C#循环/遍历对象以获取具有复杂属性类型的属性值

时间:2016-06-15 19:27:06

标签: c# loops reflection

我试图找到一种方法来遍历并遍历一个对象,以获取对象的所有属性(它们的名称和值)。我可以成功地遍历简单属性(例如字符串,int等等),但是当它具有包含属性的属性时 - 这就是问题所在......

[ Working for Simple string/int/bool properties ], but I need something that will work with nested / complex property types.

            foreach (PropertyInfo spotProperties in spot.GetType().GetProperties())
            {
                // Simple property type (string, int, etc...)  add the property and its value to the node.
                var attributeName = spotProperties.Name; 
                resultElement.Add(new XElement(attributeName, spotProperties.GetValue(spot, null)));
            }

我想要完成的示例代码,但无法开始工作 //无法通过复杂的属性类型进行工作循环。

            foreach (PropertyInfo spotProperties in spot.GetType().GetProperties())
            {
                if (--spotProperties is complex type then --)
                {
                    // The item is a complex data type, and needs to have it's properties iterated and added to the node.
                    foreach (PropertyInfo childSpotProperty in spotProperties.GetValue(spot, null).GetType().GetProperties())
                    {
                        var attributeName = ((DisplayNameAttribute)childSpotProperty.GetCustomAttributes(typeof(DisplayNameAttribute), false).FirstOrDefault() as DisplayNameAttribute)?.DisplayName ?? childSpotProperty.Name;
                        //resultElement.Add(new XElement(attributeName, childSpotProperty.GetValue(childSpotProperty, null)));
                    }
                }
                else
                {
                    // Simple property type (string, int, etc...)  add the property and its value to the node.
                    var attributeName = spotProperties.Name;
                    resultElement.Add(new XElement(attributeName, spotProperties.GetValue(spot, null
                }
            }

如果有人有任何想法,请告诉我。谢谢,我感谢任何反馈。

2 个答案:

答案 0 :(得分:3)

你可以根据自己的喜好对其进行重构,但它应该完成基本的工作。它使用一些递归来遍历复杂对象中的所有属性。它还处理可枚举的属性。

public class PropertyInformation
{
    public string Name { get; set; }
    public object Value { get; set; }
}

public static List<PropertyInformation> ObjectPropertyInformation(object obj)
{
    var propertyInformations = new List<PropertyInformation>();

     foreach (var property in obj.GetType().GetProperties())
    {
        //for value types
        if (property.PropertyType.IsPrimitive || property.PropertyType.IsValueType || property.PropertyType == typeof(string))
        {
            propertyInformations.Add(new PropertyInformation { Name = property.Name, Value = property.GetValue(obj) });
        }
        //for complex types
        else if (property.PropertyType.IsClass && !typeof(IEnumerable).IsAssignableFrom(property.PropertyType))
        {
            propertyInformations.AddRange(ObjectPropertyInformation(property.GetValue(obj)));
        }
        //for Enumerables
        else
        {
            var enumerablePropObj1 = property.GetValue(obj) as IEnumerable;

            if (enumerablePropObj1 == null) continue;

            var objList = enumerablePropObj1.GetEnumerator();

            while (objList.MoveNext())
            {
                objList.MoveNext();
                ObjectPropertyInformation(objList.Current);
            }
        }
    }

    return propertyInformations;
}

答案 1 :(得分:0)

这就像一个冠军,但它确实有一个错误(也许为什么不投票?)

修复如下所示:

//for Enumerables
else
{
    var enumerablePropObj1 = property.GetValue(obj) as IEnumerable;

    if (enumerablePropObj1 == null) continue;

    var objList = enumerablePropObj1.GetEnumerator();

    while (objList.MoveNext())
    {
==         if(objList.Current != null)
==         {
==             propertyInformations.AddRange(ObjectPropertyInformation(objList.Current));
==         }
    }