Linq where子句未過濾

Question

任何人都可以知道為什么此代碼可以正常運行：

EmployeeContextDataContext empContext = new EmployeeContextDataContext();

var departaments = empContext.Departments.Where(x => x.Name == "IT" || x.Name=="HR");

foreach (Department dept in departaments)
        {
         Response.Write(dept.Name);

         var empInDept = dept.Employees;

         foreach (var employee in empInDept)
            {
            Response.Write(employee.FirstName + employee.Gender);
            }
        }

然后我添加.Where（x => x.Gender ==“ Male”）; 它沒有在屏幕上扔東西嗎？

foreach (Department dept in departaments)
        {
        Response.Write(dept.Name);

        var empInDept = dept.Employees.Where(x => x.Gender =="Male");

        foreach (var employee in empInDept)
            {
            Response.Write(employee.FirstName);
            }
        }

Answer 1

您確定您有IT或HR方面的男性員工嗎？

如果這樣做，您確定“性別”列中的M大寫嗎？

嘗試刪除區分大小寫的方法：

var empInDept = dept.Employees.Where(x => x.Gender.ToLower().Trim() == "male");

Answer 2

您可以在x.Gender =="Male"表達式內放置一個斷點來逐步執行。