Artigo
11/18/2011

ValidationErrorEventArgs Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Provides data for the BindingValidationError event.

Inheritance Hierarchy

System.Object
  System.EventArgs
    System.Windows.RoutedEventArgs
      System.Windows.Controls.ValidationErrorEventArgs

Namespace: System.Windows.Controls
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public Class ValidationErrorEventArgs _
    Inherits RoutedEventArgs

public class ValidationErrorEventArgs : RoutedEventArgs

The ValidationErrorEventArgs type exposes the following members.

Properties

	Name	Description
	Action	Gets the state of the validation error.
	Error	Gets the validation error that caused the BindingValidationError event.
	Handled	Gets or sets the value that marks the routed event as handled.
	OriginalSource	Gets a reference to the object that raised the event. (Inherited from RoutedEventArgs.)

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Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

The BindingValidationError event is raised when the binding engine creates and removes a validation error.

Examples

The following example shows how to set a binding to catch validation errors. When a BindingValidationError event is reported, use the ValidationErrorEventArgs to present the error Action information graphically to the user.

Private Sub StackPanel_BindingValidationError(ByVal sender As Object, _
    ByVal e As ValidationErrorEventArgs)

    If e.Action = ValidationErrorEventAction.Added Then

        MyTextBox.Background = New SolidColorBrush(Colors.Red)
    ElseIf e.Action = ValidationErrorEventAction.Removed Then
        MyTextBox.Background = New SolidColorBrush(Colors.White)
    End If

End Sub

private void StackPanel_BindingValidationError(object sender, 
    ValidationErrorEventArgs e)
{
    if (e.Action == ValidationErrorEventAction.Added)
    {
        MyTextBox.Background = new SolidColorBrush(Colors.Red);

    }
    else if (e.Action == ValidationErrorEventAction.Removed)
    {
        MyTextBox.Background = new SolidColorBrush(Colors.White);
    }
}

<StackPanel BindingValidationError="StackPanel_BindingValidationError" >
    <StackPanel.Resources>
        <my:Bills x:Name="MyBills"/>
    </StackPanel.Resources>
    <TextBox x:Name="MyTextBox" Width="50" Margin="10">
        <TextBox.Text>
            <Binding Mode="TwoWay" Source="{StaticResource MyBills}" 
                     Path="Amount" NotifyOnValidationError="true" 
                     ValidatesOnExceptions="true"/>
        </TextBox.Text>
    </TextBox>
    <Button Height="50" Width="150" Content="Click To Update Source"/>
</StackPanel>

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

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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