从字符串值获取对象属性

Question

我有一个看起来像这样的方法：

public string Bid(AdapterRequest adapterRequest)
{
    string property = "adapterRequest.Lead.Contact.ZipCode";
    string zipCode = ???
}

如何从字符串值中获取adapterRequest.Lead.Contact.ZipCode的值？

Answer 1

您可以使用带递归的反射：

public string Bid(AdapterRequest adapterRequest)
{
    string propertyChain = "Lead.Contact.ZipCode";
    string zipCode = ResolvePropertyChain(propertyChain.Split('.').ToList(), adapterRequest) as string;
    // ... assuming other logic exists here ...
}

public object ResolvePropertyChain(List<string> propertyChain, object source)
{
    object propertyValue = null;

    if (source != null)
    {
        propertyValue = source.GetType().GetProperty(propertyChain[0]).GetValue(source, null);

        if (propertyValue != null && propertyChain.Count > 1)
        {
            List<string> childPropertyChain = new List<string>(propertyChain);
            childPropertyChain.RemoveAt(0);
            propertyValue = ResolvePropertyChain(childPropertyChain, propertyValue);
        }
    }

    return propertyValue;
}

Answer 2

string zipCode = (string)adapterRequest.GetType().GetProperty(property).GetValue(adapterRequest, null);

请注意，这不适用于您的情况，因为您有一个对象层次结构，但您可以将属性拆分为多个部分并逐个获取对象，并在最新检索到的对象上重复查询下一部分 - GetType将在非空值。