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DataErrorValidationRule Class

Represents a rule that checks for errors that are raised by the IDataErrorInfo implementation of the source object.

System::Object
  System.Windows.Controls::ValidationRule
    System.Windows.Controls::DataErrorValidationRule

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public ref class DataErrorValidationRule sealed : public ValidationRule
<DataErrorValidationRule .../>

The DataErrorValidationRule type exposes the following members.

  NameDescription
Public methodDataErrorValidationRuleInitializes a new instance of the DataErrorValidationRule class.
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  NameDescription
Public propertyValidatesOnTargetUpdatedGets or sets a value that indicates whether the validation rule runs when the target of the Binding is updated. (Inherited from ValidationRule.)
Public propertyValidationStepGets or sets when the validation rule runs. (Inherited from ValidationRule.)
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  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodValidate(Object, CultureInfo)Performs validation checks on a value. (Overrides ValidationRule::Validate(Object, CultureInfo).)
Public methodValidate(Object, CultureInfo, BindingExpressionBase)Performs validation checks on a value. (Inherited from ValidationRule.)
Public methodValidate(Object, CultureInfo, BindingGroup)Performs validation checks on a value. (Inherited from ValidationRule.)
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The WPF data binding model enables you to associate ValidationRules with a Binding object. If your source object implements the IDataErrorInfo interface, you can use the built-in rule DataErrorValidationRule to check for errors raised by the IDataErrorInfo implementation.

An alternative syntax to setting the DataErrorValidationRule explicitly is to set the ValidatesOnDataErrors property to true on your Binding or MultiBinding object.

You can create a custom rule by creating a class that derives from ValidationRule. For more information and a detailed discussion of data validation, see Data Binding Overview.

DataErrorValidationRule is introduced in the .NET Framework version 3.5. For more information, see .NET Framework Versions and Dependencies.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5 SP1, 3.0 SP1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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