OperationBase.MarkErrorAsHandled 方法

项目
03/18/2011

指定在处理操作时遇到错误。

命名空间: System.ServiceModel.DomainServices.Client
程序集： System.ServiceModel.DomainServices.Client（在 system.servicemodel.domainservices.client.dll 中）

用法

用法
Dim instance As OperationBase

instance.MarkErrorAsHandled

语法

声明
Public Sub MarkErrorAsHandled

public void MarkErrorAsHandled ()

public:
void MarkErrorAsHandled ()

public void MarkErrorAsHandled ()

public function MarkErrorAsHandled ()

示例

下面的示例演示了一个针对提交操作的回调方法，用于检查错误并调用 MarkErrorAsHandled 方法。

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();
}

异常

异常类型	条件
InvalidOperationException	HasError 属性为 false。

备注

在采取了从域操作中的错误进行恢复所必需的步骤之后，调用此方法。通过调用此方法，指示此错误将不会作为异常引发。如果不针对失败操作调用此方法，则会引发 Complete 方法中指定的异常。

System#ComponentModel#INotifyPropertyChanged#PropertyChanged 事件将针对 IsErrorHandled 属性而引发。

线程安全

此类型的任何公共静态（在 Visual Basic 中为共享）成员都是线程安全的。不保证所有实例成员都是线程安全的。

平台

开发平台

Windows XP Home Edition, Windows XP Professional, Windows Server 2003 、Windows Server 2008 和 Windows 2000

目标平台

Change History

另请参见

参考

OperationBase 类
 OperationBase 成员
 System.ServiceModel.DomainServices.Client 命名空间

通过