首先,需要在数据库中创建一个表,以在test数据库创建tableNo表为例:
create table tablesNo ( tableName varchar(30) not null, --表名 num int not null --行数 )
然后在数据库中 --> 可编程性 --> 存储过程 --> 新建存储过程 ,也可以在sql中执行代码如下:
USE [test] --数据库名 GO /****** Object: StoredProcedure [dbo].[usp_Id] Script Date: 2017/2/1 星期三 下午 6:48:47 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO create proc [dbo].[usp_Id] --新建一个存储过程名为usp_Id @tableName nvarchar(50), @id int output as declare @erro int set @erro=0 begin transaction select @id=num+1 from tablesNo where tableName=@tableName set @erro=@erro+@@ERROR update tablesNo set num=num+1 where tableName=@tableName set @erro=@erro+@@ERROR if(@erro=0) begin commit transaction end else
begin rollback transaction
end
其次在.NET中的DAL层创建一个CommonService类,代码如下:
using System.Data;
using System.Data.SqlClient;
public class CommonService { public static int GetId(string tableName) //存储过程ID { int id = 0; string sql = "usp_Id"; SqlParameter par1 = new SqlParameter("@tableName", tableName); par1.Direction = ParameterDirection.Input; SqlParameter par2 = new SqlParameter("@id", SqlDbType.Int); par2.Direction = ParameterDirection.Output; SqlConnection con = null; SqlCommand cmd = null; try { con = SqlHelper.Open(); cmd = new SqlCommand(); cmd.Connection = con; cmd.CommandText = sql; cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add(par1); cmd.Parameters.Add(par2); cmd.ExecuteNonQuery(); id = Convert.ToInt32(cmd.Parameters["@id"].Value); } catch (SqlException ex) { } finally { con.Close(); } return id; } }
应用方法如下:
Id = CommonService.GetId("ClickAccessAmount");