如何从.net核心实体框架使用表值参数调用存储过程 [英] How to call stored procedure with table valued parameter from .net core Entity Framework

问题描述

我有一个带有表值参数的存储过程。
我必须从.net核心中的实体框架中调用它。

I have a stored procedure with table valued parameter. I have to call it from Entity framework in .net core.

我在上下文对象上找不到任何API。

I couldn't find any API on context object.

我已经尝试过ADO.net API，它可以工作，但是现在我必须从.net核心中的EF调用它。我必须调用的存储过程必须返回返回的结果。

I have tried with ADO.net API's and it worked but now I have to call it from EF in .net core. Stored procedure which I have to call returning result which I have to catch.

我的样本SP如下

CREATE PROCEDURE [dbo].[GetMyData] 
@MyRequest [dbo].[MyRequestType] Readonly
As 
BEGIN

--Its sample SP thats why returned request table as it is    
select * from @MyRequest


END

MyRequestType 是用户定义的表类型

其结构如下

CREATE TYPE [dbo].[MyRequestType] AS TABLE(
    [Id] [numeric](22, 8) NULL,
    [Col1] [bigint] NULL,
    [Col2] [numeric](22, 8) NULL 
) 

我在EF内核中使用代码优先方法

I am using Code first approach in EF core

任何

推荐答案

最后，我可以从使用EF的.net核心服务中调用表值参数存储过程。核心

Finally I could able to call Table values parameter Stored procedure from my .net core service which uses EF core

我创建了伪造的响应域模型

I have created fake Response Domain Model

   public class MyResponse
    {
        public int Id { get; set; }
        public int Col1{ get; set; }
        public int Col2 { get; set; } 
    }

我称它为Fake Domain Model，因为Domain模型通常是CLR中的表表示形式类，但我在SQL Server中没有这样的表。

I called it Fake Domain Model because Domain model is generally table representation in CLR class but I dont have such Table in SQL Server.

然后我在Context类下为此添加了属性，如下所示：

Then I have Added property for this under Context class as below

public class MyQueryDbContext : DbContext
{
  public virtual DbSet<MyResponse> Data { get; set; }
    .
    .
    .
}

然后需要为请求参数列表创建数据表，如下所示

Then Need to create Data Table for Request parameter list, I have added like below

 DataTable table = new DataTable();
 table.Columns.Add("Id", typeof(int));
 table.Columns.Add("Col1", typeof(int));
 table.Columns.Add("Col2", typeof(int));

然后我使用EF从.net核心API调用存储过程，并将数据表作为参数传递，如下所示

Then I have called Stored procedure from .net core API using EF and passed datatable as parameter like below

 var parameter = new SqlParameter("@MyRequest", SqlDbType.Structured);
 parameter.Value = table;
 parameter.TypeName = "[dbo].[MyRequestType]" // My Table valued user defined type
var response=_context.Data
                     .FromSql("EXEC [dbo].[GetMyData] @MyRequest", parameter)
                     .ToList()

您将在自己的响应中得到响应响应变量。

You will get response in you response variable.

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