比较两个对象的 C# 问题

Question

我正在尝试比较 2 个具有属性和子属性的对象。即使对象值匹配，下面的代码也总是 return false。在这种情况下比较的最佳选择是什么？

Student a = new Student();
a.Name = "john";
a.Address ="CA";                        
//a.StudDetails.Location = "LA";
//a.StudDetails.Study = "MBA";
//a.StudDetails.Friends = new string[] { "X", "Y"};

Student b = new Student();
b.Name = "john";
b.Address = "CA";
//b.StudDetails.Location = "LA";
//b.StudDetails.Study = "MBA";
//b.StudDetails.Friends = new string[] { "X", "Y"};
bool x = Equals(a, b);
if (x)
{
    Console.WriteLine("matched");
}
else
{
    Console.WriteLine("Not Matched");
}


public class Student
{
    public string Name;
    public Details StudDetails;
    public string Address;
}

public class Details
{
    public string Study;
    public string Location;
    public string[] Friends;
}

Answer 1

您必须对 Student 实施 Equals https://msdn.microsoft.com/en-us/library/336aedhh(v=vs.100).aspx

public class Details
{
    public string Study;
    public string Location;
    public string[] Friends;
}

public class Student
{
  public string Name;
  public Details StudDetails;
  public string Address;  

  public override bool Equals(Object obj) 
  {
  // Check for null values and compare run-time types.
  if (obj == null || GetType() != obj.GetType()) 
   return false;

  Student s = (Student)obj;
  return (Name == s.Name) && (Address == s.Address);
  }
}

Student a = new Student();
a.Name = "john";
a.Address ="CA";                        
//a.StudDetails.Location = "LA";
//a.StudDetails.Study = "MBA";
//a.StudDetails.Friends = new string[] { "X", "Y"};

Student b = new Student();
b.Name = "john";
b.Address = "CA";
//b.StudDetails.Location = "LA";
//b.StudDetails.Study = "MBA";
//b.StudDetails.Friends = new string[] { "X", "Y"};

bool x = a.Equals(b);
Console.WriteLine( x );

此代码打印 "True".

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