Question

任何人都可以知道为什么这段代码正常运行：

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);
            }
        }

我添加的那一刻。其中（x =＆gt; x.Gender ==“男”）;它不会在屏幕上抛出任何东西？

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

您确定您拥有IT或HR的男性员工吗？

如果你这样做，你确定性别列的M大写吗？

尝试删除区分大小写：

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

Answer 2

您可以在<{1}}表达式中放置一个断点来逐步执行它。

Linq where子句不过滤

2 个答案: