C＃的回归反射&安培;泛型列表设置默认属性 [英] c# Recursive Reflection & Generic Lists setting default properties

问题描述

我试图使用反射来实现以下目标：

I am trying to to use reflection to achieve the following:

我需要一种方法在那里我传递一个对象，并且此方法将递归实例化子对象对象和设置用默认值的属性。我需要整个对象实例化视需要将尽可能多的水平。

I need a method where i pass in an object and this method will recursively instantiate the object with child objects and set the properties with default values. I need the entire object instantiated going as many levels as needed.

此方法需要能够处理的对象与多个属性，将其它的目的的通用列表。

this method needs to be able to handle an object with a multiple properties that will be generic lists of other objects.

下面是我的示例代码（我得到的参数数量不匹配异常时，我得到包含对象的列表< AnotherSetObjects> ：

Here is my sample code (I am getting a parameter count mismatch exception when i get an object containing a List<AnotherSetObjects>:

private void SetPropertyValues(object obj)
{
    PropertyInfo[] properties = obj.GetType().GetProperties();

    foreach (PropertyInfo property in properties)
    {
        if (property.PropertyType.IsClass && property.PropertyType != typeof(string) && property.PropertyType.FullName.Contains("BusinessObjects"))
        {
            Type propType = property.PropertyType;

            var subObject = Activator.CreateInstance(propType);
            SetPropertyValues(subObject);
            property.SetValue(obj, subObject, null);
        }
        else if (property.PropertyType == typeof(string))
        {
            property.SetValue(obj, property.Name, null);
        }
        else if (property.PropertyType == typeof(DateTime))
        {
            property.SetValue(obj, DateTime.Today, null);
        }
        else if (property.PropertyType == typeof(int))
        {
            property.SetValue(obj, 0, null);
        }
        else if (property.PropertyType == typeof(decimal))
        {
            property.SetValue(obj, 0, null);
        }
    }
}

感谢

Thanks

推荐答案

您可以通过检查 property.PropertyType.IsGeneric 这是通用真正滤除容器。如果需要，还要检查 property.PropertyType.IsArray 。



此外，您还可能希望避免非通用容器。在这种情况下，测试对象为接口类型，例如容器的。例如 - 的IList

You can filter out by checking for property.PropertyType.IsGeneric which is true for generic containers. If you need, also check for property.PropertyType.IsArray.

Moreover, you may also want to avoid non-generic containers. In that case, test for object to be of interface types of such containers. Eg - IList.

bool isList(object data)
{
    System.Collections.IList list = data as System.Collections.IList;
    return list != null;
}

...
if (isList(obj)) {
    //do stuff that take special care of object which is a List
    //It will be true for generic type lists too!
}

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