如何在C#中递归地从嵌套类中检索成员字段

本文关键字：嵌套 检索 字段 成员 递归 | 更新日期: 2023-09-27 18:19:35

我正在调用一个方法GetEmployee()，该方法返回类型为Employee的值并存储在emp变量中。

var emp = GetEmployee();

我需要检索Employee类的所有成员字段，如年龄、姓名，以及嵌套类（如）的成员

[Address->DoorNum,Street,Zip]
[Phone->mobile,homePhone],
[Dependents->name,age,
[phone->mobile,homePhone]]

从CCD_ 4变量递归地生成。

类结构如下：

class Employee
{
 int age;
 string name
 Address address;
 Phone[] phones;
 Dependents[] dependents;
}
class Address
{
 int DoorNum;
 string Street;
 int Zip;
}
class Phone
{
 string mobile;
 string homePhone;
}
class Dependents
{
 string name;
 int age;
 Phone depPhone;
}

你能帮我怎样才能做到这一点吗？

如何在C#中递归地从嵌套类中检索成员字段

如果您谈论的是在运行时动态检索字段，这里有一个简单的递归示例，旨在说明而非实用性。请注意，默认情况下，类字段被推断为私有字段。

public static void listFields(Type type, bool sameNamespace, int nestLevel = 1) {
    BindingFlags bf = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance;
    Console.WriteLine("'r'n{0}Fields of {1}:", tabs(nestLevel - 1), type.Name);
    foreach (FieldInfo f in type.GetFields(bf)) {
        Console.WriteLine("{0}{1} {2} {3}", tabs(nestLevel), (f.IsPublic ? "public" : "private"), f.FieldType.Name, f.Name);
        Type fieldType = (f.FieldType.IsArray) ? f.FieldType.GetElementType() : f.FieldType;
        if ((type != fieldType) && (!sameNamespace || fieldType.Namespace == type.Namespace)) {
            listFields(fieldType, sameNamespace, nestLevel + 2);
        }
    }
    Console.WriteLine();
}
private static String tabs(int count) { return new String(' ', count * 3); }

listFields(typeof(Employee), true);:输出

Fields of Employee:
   private Int32 age
   private String name
   private Address address
      Fields of Address:
         private Int32 DoorNum
         private String Street
         private Int32 Zip
   private Phone[] phones
      Fields of Phone:
         private String mobile
         private String homePhone
   private Dependents[] dependents
      Fields of Dependents:
         private String name
         private Int32 age
         private Phone depPhone
            Fields of Phone:
               private String mobile
               private String homePhone

如果您想实际获得实例的字段值，可以使用FieldInfo.GetValue(object)

我终于得到了问题的答案：

public Employee getEmployee() 
{
    var emp=EmployeeProxy.GetEmployee();         
    return new Employee {        
    name=emp.Name,         
        age=emp.Age,         
        address=emp.AddressType.Select(a=>new Address{        
             DoorNum=a.doorNum,        
             Street=ae.street,        
             Zip=a.zip,        
        }),        
        phones=new Phone[]{        
             mobile=PhoneType.Mobile,        
             homePhone=PhoneType.HomePhone,        
        },        
        dependents=emp.DependentsType.Select(d=>new Dependents{        
             name=d.Name,        
             age=d.Age,        
             depPhone=new Phone{        
                     mobile=d.DependentPhone.Mobile,        
                     homePhone=d.DependentPhone.HomePhone,        
             },        
        }),         
    }; //End of Return        
} //End of method
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