C# 无法将integer类型隐式转换为bool

希望你能在这个问题上帮助我。我之前搜索过一些问题，但是 无法使用提供的答案解决此问题。 我在where子句中得到错误“不能隐式地将integer类型转换为bool”。 此时
数据库中的SchoolMasterID列和通过构造函数提供的Id都
具有整数类型

public List<SchoolmasterIndexView> GetdSchoolMaster(EduDbContext db, int Id)
{
   var _schoolmaster = from n in db.SchoolMasters
   join c in db.Address on n.AddressID equals c.AddressID
   where **n.SchoolMasterID = Id**
   orderby n.SchoolMasterName
   select new SchoolmasterIndexView()
   {
      SchoolMasterID = n.SchoolMasterID,
      SchoolMasterName = n.SchoolMasterName,
      AddressID = c.AddressID,
      AddressLine1 = c.AddressLine1,
      AddressLine2 = c.AddressLine2,
      PostalCode = c.PostalCode,
      City = c.City
                   };
      return _schoolmaster.ToList();
    }
}

public List GetdSchoolMaster（EduDbContext db，int-Id）
{
var_schoolmaster=从n开始，单位为db.schoolmaster
在n.AddressID上的db.Address中加入c等于c.AddressID
其中**n.SchoolMasterID=Id**
校名
选择新的SchoolmasterIndexView（）
{
SchoolMasterID=n.SchoolMasterID，
SchoolMasterName=n.SchoolMasterName，
AddressID=c.AddressID，
AddressLine1=c.AddressLine1，
AddressLine2=c.AddressLine2，
PostalCode=c.PostalCode，
城市
};
return_school master.ToList（）；
}
}

您需要在

where

子句中使用相等运算符而不是赋值运算符

var _schoolmaster = from n in db.SchoolMasters
                    join c in db.Address on n.AddressID equals c.AddressID
                    where n.SchoolMasterID == Id //<--equality operator
                    orderby n.SchoolMasterName
                    ...

编译器触发完全相同的错误

无法将类型“int”隐式转换为“bool”

出现此错误，因为赋值运算符返回赋值。例如：

int a;
var b = a = 2; //result of "a = 2" expression is 2 and then assigned to b 

Console.WriteLine(b); //prints 2. Two variables both have value 2

---

在Linq

where

中，子句期望

bool

但获取

int

类型。这就是为什么编译器抱怨说，它不能将

int

转换为

bool
您需要在
where
子句中使用相等运算符而不是赋值运算符

var _schoolmaster = from n in db.SchoolMasters
                    join c in db.Address on n.AddressID equals c.AddressID
                    where n.SchoolMasterID == Id //<--equality operator
                    orderby n.SchoolMasterName
                    ...

编译器触发完全相同的错误
无法将类型“int”隐式转换为“bool”

出现此错误，因为赋值运算符返回赋值。例如：

int a;
var b = a = 2; //result of "a = 2" expression is 2 and then assigned to b 

Console.WriteLine(b); //prints 2. Two variables both have value 2

在Linq
where
中，子句期望
bool
但获取
int
类型。这就是为什么编译器抱怨它不能将
int
转换为
bool