如何将值从动态SQL存储过程返回到实体框架？

Question

我有一个存储过程,它执行一些动态SQL.我想在实体框架4中使用此存储过程,但是当我尝试创建复杂类型时,过程不返回任何列.有什么办法可以强迫它返回我的值并让实体框架接收它们吗？这是我想要做的简化示例:

CREATE PROCEDURE sp_calculatesalary(@EmployeeId as int)
begin
    declare dynsql as varachar(500)
    @dynsql='Select @Salary=Salary,@UserName=Username from employee
            where EmployeeId='+cast(@EmployeeId as varchar)+ ''
    exec(@dynsql)
    select @Salary, @UserName
end

但这不起作用.请帮帮我.基本上,我想使用存储过程来执行动态SQL并将值返回到实体框架.

Answer 1

如果必须进行动态查询,也许可以考虑参数化SQL:

CREATE PROCEDURE sp_calculatesalary(@EmployeeId as int)  
as 
begin   
    declare @dynsql varchar(500)   
    declare @params nvarchar(500)
    declare @salary money
    declare @username varchar(50)
    set @dynsql='Select @sal=Salary,@usernm=Username from employee where EmployeeId=@empID'   
    set @params='@empID int, @sal money OUTPUT, @usernm varchar(50) OUTPUT'
    exec sp_executesql @dynsql, @params, @empID=@EmployeeID, @sal=@salary OUTPUT, @usernm = @username OUTPUT
    SELECT @salary, @username
end