EF6存储过程必须声明标量变量
本文关键字:标量 变量 声明 存储过程 EF6 | 更新日期: 2023-09-27 18:13:05
我正在尝试使用c# EF6调用存储过程来带回数据。我试图在SQL管理工作室运行存储过程,它似乎工作得很好,但是当我试图在我的应用程序中运行它时,我得到一个错误说"Must declare the scalar variable "@devID"
public IHttpActionResult GetMetrics(int deviceID, string attribute, string startDate)
{
if (deviceID == 0)
{
return NotFound();
}
var metrics = db.Database.SqlQuery<Metrics>("GetMetrics @devID, @MetricType, @startTime", deviceID, attribute, startDate).ToList();
,这是我的存储过程:
ALTER PROCEDURE [dbo].[GetMetrics]
-- Add the parameters for the stored procedure here
@devID int,
@MetricType nvarchar(20),
@startTime nvarchar(50)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- Insert statements for procedure here
SELECT *
FROM dbMetrics
WHERE deviceID = @devID and MetricType = @MetricType and timeStamp >= @startTime
ORDER BY timeStamp
END
根据文档,如果您想使用命名参数,则需要像这样传递SqlParameter
对象:
var metrics = db.Database.SqlQuery<Metrics>("GetMetrics @devID, @MetricType, @startTime",
new SqlParameter("devID", deviceID),
new SqlParameter("MetricType", attribute),
new SqlParameter("startTime", startDate)
).ToList();