c# – 不同属性的通用foreach循环

我试图使用foreach循环的泛型方法,它将传递不同的参数作为参数.

在下面的这个例子中,我想传递不同的参数(EmployeeDisplayOrder或EmployeeEnrollOrder)

public void SaveEmployeeDisplayOrder(ICollection<Employee> employees)
{
   //some code

   foreach( var emp in employees)
   {
      UpdateSpecificEmployeeOrder(employee.id, e => e.EmployeeDisplayOrder);
   }
}

public void SaveEmployeeEnrollOrder(ICollection<Employee> employees)
{
   //some code

   foreach( var emp in employees)
   {
     UpdateSpecificEmployeeOrder(employee.id, e => e.EmployeeEnrollOrder);
   }
}

我想要这样的东西

public void UpdateEmployeeOrders(ICollection<Employee> employee)
{ 
  foreach( var emp in employees)
  {
    UpdateSpecificEmployeeOrder(employee.id, //generic property);
  }
}

并从SaveEmployeeDisplayOrder和SaveEmployeeEnrollOrder调用此UpdateEmployeeOrders泛型方法.

UpdateSpecificEmployeeOrder的方法签名

UpdateSpecificEmployeeOrder( int employeeid, params Expression<Func<Employee, object>>[] property)

这可能吗？

解决方法:

你的答案中有答案……你正在使用lambdas ……所以在你的方法中传递一个委托.

public void SaveEmployeeDisplayOrder<T>(ICollection<Employee> employees, Func<Employee, T> fetchProperty)
{
   //some code

   foreach( var employee in employees)
   {
      UpdateSpecificEmployeeOrder(employee.id, fetchProperty(employee));
   }
}

然后你会把它称之为你所拥有的：

SaveEmployeeDisplayOrder(employees, e => e.EmployeeDisplayOrder);

要么

SaveEmployeeDisplayOrder(employees, e => e.EmployeeEnrollOrder);

标签：c,foreach,generics,generic-collections,generic-method
来源： https://codeday.me/bug/20190716/1477856.html