比较两个对象的属性以发现差异？ [英] Compare two objects' properties to find differences?

问题描述

我有两个相同类型的对象，我想遍历每个对象的公共属性，并提醒用户哪些属性不匹配。

I have two objects of the same type, and I want to loop through the public properties on each of them and alert the user about which properties don't match.

是否可以在不知道对象包含哪些属性的情况下执行此操作？

Is it possible to do this without knowing what properties the object contains?

推荐答案

是的，通过反射-假定每种属性类型适当地实现等于。另一种选择是对除某些已知类型以外的所有其他类型递归使用 ReflectiveEquals ，但这会很棘手。

Yes, with reflection - assuming each property type implements Equals appropriately. An alternative would be to use ReflectiveEquals recursively for all but some known types, but that gets tricky.

public bool ReflectiveEquals(object first, object second)
{
    if (first == null && second == null)
    {
        return true;
    }
    if (first == null || second == null)
    {
        return false;
    }
    Type firstType = first.GetType();
    if (second.GetType() != firstType)
    {
        return false; // Or throw an exception
    }
    // This will only use public properties. Is that enough?
    foreach (PropertyInfo propertyInfo in firstType.GetProperties())
    {
        if (propertyInfo.CanRead)
        {
            object firstValue = propertyInfo.GetValue(first, null);
            object secondValue = propertyInfo.GetValue(second, null);
            if (!object.Equals(firstValue, secondValue))
            {
                return false;
            }
        }
    }
    return true;
}

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