C#创建对象的5种方式

1. new()创建
2. Activator创建
3. Reflection创建
4. XmlSerializer创建
5. MemberwiseClone创建

Student类

[XmlRootAttribute("PurchaseOrder", Namespace = "http://www.cpandl.com", IsNullable = false)]
public class Student
{
    public override string ToString()
    {
        return "我是一个学生";

    }
    public Student? Clone()
    {
        return MemberwiseClone() as Student;
    }
}

使用new()创建

Student student = new Student();

Activator创建

Student student2 = Activator.CreateInstance<Student>();

Reflection创建

Student student3= (Student)Assembly.Load(strPath).CreateInstance(strName);

XmlSerializer创建

void CreatePO(string filename)
{
    XmlSerializer serializer =
    new XmlSerializer(typeof(Student));
    TextWriter writer = new StreamWriter(filename);
    Student po = new Student();
    serializer.Serialize(writer, po);
    writer.Close();
}
void ReadPO(string filename)
{

    XmlSerializer serializer = new XmlSerializer(typeof(Student));
    FileStream fs = new FileStream(filename, FileMode.Open);
    Student? po = serializer.Deserialize(fs) as Student;
}

CreatePO("po.xml");
ReadPO("po.xml");

MemberwiseClone创建

Student? student5 = student.Clone();