如何使用EF执行带有输入和输出参数的存储过程? [英] How to execute stored procedure with input and output parameters using EF?
问题描述
我正在使用 EF 代码优先方法,并且我使用迁移创建了存储过程,如下所示:
I am using EF code first approach and I have created stored procedure using migration as following:
public override void Up()
{
Sql(@"CREATE TYPE IdsList AS TABLE
(
Id Int
)
GO
Create Procedure getChildIds(
@IdsList dbo.IdsList ReadOnly
)
As
Begin
WITH RecursiveCTE AS
(
SELECT Id
FROM dbo.PhysicalObjects
WHERE ParentId in (Select * from @IdsList)
--Where Id=108
UNION ALL
SELECT t.Id
FROM dbo.PhysicalObjects t
INNER JOIN RecursiveCTE cte ON t.ParentId = cte.Id
)
SELECT * FROM RecursiveCTE
End");
}
public override void Down()
{
Sql(@"Drop Type IdsList
Go
Drop Procedure getChildIds");
}
现在如果我去 sql server management studio 并执行以下脚本:
Now If I go to sql server management studio and execute the following scripts:
Declare @Ids dbo.IdsList
Insert into @Ids
SELECT 1
Exec getChildIds @Ids
它将成功执行,但现在我正在尝试执行该存储过程,如下所示:
It will execute successfuly, but Now I am trying to execute that stored procedure as following:
var idsList = new SqlParameter {ParameterName = "idsList", Value = new int[] { 1,2,3,4,5} };
var idParams = new SqlParameter("idParams", SqlDbType.Structured)
{
Direction = System.Data.ParameterDirection.Output
};
var results = dbContext.Database.SqlQuery<int>("getChildIds @idsList, @idParams out", idsList,idParams) ;
var idsResult = (List<int>)idParams.Value;
它不返回任何东西.
那么如何使用 Table 类型的输入和输出参数执行存储过程?
So how I could execute stored procedure with input and output parameters of type Table?
推荐答案
我是这样解决的.
首先,我更新了我的存储过程以返回如下 ID:
First of all I have updated my stored procedure to return Ids as following:
public override void Up()
{
Sql(@"CREATE TYPE IdsList AS TABLE
(
Id Int
)
GO
Create Procedure getChildIds(
@IdsList dbo.IdsList ReadOnly
)
As
Begin
WITH RecursiveCTE AS
(
SELECT Id
FROM dbo.PhysicalObjects
WHERE ParentId in (Select * from @IdsList)
UNION ALL
SELECT t.Id
FROM dbo.PhysicalObjects t
INNER JOIN RecursiveCTE cte ON t.ParentId = cte.Id
)
SELECT Id From RecursiveCTE
End");
}
public override void Down()
{
Sql(@" Drop Procedure getChildIds
Go
Drop Type IdsList
");
}
这里是我如何使用实体框架解决执行存储过程的:
And here how I have solved executing stored procedure using entity framework:
var dataTable = new DataTable();
dataTable.TableName = "idsList";
dataTable.Columns.Add("Id", typeof(int));
dataTable.Rows.Add(1);
dataTable.Rows.Add(2);
SqlParameter idsList = new SqlParameter("idsList", SqlDbType.Structured);
idsList.TypeName = dataTable.TableName;
idsList.Value = dataTable;
var results = dbContext.Database.SqlQuery<int>("exec getChildIds @idsList", idsList).ToList();
我希望我的代码能帮助其他有同样问题的人
I hope my code will help others having the same issue
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