如何通过反射检查属性是否是虚拟的? [英] How to check if a property is virtual with reflection?

问题描述

给定一个对象，我如何判断该对象是否具有虚拟属性?

Given an object, how can I tell if that object has virtual properties?

var entity = repository.GetByID(entityId);

我试着往里看:

PropertyInfo[] properties = entity.GetType().GetProperties();

但无法辨别是否有任何属性表示虚拟.

But couldn't discern if any of the properties would indicate virtual.

推荐答案

PropertyInfo[] properties = entity.GetType().GetProperties()
    .Where(p => p.GetMethod.IsVirtual).ToArray();

或者，对于 .NET 4 及以下版本:

Or, for .NET 4 and below:

PropertyInfo[] properties = entity.GetType().GetProperties()
    .Where(p => p.GetGetMethod().IsVirtual).ToArray();

这将得到一个公共虚拟财产的列表.

That will get a list of public virtual properties.

它不适用于只写属性.如果需要，您可以手动检查CanRead和CanWrite，并读取相应的方法.

It won't work for write-only properties. If it needs to, you can check CanRead and CanWrite manually, and read the appropriate method.

例如:

PropertyInfo[] properties = entity.GetType().GetProperties()
    .Where(p => (p.CanRead ? p.GetMethod : p.SetMethod).IsVirtual).ToArray();

您也可以只获取第一个访问器:

You could also just grab the first accessor:

PropertyInfo[] properties = entity.GetType().GetProperties()
    .Where(p => p.GetAccessors()[0].IsVirtual).ToArray();

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