SubmitOperation Class

Artigo
01/27/2012

[WCF RIA Services Version 1 Service Pack 2 is compatible with either .NET framework 4 or .NET Framework 4.5, and with either Silverlight 4 or Silverlight 5.]

Represents an asynchronous submit operation.

Inheritance Hierarchy

System.Object
System.ServiceModel.DomainServices.Client.OperationBase
System.ServiceModel.DomainServices.Client.SubmitOperation

Namespace: System.ServiceModel.DomainServices.Client
Assembly: System.ServiceModel.DomainServices.Client (in System.ServiceModel.DomainServices.Client.dll)

Syntax

'Declaration
Public NotInheritable Class SubmitOperation _
    Inherits OperationBase

'Usage
Dim instance As SubmitOperation

public sealed class SubmitOperation : OperationBase

public ref class SubmitOperation sealed : public OperationBase

[<SealedAttribute>]
type SubmitOperation =  
    class
        inherit OperationBase
    end

public final class SubmitOperation extends OperationBase

The SubmitOperation type exposes the following members.

Properties

	Name	Description
	CanCancel	Gets a value that indicates whether this OperationBase is currently in a state that enables it to be canceled. (Inherited from OperationBase.)
	ChangeSet	Gets change set being submitted.
	EntitiesInError	Gets any entities that have errors after the submit operation completes.
	Error	Gets the operation error if the operation failed. (Inherited from OperationBase.)
	HasError	Gets a value that indicates whether the operation failed. (Inherited from OperationBase.)
	IsCanceled	Gets a value that indicates whether this operation has been canceled. (Inherited from OperationBase.)
	IsComplete	Gets a value that indicates whether this operation has completed. (Inherited from OperationBase.)
	IsErrorHandled	Gets or sets a value that indicates whether the operation error has been handled. (Inherited from OperationBase.)
	Result	Gets the result of the asynchronous operation. (Inherited from OperationBase.)
	SupportsCancellation	Gets a value that indicates whether this operation supports cancellation. (Inherited from OperationBase.)
	UserState	Gets the optional user state for this operation. (Inherited from OperationBase.)

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Methods

	Name	Description
	Cancel	Cancels the operation. (Inherited from OperationBase.)
	CancelCore	When overridden in a derived class, provides the logic to cancel the operation. (Inherited from OperationBase.)
	Complete(Exception)	Completes a failed operation with the specified error. (Inherited from OperationBase.)
	Complete(Object)	Completes a successful operation with the specified result. (Inherited from OperationBase.)
	Equals	(Inherited from Object.)
	Finalize	(Inherited from Object.)
	GetHashCode	(Inherited from Object.)
	GetType	(Inherited from Object.)
	InvokeCompleteAction	Invokes the completion callback. (Inherited from OperationBase.)
	MarkErrorAsHandled	Specifies that an error encountered in an operation is handled. (Inherited from OperationBase.)
	MemberwiseClone	(Inherited from Object.)
	OnPropertyChanged	Called when the value of a property changes. (Inherited from OperationBase.)
	RaisePropertyChanged	Raises the System#ComponentModel#INotifyPropertyChanged#PropertyChanged() event. (Inherited from OperationBase.)
	ToString	(Inherited from Object.)

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Events

	Name	Description
	Completed	Occurs when the operation completes. (Inherited from OperationBase.)

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Explicit Interface Implementations

	Name	Description
	INotifyPropertyChanged.PropertyChanged	Occurs when a property value changes. (Inherited from OperationBase.)

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Examples

The following example shows a callback method named OnSubmitCompleted that accepts a SubmitOperation object as a parameter. It uses this object to check for errors and mark the errors as handled.

Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
    _customerContext.SubmitChanges(AddressOf OnSubmitCompleted, Nothing)
End Sub

Private Sub RejectButton_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
    _customerContext.RejectChanges()
    CheckChanges()
End Sub

Private Sub CustomerGrid_RowEditEnded(ByVal sender As System.Object, ByVal e As System.Windows.Controls.DataGridRowEditEndedEventArgs)
    CheckChanges()
End Sub

Private Sub CheckChanges()
    Dim changeSet = _customerContext.EntityContainer.GetChanges()
    ChangeText.Text = changeSet.ToString()

    Dim hasChanges = _customerContext.HasChanges
    SaveButton.IsEnabled = hasChanges
    RejectButton.IsEnabled = hasChanges
End Sub

Private Sub OnSubmitCompleted(ByVal so As SubmitOperation)
    If (so.HasError) Then
        MessageBox.Show(String.Format("Submit Failed: {0}", so.Error.Message))
        so.MarkErrorAsHandled()
    End If
    CheckChanges()
End Sub

private void SaveButton_Click(object sender, RoutedEventArgs e)
{
    _customerContext.SubmitChanges(OnSubmitCompleted, null);
}

private void RejectButton_Click(object sender, RoutedEventArgs e)
{
    _customerContext.RejectChanges();
    CheckChanges();
}

private void CustomerGrid_RowEditEnded(object sender, DataGridRowEditEndedEventArgs e)
{
    CheckChanges();
}

private void CheckChanges()
{
    EntityChangeSet changeSet = _customerContext.EntityContainer.GetChanges();
    ChangeText.Text = changeSet.ToString();

    bool hasChanges = _customerContext.HasChanges;
    SaveButton.IsEnabled = hasChanges;
    RejectButton.IsEnabled = hasChanges;
}

private void OnSubmitCompleted(SubmitOperation so)
{
    if (so.HasError)
    {
        MessageBox.Show(string.Format("Submit Failed: {0}", so.Error.Message));
        so.MarkErrorAsHandled();
    }
    CheckChanges();
}

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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