
Property Value
Type: System::Booleantrue if the associated input control passes validation; otherwise, false. The default value is true.
Implements
IValidator::IsValidUse the IsValid property to determine whether the associated input control passes validation.
Caution: |
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Because the default value of this property is true, it will return true if you query this property before validation is performed. For example, this might occur if you attempt to use this property in the Control::Load event of a page. |
The IsValid property is evaluated only when the Validate method is called. You can call the Validate method for each validation control on the page individually, or call all of them at once by using the Page::Validate method. Button controls with their CausesValidation property set to true will also call the Page::Validate method.
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It is possible to change the value of this property manually after validation has taken place. This allows you to override the validation result, if necessary. |
The Page::IsValid property for the page is set to true only if the IsValid property for each validation control on the page is also set to true.
This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins Overview.
The following code example demonstrates how to use the IsValid property to determine whether the associated input control passes validation.
Security Note: |
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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. |
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Caution: