递归获取类的属性和子属性

  • Z时代
  • 2024-01-10
  • 分类：问答

我在做类似

递归获取对象的属性和子属性的操作，但是我想递归使用反射来获取每个属性。我从递归打印属性中获得了代码。

代码的问题是：它仅下降了一层，我想知道如何使用反射自动获取所有属性？我只是组成了以下示例容器代码：

public class Container
{
    public Bottle MyBottle { get; set; }
    public List<Address> Addresses { get; set; }
    public Container()
    {
        Address a = new Address();
        a.AddressLine1 = "1 Main St";
        a.AddressLine2 = "2 Main St";
        Addresses = new List<Address>();
        Addresses.Add(a);
        MyBottle = new Bottle();
        MyBottle.BottleName = "Big bottle";
        MyBottle.BottageAge = 2;
    }
}
public class Bottle
{
    public string BottleName { get; set; }
    public int BottageAge { get; set; }
}
public class Address
{
    public string AddressLine1 { get; set; }
    public string AddressLine2 { get; set; }
    public List<SpecialFolder> SpecialFolders { get; set; }
    public Address()
    {
        SpecialFolders = new List<SpecialFolder>();
        SpecialFolder sf = new SpecialFolder();
        sf.TemplateFolder = Environment.SpecialFolder.Templates.ToString();
        sf.UserFolder = Environment.SpecialFolder.UserProfile.ToString();
        SpecialFolders.Add(sf);
    }
}
public class SpecialFolder
{
    public string TemplateFolder { get; set; }
    public string UserFolder { get; set; }
}

在Main方法中：

static void Main(string[] args)
{
    Container c = new Container();
    PrintProperties(c);
}
public static void PrintProperties(object obj)
{
    PrintProperties(obj, 0);
}
public static void PrintProperties(object obj, int indent)
{
    if (obj == null) return;
    string indentString = new string(' ', indent);
    Type objType = obj.GetType();
    PropertyInfo[] properties = objType.GetProperties();
    foreach (PropertyInfo property in properties)
    {
        object propValue = property.GetValue(obj, null);
        if (property.PropertyType.Assembly == objType.Assembly)
        {
            Console.WriteLine("{0}{1}:", indentString, property.Name);
            PrintProperties(propValue, indent + 2);
        }
        else
        {
            Console.WriteLine("{0}{1}: {2}", indentString, property.Name, propValue);
        }
    }
}

我希望得到：

MyBottle:
      BottleName: Big bottle
      BottageAge: 2
Addresses:
      AddressLine1: 1 Main St
      AddressLine2: 2 Main St
      SpecialFolders:
            TemplateFolder: Templates
            UserFolder: UserProfile

我现在得到的结果是：

MyBottle:
  BottleName: Big bottle
  BottageAge: 2
Addresses: System.Collections.Generic.List`1[TreeViewReflectionExample.Address]

有人可以通过PrintProperties方法帮助我吗？非常感谢你。

回答：

您的代码有两个问题：

  1. 因为条件的缘故，if (property.PropertyType.Assembly == objType.Assembly)你会System.Collections像List<>

  2. 您不会对propValue集合有不同的对待。因此它将打印List属性，而不是其元素属性。

您可以将其更改为例如：

public void PrintProperties(object obj, int indent)
{    
    if (obj == null) return;
    string indentString = new string(' ', indent);
    Type objType = obj.GetType();
    PropertyInfo[] properties = objType.GetProperties();
    foreach (PropertyInfo property in properties)
    {
        object propValue = property.GetValue(obj, null);
        var elems = propValue as IList;
        if (elems != null)
        {
            foreach (var item in elems)
            {
                PrintProperties(item, indent + 3);
            }
        }
        else
        {
            // This will not cut-off System.Collections because of the first check
            if (property.PropertyType.Assembly == objType.Assembly)
            {
                Console.WriteLine("{0}{1}:", indentString, property.Name);
                PrintProperties(propValue, indent + 2);
            }
            else
            {
                Console.WriteLine("{0}{1}: {2}", indentString, property.Name, propValue);
            }
        }
    }
}

以上是 递归获取类的属性和子属性 的全部内容， 来源链接： utcz.com/qa/420192.html

回到顶部