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扩展实体,报告编写错误 改变
原标题:Extending an Entity, error on ReportPropertyChanged

我正试图找出如何扩大实体,根据计算增加财产。 在下面的事例中,我创造了我赋予我目前二者数目的不动产(例如)。 然而,当我试图启动“报告程序”来提出发明通知时,我会发现错误。

public partial class MyEntity
{
    public double MyCustomizedProperty { get; set; }

    public MyEntity()
    {
        this.PropertyChanged += Entity_PropertyChanged;
    }

    void Entity_PropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        switch (e.PropertyName )
        {
            case "Date":
                MyCustomizedProperty = DateTime.Now.Second;
                ReportPropertyChanged("MyCustomizedProperty");
                break;
        }
    }
}

这汇编了所有材料,但当我改变“日期”时,我有一段错误:

不动产“我的客户”在实体目标上没有有效的实体测绘。 详情见实体框架文件。

我之所以这样说,是因为财产不在OnStateManager。 请让我知道如何确定这一点?

增 编

问题回答

您可尝试实施<代码>。 INotificationpropertyChanged cross and use it s event to report the Property Change.

在您的部分职位上使用:

public event PropertyChangedEventHandler NewPropertyChanged;

private void NotifyPropertyChanged(String propertyName)
{
    PropertyChangedEventHandler handler = NewPropertyChanged;
    if (null != handler)
    {
        handler(this, new PropertyChangedEventArgs(propertyName));
    }
}

在你们的财产变更中,用财产名称指它。

NotifyPropertyChanged("YourPropertiesName");




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