递归获取属性 &类的子属性 [英] Recursively Get Properties & Child Properties Of A Class
问题描述
我正在做类似递归获取属性&对象的子属性,但我想递归地使用反射来获取每个属性.我从递归打印属性获得了代码.
I was doing something like Recursively Get Properties & Child Properties Of An Object, but I wanted to use reflection recursively to get each properties. And I got the code from Recursively Print the properties.
代码的问题是:只往下一层,不知如何使用反射自动获取所有属性?我刚刚编写了以下示例容器代码:
The problem with the code is: it only goes one level down, I wonder how can you automatically get all the properties using reflection? I just made up the following sample Container code:
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:
In the Main method:
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:
MyBottle:
BottleName: Big bottle
BottageAge: 2
Addresses: System.Collections.Generic.List`1[TreeViewReflectionExample.Address]
有人可以帮助我使用 PrintProperties 方法吗?非常感谢.
Can someone help me with the PrintProperties method? Thank you very much.
推荐答案
您的代码有两个问题:
- 因为条件
if (property.PropertyType.Assembly == objType.Assembly)
你将省略System.Collections
就像List<>
- 您不会区别对待集合的
propValue
.因此它将打印List
属性,而不是它的元素属性.
- because of condition
if (property.PropertyType.Assembly == objType.Assembly)
you will omitSystem.Collections
likeList<>
- you do not treat differently
propValue
that are collections. Hence it will printList
properties, not its elements properties.
例如,您可以将其更改为:
You can change that for example into:
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);
}
}
}
}
这篇关于递归获取属性 &类的子属性的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!