EF 怎么调用存储过程并获得output参数

ALTER PROCEDURE [dbo].[P_FindAnZhiRen]
@tempP_ID int output
,@Member_ID int
,@Is_Right bit
AS

set @tempP_ID =@Member_ID
BEGIN

if @Is_Right =0
begin
While(Exists(select 1 from tbMemberInfo where Parent_ID=@tempP_ID and Is_Right=0))
begin
select @tempP_ID=Member_ID from tbMemberInfo where Parent_ID=@tempP_ID and Is_Right=0
end
end

if @Is_Right =1
begin
if(Exists(select 1 from tbMemberInfo where Parent_ID=@tempP_ID and Is_Right=1))
begin
select @tempP_ID=Member_ID from tbMemberInfo where Parent_ID=@tempP_ID and Is_Right=1
end

While(Exists(select 1 from tbMemberInfo where Parent_ID=@tempP_ID and Is_Right=0))
begin
select @tempP_ID=Member_ID from tbMemberInfo where Parent_ID=@tempP_ID and Is_Right=0
end
end

END

var tempP_ID = new ObjectParameter("tempP_ID", typeof(Int32));
var result = db.P_FindAnZhiRen(tempP_ID, 1, false );
var result1 = tempP_ID.Value;

result1就是output的值