MVC - 在Northwind DB中创建Controller Action CreateNewEmployee-Java 学习之路

我尝试在MVC中创建一个新的Employee . 控制器：

HireEmployeeBL.EmployeeBL employeeBl = new HireEmployeeBL.EmployeeBL();

    public ActionResult HireNew(int id)
{
    return View();
}

[HttpPost]
public ActionResult HireNew(int id, Employee employee)
{
    employee.ReportsTo = new Manager { EmployeeID = id };
    employeeBl.AddEmployee(employee);
    return RedirectToAction("Subordinates");
    //return View();
}

服务器错误：

参数字典包含非可空类型'System.Int32'的参数'id'的空条目，用于'MvcEmployee.Controllers.EmployeeController'中方法'System.Web.Mvc.ActionResult HireNew（Int32）' . 可选参数必须是引用类型，可空类型，或者声明为可选参数 . 参数名称：参数

1 回答

[HttpPost]
        public ActionResult Create(Employee employee)
        {
            try
            {
                NorthwindEntities northwindEntities = new NorthwindEntities();
                northwindEntities.Employees.Add(employee);
                northwindEntities.SaveChanges(); 

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

回复于 2024-05-16T14:21:04+08:00

MVC - 在Northwind DB中创建Controller Action CreateNewEmployee

1 回答

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