使用反射来迭代和更新特定属性类型的对象值

Question

我有一个employeesOfTheMonth类型的对象employeesOfTheMonth，它包含许多Employee和List<Employee>类型的属性。在某些情况下，给定员工的JobTitleUpdated字段的值包含更新的职位名称;在其他情况下，JobTitleUpdated字段为空。

public class Employee
{
public int EmployeeId {get; set; }
public string EmployeeName { get; set;}
public string? JobTitle { get; set; }
public string? JobTitleUpdated { get; set;}
public decimal Salary { get; set; }
public byte[] Photo { get; set; }
}
public class EmployeesOfTheMonth
{   
public string Company
public Employee EmployeeOfTheMonthLocation1 {get; set;}
public Employee EmployeeOfTheMonthLocation2 {get ;set;}
public Employee EmployeeOfTheMonthLocation3 {get; set;}
public List<Employee> EmployeesOfPriorMonthsLocation1 {get; set;}
public List<Employee> EmployeesOfPriorMonthsLocation2 {get; set;}
public List<Employee> EmployeesOfPriorMonthsLocation3 {get; set;}
public DateTime ModifiedDate { get; set; }
[... additional properties of various types snipped...]
}

使用反射，我想迭代employeesOfTheMonth的属性。如果属性是Employee类型的，并且给定Employee的JobTitleUpdated属性包含数据，那么我需要用JobTitleUpdated属性的值更新Employee的JobTitle的值。在List<Employee>的情况下，我需要遍历该列表并应用相同的逻辑，即使用JobTitleUpdated属性有条件地更新JobTitle。

这可以通过反射完成吗?

Answer 1

是的，您可以使用反射来遍历employeesOfTheMonth的属性，并在JobTitleUpdated属性包含数据时更新Employee对象的JobTitle属性。

下面是一个如何使用反射来做到这一点的例子:

Type type = employeesOfTheMonth.GetType();
foreach (PropertyInfo property in type.GetProperties())
{
if (property.PropertyType == typeof(Employee))
{
// Get the value of the property
Employee employee = (Employee)property.GetValue(employeesOfTheMonth);
// Update the JobTitle if JobTitleUpdated is not null
if (employee.JobTitleUpdated != null)
{
employee.JobTitle = employee.JobTitleUpdated;
}
}
else if (property.PropertyType == typeof(List<Employee>))
{
// Get the value of the property
List<Employee> employees = (List<Employee>)property.GetValue(employeesOfTheMonth);
// Iterate through the list and update the JobTitle if JobTitleUpdated is not null
foreach (Employee employee in employees)
{
if (employee.JobTitleUpdated != null)
{
employee.JobTitle = employee.JobTitleUpdated;
}
}
}
}

这段代码将遍历employeesOfTheMonth的属性，并检查该属性是Employee类型还是List类型。如果属性是Employee类型，如果JobTitleUpdated不为空，它将使用JobTitleUpdated的值更新JobTitle。如果属性是List类型，它将遍历列表，并对列表中的每个Employee对象应用相同的逻辑。