Silverlight 转换器，用于将对象转换为字符串并返回
我的模型中有一个 Address 对象，它有 6 个地址行作为单独的属性。在我的 Silverlight 视图中，我希望将其显示在多行文本框中并使用数据绑定进行更新。
View 链接到 ViewModel，该 ViewModel 具有始终设置的 Address 属性。我的第一个想法是使用 ValueConverter，它最初很好，因为它可以接受一个 Address 对象并传回一个显示的字符串。
当我想转换回字符串时，我的问题出现了。我希望更新现有的 Address 对象，但找不到方法来执行此操作。我认为你可以传回一个新的 Address 对象，但这不是我想要发生的事情。
我在这里走在正确的轨道上，或者有没有比使用 ValueConverter 更好的方法。
I have an Address object in my model which has 6 address lines as separate properties. In my Silverlight view I want this to be displayed in a multiline text box and to be updated using databinding.
The View is linked to a ViewModel which has an Address property which is always set. My first thought was to use a ValueConverter which was initially fine as it could take an Address object and pass back a string which is displayed.
My problem arises when I want to ConvertBack the string. I wish to update the existing Address object but cannot find a way to do this. I think you can pass back a new Address object but this is not what I want to happen.
I am on the right track here or is there a better method than using a ValueConverter.
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您几乎已经走在正确的轨道上了！您的观察是正确的，
ConvertBack方法需要创建一个新的 Address 实例。您无法在转换器中获得对原始地址的引用，绑定框架不允许这种紧密耦合。使用 MVVM 怎么样？创建一个 ViewModel，将您的地址公开/调整为字符串，基本上执行您的值转换器的角色。当
TwoWay绑定更新此字符串属性时，您的 ViewModel 可以更新它所适应的地址。You are almost on the right track here! You are right in your observation that the
ConvertBackmethod would need to create a new Address instance. You cannot obtain a reference back to the original address in your converter, the binding framework does not permit this kind of tight coupling.How about using MVVM? create a ViewModel that exposes / adapts your Address as a string, basically performing the role of your value converter. When the
TwoWaybinding updates this string property, your ViewModel can then update the Address that it adapts.