我正在研究可以傳入2個相同類型對象的方法,它將比較這兩個對象。最後,我打算重載它以接受財產等名稱,只評估那些或僅排除那些形成評估。在完成基本的全面比較工作後,這將會發生。比較對象的方法
我已經能夠比較值類型和引用類型。我卡住的地方是能夠比較Enumerable的屬性。 else
聲明是我無法正常工作的聲明。
public static void CompareObjects<T>(T obj1, T obj2)
{
foreach (var property in typeof(T).GetProperties())
{
var obj1Prop = property.GetValue(obj1);
var obj2Prop = property.GetValue(obj2);
//for value types
if (property.PropertyType.IsPrimitive || property.PropertyType.IsValueType || property.PropertyType == typeof(string))
{
if (obj1Prop != obj2Prop)
Console.WriteLine($"Object 1 {property.Name}:{obj1Prop}{Environment.NewLine}Object 2 {property.Name}:{obj2Prop}{Environment.NewLine}");
}
//for objects
else if (property.PropertyType.IsClass && !typeof(IEnumerable).IsAssignableFrom(property.PropertyType))
{
dynamic obj1PropObj = Convert.ChangeType(obj1Prop, property.PropertyType);
dynamic obj2PropObj = Convert.ChangeType(obj2Prop, property.PropertyType);
CompareObjects(obj1PropObj, obj2PropObj);
}
//for Enumerables
else
{
var enumerablePropObj1 = property.GetValue(obj1) as IEnumerable;
var enumerablePropObj2 = property.GetValue(obj2) as IEnumerable;
if (enumerablePropObj1 == null) continue;
if (enumerablePropObj2 == null) continue;
var list1 = enumerablePropObj1.GetEnumerator();
var list2 = enumerablePropObj2.GetEnumerator();
while (list1.MoveNext())
{
list2.MoveNext();
CompareObjects(list1.Current, list2.Current);
}
}
}
}
這遍歷整個列表,但沒有值。我用來實現此設置如下:
static void Main(string[] args)
{
var student1 = new Student
{
FirstName = "John",
LastName = "Smith",
Age = 18,
DateOfBirth = DateTime.Parse("1989/03/03"),
Job = new Job
{
Company = "CompanyOne",
Title = "Supervisor"
},
PhoneNumbers = new List<PhoneNumber>
{
new PhoneNumber
{
Number = "8675309",
Label = "Home"
},
new PhoneNumber
{
Number = "1234567",
Label = "Work"
}
}
};
var student2 = new Student
{
FirstName = "Theodore",
LastName = "Smith",
Age = 22,
DateOfBirth = DateTime.Parse("1990/03/03"),
Job = new Job
{
Company = "CompanyOne",
Title = "Manager"
},
PhoneNumbers = new List<PhoneNumber>
{
new PhoneNumber
{
Number = "8675308",
Label = "Home"
},
new PhoneNumber
{
Number = "1234567",
Label = "Work"
}
}
};
CompareObjects(student1, student2);
Console.WriteLine("Done");
Console.ReadKey();
}
[is-a-built -in-method-to-compare-collections-in-c#](http://stackoverflow.com/q/43500/463206) – radarbob
SequenceEqual不會工作,因爲如果t他enumerable是具有集合屬性的對象的集合。遞歸調用需要通過將列表中的每個對象傳遞給該對象,然後由該方法在其自己的迭代中進行評估。 –