[英]execute stored procedure from SqlQuery data reader issue
so i am trying to execute my stored procedure as folowing 所以我试图按照以下方式执行存储过程
String sql =
"SET NOCOUNT ON; " +
"DECLARE @id INT, @itemnumber nvarchar(20); " +
"SELECT @id= '" + car.ID + "'" +
"EXEC [file].[usp_iudCar] " +
"@p_ID=@id OUTPUT," +
"@p_Location= '" + location + "', " +
"@p_ItemNumber=@itemnumber OUTPUT, " +
"@p_DoerTicket= '" + userToken + "' " +
"SELECT @id AS id, @itemnumber AS itemNumber; ";
QueryParamCollection queryParams = new QueryParamCollection();
queryParams.AddInt32Param(QueryParamName.CarID, (object)car.ID);
queryParams.AddStringParam(QueryParamName.Location, (object)location);
queryParams.AddStringParam(QueryParamName.DoerTicket, (object)userToken);
var update = context.Database.SqlQuery<Int32>(sql).FirstOrDefault<Int32>();
return update;
similar to when i doing it from query on the server as 类似于我从服务器上的查询中进行操作时
DECLARE @return_value int,
@p_ID int,
@p_ItemNumber nvarchar(20)
SELECT @p_ID = 1783999
EXEC @return_value = [file].[usp_iudCar]
@p_ID = @p_ID OUTPUT,
@p_ItemNumber = @p_ItemNumber OUTPUT,
@p_Location = N'test',
@p_DoerTicket = N'0x0100000057065fc3a91f34c3f1f9cad41e2f5889bac6a68d3eab408dddc1cd54e57ce240565294f481f4f248bca4fb772d38fd737a6448dcbbfd9d58'
SELECT @p_ID as N'@p_ID',
@p_ItemNumber as N'@p_ItemNumber'
SELECT 'Return Value' = @return_value
GO
but i gets an execption 但我得到了执行
"ExceptionMessage": "The data reader has more than one field. Multiple fields are not valid for EDM primitive or enumeration types.",
“ ExceptionMessage”:“数据读取器具有多个字段。多个字段对于EDM基本类型或枚举类型无效。
so how do i fix that or what is the correct way to do this? 那么我该如何解决呢?或者正确的方法是什么呢?
This error: 这个错误:
"ExceptionMessage": "The data reader has more than one field. Multiple fields are not valid for EDM primitive or enumeration types.",
“ ExceptionMessage”:“数据读取器具有多个字段。多个字段对于EDM基本类型或枚举类型无效。
means that your stored procedure returns more than just one field. 意味着您的存储过程返回的不止一个字段。 This is what you are telling EF:
这就是您要告诉EF:
var update = context.Database.SqlQuery<Int32>(sql).FirstOrDefault<Int32>();
that the query returns a single field but clearly that is not the case or you would not get that error. 该查询返回单个字段,但显然不是这样,否则您将不会得到该错误。
Also that is not how to call a stored procedure using EF database first approach. 同样,这也不是使用EF数据库优先方法调用存储过程的方法。 Please refer this question and accepted answer for how to do what you want the proper way.
请参考此问题和已接受的答案,以了解如何正确地做自己想做的事情。
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