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ContainerControl.ValidateChildren Method ()

Causes all of the child controls within a control that support validation to validate their data.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public virtual bool ValidateChildren ()
public boolean ValidateChildren ()
public function ValidateChildren () : boolean
Not applicable.

Return Value

true if all of the children validated successfully; otherwise, false. If called from the Validating or Validated event handlers, this method will always return false.

ValidateChildren will descend a control's hierarchy and examine each control to see if it supports validation. If the control can be selected by the user and its CausesValidation property is true, ValidateChildren will cause the Validating event to occur. If any of the controls cancel the Validating event, this method will return false; otherwise, it will return true.

If a control is bound to a data source, and the Validating event occurs, it will cause the control to push its current data back to the data source.

Calling ValidateChildren is equivalent to calling ValidateChildren with a ValidationConstraints of None.

The following code example turns off implicit validation for a form and all of its contained controls, and instead manually performs validation of all of the form's children when a mouse button is clicked.

ValidateChildren#1

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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