ValidationMessageObserver.OnValidationMessagesChanging Method

Indicates that a list of validation messages is changing.

Namespace:  Microsoft.VisualStudio.Modeling.Validation
Assembly:  Microsoft.VisualStudio.Modeling.Sdk.10.0 (in Microsoft.VisualStudio.Modeling.Sdk.10.0.dll)

Syntax

'Declaration
Protected Overridable Sub OnValidationMessagesChanging ( _
    messagesBeforeUpdate As ReadOnlyCollection(Of ValidationMessage), _
    messagesRemoved As ReadOnlyCollection(Of ValidationMessage), _
    messagesAdded As ReadOnlyCollection(Of ValidationMessage), _
    messagesAfterUpdate As ReadOnlyCollection(Of ValidationMessage) _
)

protected virtual void OnValidationMessagesChanging(
    ReadOnlyCollection<ValidationMessage> messagesBeforeUpdate,
    ReadOnlyCollection<ValidationMessage> messagesRemoved,
    ReadOnlyCollection<ValidationMessage> messagesAdded,
    ReadOnlyCollection<ValidationMessage> messagesAfterUpdate
)

protected:
virtual void OnValidationMessagesChanging(
    ReadOnlyCollection<ValidationMessage^>^ messagesBeforeUpdate, 
    ReadOnlyCollection<ValidationMessage^>^ messagesRemoved, 
    ReadOnlyCollection<ValidationMessage^>^ messagesAdded, 
    ReadOnlyCollection<ValidationMessage^>^ messagesAfterUpdate
)

abstract OnValidationMessagesChanging : 
        messagesBeforeUpdate:ReadOnlyCollection<ValidationMessage> * 
        messagesRemoved:ReadOnlyCollection<ValidationMessage> * 
        messagesAdded:ReadOnlyCollection<ValidationMessage> * 
        messagesAfterUpdate:ReadOnlyCollection<ValidationMessage> -> unit 
override OnValidationMessagesChanging : 
        messagesBeforeUpdate:ReadOnlyCollection<ValidationMessage> * 
        messagesRemoved:ReadOnlyCollection<ValidationMessage> * 
        messagesAdded:ReadOnlyCollection<ValidationMessage> * 
        messagesAfterUpdate:ReadOnlyCollection<ValidationMessage> -> unit 

protected function OnValidationMessagesChanging(
    messagesBeforeUpdate : ReadOnlyCollection<ValidationMessage>, 
    messagesRemoved : ReadOnlyCollection<ValidationMessage>, 
    messagesAdded : ReadOnlyCollection<ValidationMessage>, 
    messagesAfterUpdate : ReadOnlyCollection<ValidationMessage>
)

Parameters

• messagesBeforeUpdate
  Type: System.Collections.ObjectModel.ReadOnlyCollection<ValidationMessage>
  The ValidationMessage objects before the update occurred.

• messagesRemoved
  Type: System.Collections.ObjectModel.ReadOnlyCollection<ValidationMessage>
  The ValidationMessage objects that were removed.

• messagesAdded
  Type: System.Collections.ObjectModel.ReadOnlyCollection<ValidationMessage>
  The ValidationMessage objects that were added.

• messagesAfterUpdate
  Type: System.Collections.ObjectModel.ReadOnlyCollection<ValidationMessage>
  The ValidationMessage objects after the update occurred.

Remarks

methods are called in this order: 1. OnValidationMessagesChanging 2. OnValidationMessageRemoved - called once for each message removed. 3. OnValidationMessageAdded - called once for each message added. 4. OnValidationMessagesChangedSummary

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

ValidationMessageObserver Class

Microsoft.VisualStudio.Modeling.Validation Namespace