將 object 轉換為指定的 class

Question

我正在嘗試創建一個全局接口，它將接收不同類型的 class。我該如何轉換。

我如何傳遞並獲得 object 並將其轉換為特定的 class

public void Generate()
{
 Student s = new Student
{
 Id = Entry; // binded entry
};
 var student = method("Student",s)
   if(student != null)
{
 //binded labels
   Name = Student.Name;
   Gender = Student.Gender;
   Age = Student.Age;
   Course = Student.Course;
}
}


public async Task<object> method(string condition,object obj)
{
  switch(condition)
{
   case "Student":
         var student = get from database where id= obj.id;
         return student;
   case "Teacher":
         var teacher = get from database where id= obj.id;
         return Teacher;
}

}

問題是如何將傳遞的 object 轉換為特定類型的 class 以將其用於查詢數據庫。 與返回值相同

Answer 1

您可以將其轉換為您想要的特定 object

case "Student":
         var student = (obj as Student);
         var res = get from database where id= student?.id;
         return res;

在調用此方法后，您必須再次執行此操作：

var student = (method("Student",s).Result) as Studednt;

Answer 2

您可以在“方法”上使用模式匹配來轉換傳遞的 object 以將其用於查詢數據庫

public async Task<object> method(object obj)
{
    switch (obj)
    {
        case Student student:
            return (Student)null; // return  get from database where id = student.id;
        case Teacher teacher:
            return (Teacher)null; // return  get from database where id = teacher.id;
        default:
            break;
    }
}

然后

var s = new Student() { Id = 1 };
var result = await method(s);

if(result is not null && result is Student student)
{
    //binded labels
    //        Name = Student.Name;
    //        Gender = Student.Gender;
    //        Age = Student.Age;
    //        Course = Student.Course;
}