EF中執行儲存過程,獲取output返回值
阿新 • • 發佈:2019-01-10
<span style="color: rgb(75, 75, 75); font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.8px;">EF不能直接支援執行儲存過程,於是使用轉化成執行SQL語句的形式,卻怎麼也獲取不到output的值,折騰的好久,終於解決了,分享下曲折的經歷:</span>
儲存過程測試例項:public int AddVote(int titleId, int blockId, int typeId) { List<SqlParameter> paramArray = new List<SqlParameter>(); paramArray.Add(new SqlParameter("@titleId", titleId)); paramArray.Add(new SqlParameter("@blockId", blockId)); paramArray.Add(new SqlParameter("@typeId", typeId)); SqlParameter param = new SqlParameter("@num", SqlDbType.Int); param.Direction = ParameterDirection.Output; paramArray.Add(param); using (RPDBContext db = new RPDBContext()) { try { db.Database.ExecuteSqlCommand("EXEC [AddVote] @blockId,@titleId,@typeId,@num out", paramArray.ToArray()); } catch (Exception ex) { throw; } int result = (int)paramArray[3].Value; return result; } }
USE [HY_ReplyComment] GO /****** 物件: StoredProcedure [dbo].[AddVote] 指令碼日期: 06/10/2014 22:27:11 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: <Author,,Name> -- Create date: <Create Date,,> -- Description: <Description,,> -- ============================================= CREATE PROCEDURE [dbo].[AddVote] @blockId int, @titleId int, @typeId int, @num int output AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON; SELECT @num = Count(1) FROM [Vote] WHERE TitleId = @titleId AND BlockId = @blockId END