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

问题描述

我创建了一个 WCF RIA 服务，我想将它与 WPF 应用程序一起使用.我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，所有这些规则都在服务器上运行良好.我还想在将更改提交到服务器之前在客户端验证我的实体，但我不知道该怎么做.在这方面的任何帮助将不胜感激！谢谢....

I've created a WCF RIA Service that I'd like to use with a WPF application. 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. 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. Any help in this regard would be greatly appreciated! Thanks....

推荐答案

据我所知，WPF 没有 WCF RIA 服务(虽然我很高兴被证明是错误的，因为我正在等待这个...)，所以你必须自己做客户端工作.

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.

使用 VisualTreeHelper 遍历表单中的每个控件，如果控件是面板，则递归遍历.对于每个控件，都有一个潜在绑定属性的列表(我猜在这种情况下只有一个).例如，一个 TextBox 可能有它的 TextBoxProperty 绑定，一个 CheckBox 可能有它的 IsCheckedProperty 绑定.使用 BindingOperation.GetBinding 获取 Binding 实例，它为您提供 Source 和 Path 属性.现在使用对源的反射来查看是否有与之关联的数据注释.如果有，请检查它.

Use the VisualTreeHelper to go over every control in your form, and recursively if the control is a panel. For each control, have a list of potentially-bound properties (I guess there is only one in this case). For example, a TextBox will potentially have its TextBoxProperty bound, a CheckBox will have its IsCheckedProperty bound. Use BindingOperation.GetBinding to get a Binding instance, which gives you the Source and Path properties. Now use reflection on the source to see if there is a data annotation associated with it. If there is, check it.

是的，代码很多.

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