尝试从我的C#代码运行存储过程时出错

我有以下存储过程：

CREATE PROCEDURE ListQuestionIds
    @ExamId int
AS
BEGIN

    SELECT Question.QuestionUId
    FROM Objective
    INNER JOIN ObjectiveDetail
        ON ( Objective.objectiveId = ObjectiveDetail.objectiveId )
    INNER JOIN ObjectiveTopic
        ON ( ObjectiveDetail.ObjectiveDetailId = ObjectiveTopic.ObjectiveDetailId )
    INNER JOIN Problem
        ON ( ObjectiveTopic.SubTopicId = Problem.SubTopicId )
    INNER JOIN Question
        ON ( Problem.ProblemId = Question.ProblemId )
    WHERE Objective.examId = @ExamId;

END;

var b = db.Database.SqlQuery<string>("dbo.ListQuestionIds", 1);

我使用的是EF6.1，我有一个db上下文。下面是我如何尝试调用存储过程：

CREATE PROCEDURE ListQuestionIds
    @ExamId int
AS
BEGIN

    SELECT Question.QuestionUId
    FROM Objective
    INNER JOIN ObjectiveDetail
        ON ( Objective.objectiveId = ObjectiveDetail.objectiveId )
    INNER JOIN ObjectiveTopic
        ON ( ObjectiveDetail.ObjectiveDetailId = ObjectiveTopic.ObjectiveDetailId )
    INNER JOIN Problem
        ON ( ObjectiveTopic.SubTopicId = Problem.SubTopicId )
    INNER JOIN Question
        ON ( Problem.ProblemId = Question.ProblemId )
    WHERE Objective.examId = @ExamId;

END;

var b = db.Database.SqlQuery<string>("dbo.ListQuestionIds", 1);

var b=db.Database.SqlQuery（“dbo.listQuestionId”，1）； 它给了我一个错误，说它需要参数@ExamId，但没有提供任何参数

有人能告诉我我做错了什么吗？

你必须使用

SqlParameter param = new SqlParameter("@ExamId", 1);
db.Database.ExecuteSqlCommand("dbo.ListQuestionIds",param);

或者你也可以使用

db.Database.SqlQuery<string>("exec dbo.ListQuestionIds @ExamId",1);

db.Database.SqlQuery（“exec dbo.ListQuestionIds@ExamId”，1）；

这应该可以解决您的问题

 db.Database.SqlQuery<string>("dbo.ListQuestionIds @ExamId", 
new SqlParameter { ParameterName = "ExamId", Value = 1 });

db.Database.SqlQuery（“dbo.ListQuestionIds@ExamId”，
新的SqlParameter{ParameterName=“ExamId”，值=1}）；