ContainerControl.ValidateChildren Method (ValidationConstraints)

Note: This method is new in the .NET Framework version 2.0.

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 (
	ValidationConstraints validationConstraints
)
public boolean ValidateChildren (
	ValidationConstraints validationConstraints
)
public function ValidateChildren (
	validationConstraints : ValidationConstraints
) : boolean

Parameters

validationConstraints

Tells ValidateChildren how deeply to descend the control hierarchy when validating the control's children.

Return Value

true if all of the children validated successfully; otherwise, false.

ValidateChildren will examine all the children of the current control, causing the Validating event to occur on a control if it meets the criteria spelled out by ValidationConstraints.

You may use several ValidationConstraints parameters at once by combining them with a bitwise OR operator.

Regardless of which parameters you specify for this method, a control must have its CausesValidation property set to true in order for its Validating event to occur. You should also set the AutoValidate property of the control or of the control's container to false if you want validation to happen only when you call ValidateChildren, and not when the user shifts focus from the control.

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.

You cannot achieve the opposite effect of a ValidationConstraints parameter by applying a bitwise negation operator. For example, if you supply the negative value of the Visible field to ValidateChildren, it will not validate all children that are not visible on the container. Supplying any negative parameter to ValidateChildren will have no effect on the container or its children.

The following code example will only cause the Validating event to occur for immediate children of the form whose Enabled property is true.

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

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0
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