SQL 存储过程

1.创建存储过程一列字符串合并成一个字符串

CREATE PROCEDURE GetTagInfo

    @ObjectId int

AS BEGIN   

  DECLARE @STR  nvarchar(MAX)   

  SELECT @STR=ISNULL(@STR+',','')+Name  FROM [dbo].[TagInfoes] where Id in (select TagId from [dbo].[ObjectTags]  where  ObjectId=@ObjectId)    

  SELECT @STR as TagList

END GO

--查询

execute GetTagInfo '2'

调用：

#region 获取关键字字符串
SqlParameter[] parameters =
{
          new SqlParameter{ ParameterName = "ObjectId",Value=sc.Id} 
};
 List<TagListModel> tagInfo = appDBContext.Database.SqlQuery<TagListModel>("EXEC GetTagInfo @ObjectId", parameters).ToList();
#endregion

类型：

 public class TagListModel 
 {
       public string TagList { get; set; }
  }