BindingGroup::ValidationRules Property

 
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Gets a collection of ValidationRule objects that validate the source objects in the BindingGroup.

Namespace:   System.Windows.Data
Assembly:  PresentationFramework (in PresentationFramework.dll)

public:
property Collection<ValidationRule^>^ ValidationRules {
	Collection<ValidationRule^>^ get();
}

Property Value

Type: System.Collections.ObjectModel::Collection<ValidationRule^>^

A collection of ValidationRule objects that validate the source objects in the BindingGroup.

When a ValidationRule is added to a BindingGroup, the BindingGroup is passed in as the first parameter of the Validate method. You can get the proposed values of the object by using the TryGetValue or GetValue(Object^, String^) method. You can get the objects that are the sources of the bindings from the Items property.

The following example adds the custom ValidationRule, ValidateDateAndPrice, to the BindingGroup.

<StackPanel.BindingGroup>
  <BindingGroup NotifyOnValidationError="True">
    <BindingGroup.ValidationRules>
      <src:ValidateDateAndPrice ValidationStep="ConvertedProposedValue" />
    </BindingGroup.ValidationRules>
  </BindingGroup>
</StackPanel.BindingGroup>

The following example shows the ValidateDateAndPrice class. The Validate method uses the BindingGroup to get the values the user entered into the form, and checks that if an item is over 100 dollars, it will be available for at least seven days.

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

.NET Framework
Available since 3.0
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