ErrorListObserver.OnValidationMessagesChanging Method

Override to process a change to the message collection.

Namespace:  Microsoft.VisualStudio.Modeling.Shell
Assembly:  Microsoft.VisualStudio.Modeling.Sdk.Shell.12.0 (in Microsoft.VisualStudio.Modeling.Sdk.Shell.12.0.dll)

Syntax

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

protected override 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
) override

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

Parameters

• messagesBeforeUpdate
  Type: System.Collections.ObjectModel.ReadOnlyCollection<ValidationMessage>

• messagesRemoved
  Type: System.Collections.ObjectModel.ReadOnlyCollection<ValidationMessage>

• messagesAdded
  Type: System.Collections.ObjectModel.ReadOnlyCollection<ValidationMessage>

• messagesAfterUpdate
  Type: System.Collections.ObjectModel.ReadOnlyCollection<ValidationMessage>

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

ErrorListObserver Class

Microsoft.VisualStudio.Modeling.Shell Namespace