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如何使用WCF RIA服务在WPF中进行客户端验证

[英]How do I do client-side validation in WPF using WCF RIA Services

原文 2010-05-09 18:18:49 4 1 wpf/ wcf-ria-services

I've created a WCF RIA Service that I'd like to use with a WPF application. 我创建了一个WCF RIA服务，该服务想与WPF应用程序一起使用。 I've added several System.ComponentModel.DataAnnotations validation rules on the entities meta-data, all which work great on the server when I call .SubmitChanges(changeSet) from the client. 我已经在实体元数据上添加了几个System.ComponentModel.DataAnnotations验证规则，当我从客户端调用.SubmitChanges（changeSet）时，所有验证规则都可以在服务器上很好地工作。 I'd also like to validate my entities on the client side before I sumbit my changes to the server but I have no idea how to do so. 我还想在对服务器进行更改汇总之前先在客户端上验证我的实体，但我不知道该怎么做。 Any help in this regard would be greatly appreciated! 在这方面的任何帮助将不胜感激！ Thanks.... 谢谢....

1 个解决方案

As far as I know, there is no WCF RIA Services for WPF (although I'd be glad to be proven wrong, as I am waiting for this...), so you have to do the client-side work yourself. 据我所知，没有用于WPF的WCF RIA服务（尽管我很高兴能被证明是错误的，因为我在等待这个……），所以您必须自己进行客户端工作。

Use the VisualTreeHelper to go over every control in your form, and recursively if the control is a panel. 使用VisualTreeHelper可以遍历表单中的每个控件，如果控件是面板，则可以递归地遍历。 For each control, have a list of potentially-bound properties (I guess there is only one in this case). 对于每个控件，都有一个潜在绑定属性的列表（我想在这种情况下只有一个）。 For example, a TextBox will potentially have its TextBoxProperty bound, a CheckBox will have its IsCheckedProperty bound. 例如，一个TextBox可能绑定了TextBoxProperty，而CheckBox则绑定了IsCheckedProperty。 Use BindingOperation.GetBinding to get a Binding instance, which gives you the Source and Path properties. 使用BindingOperation.GetBinding获得Binding实例，该实例为您提供Source和Path属性。 Now use reflection on the source to see if there is a data annotation associated with it. 现在，在源上使用反射来查看是否有与之关联的数据注释。 If there is, check it. 如果有，请检查。