基于 lambda 表达式添加属性
我正在使用 C# 创建一个视图模型，稍后将其序列化为 Json 以与 KnockoutJs 一起使用。
现在，如果某个用户有权查看和/或编辑属性，我需要添加属性级别的信息。
由于 Javascript 几乎没有反射可能性，因此我想在序列化为 Json 之前使用 C# 执行此操作。
我的视图模型可能如下所示：
class ViewModel {
public string Name { get; set; }
}
我想使用用户访问服务，该服务将接受具有一些角色的用户和视图模型，并遍历角色并应用访问权限。像这样的东西：
class AccessService {
public void Apply(IUser user, ViewModel viewModel) {
if(user.Roles.Contains(Roles.Admin)) {
viewModel.AllowRead(vm => vm.Name);
}
}
}
viewModel.AllowRead(..)方法将是一个扩展方法，它将采用一个对象（或者如果需要的话可能是一个接口或类型），这是魔法发生的地方。
我希望此操作的结果是 viewModel 将获得一个名为 CanRead 的新属性，而该属性又将有一个名为 Name 的布尔属性。
生成的 viewModel 看起来像这样：
class ViewModel {
public string Name { get; set; }
public object CanRead { // Could non anonymous as well.
return new {
Name = true;
};
}
}
Can this be did withdynamics or do I have to use Reflection.Emit?我不是要求“显示代码”。我只是想知道我的想法是否是精神上的或者是否可能。
有什么想法吗？
I am using C# to create a view model that I later serialize into Json for use with KnockoutJs.
Now I need to add information on a property level if a certain user has access to view and/or edit the property.
Since Javascript has little to no reflection possibilities I want to do this with C# before serializing to Json.
My view model could look like this:
class ViewModel {
public string Name { get; set; }
}
I want to use a User Access Service that would take the user, which has some Roles, and the view model and go through the Roles and apply the access rights. Something like this:
class AccessService {
public void Apply(IUser user, ViewModel viewModel) {
if(user.Roles.Contains(Roles.Admin)) {
viewModel.AllowRead(vm => vm.Name);
}
}
}
The viewModel.AllowRead(..) method would be an extension method that would take an object (or maybe an interface or type if necessary) and this is where the magic would happen.
I would like the result of this operation to be that the viewModel would get a new property with the name CanRead which in turn would have a boolean property with the name Name.
The resulting viewModel would look like this:
class ViewModel {
public string Name { get; set; }
public object CanRead { // Could non anonymous as well.
return new {
Name = true;
};
}
}
Can this be done with dynamics or do I have to use Reflection.Emit? I'm not asking for "show me the codez". I just want to know if my idea is mental or if it's possible.
Any ideas?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
我认为这是可能的，您可以使用 Lambdanator 来帮助实现这一目标。
用法示例：
I think it would be possible and you could use the Lambdanator to help achieve this.
Example usage: