关于计数以及Index返回订单号升级版可以控制年月日累计（不重复）（sqlite）

1数据库创建：

RAGMA foreign_keys = false;-- ----------------------------
-- Table structure for OrderSIndex
-- ----------------------------
DROP TABLE IF EXISTS "OrderSIndex";
CREATE TABLE "OrderSIndex" ("Id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,"OrderName" nvarchar(40),"OrderIndexInSigle" integer,"IndexType" integer,"CreateDate" datetime,"Updated" datetime,"ThisSigle" nvarchar(20)
);-- ----------------------------
-- Auto increment value for OrderSIndex
-- ----------------------------
UPDATE "sqlite_sequence" SET seq = 4 WHERE name = 'OrderSIndex';PRAGMA foreign_keys = true;

Model数据：

 /// <summary>/// /// </summary>public class OrderSIndex{/// <summary>/// /// </summary> [Description("")]public int Id { get; set; }/// <summary>/// /// </summary> [Description("")]public string OrderName { get; set; }/// <summary>/// /// </summary> [Description("")]public int OrderIndexInSigle { get; set; }/// <summary>/// /// </summary> [Description("")]public int IndexType { get; set; }/// <summary>/// /// </summary> [Description("")]public DateTime CreateDate { get; set; }/// <summary>/// /// </summary> [Description("")]public DateTime Updated { get; set; }/// <summary>/// /// </summary> [Description("")]public string ThisSigle { get; set; }}

DAL操作

 public  class DALOrderSIndex{/// <summary>///获取当前 0月累计，1日累计，2年累计，3，总共累计/// </summary>/// <param name="SetNoType"> 0月累计，1日累计，2年累计，3，总共累计</param>/// <param name="SetKeyword">当前关键字（需要的表单名子）</param>/// <param name="OutIndexLength">index编号长度 0001 就是4 </param>/// <returns></returns>public string OutIndexStr(string SetKeyword, int SetNoType = 0, int OutIndexLength = 5){string ThisSigle;switch (SetNoType){case 0:ThisSigle = $"{DateTime.Now.Year}{DateTime.Now.ToString("MM")}";break;case 1:ThisSigle = DateTime.Now.ToString("yyyyMMdd");break;case 2:ThisSigle = DateTime.Now.Year.ToString();break;default://3ThisSigle = string.Empty;//数据空break;}string OutStr;string sqlQurey = $"select * from OrderSIndex where OrderName = '{SetKeyword}' and ThisSigle = '{ThisSigle}'";string SqlInsert = $"insert into  OrderSIndex (OrderName,OrderIndexInSigle,IndexType,CreateDate,Updated,ThisSigle) values('{SetKeyword}',1,{SetNoType},datetime('now','localtime'),datetime('now','localtime'),'{ThisSigle}')";string SqlUpdate = $"Update OrderSIndex set OrderIndexInSigle=OrderIndexInSigle +1 where OrderName = '{SetKeyword}' and ThisSigle = '{ThisSigle}'  ";using (IDbConnection Conn = new DALDBBase().GetOpenConn()){IEnumerable<OrderSIndex> list = Conn.Query<OrderSIndex>(sqlQurey);if (list == null || list.Count() == 0){Conn.Execute(SqlInsert);OutStr = $"{ThisSigle}{1.ToString().PadLeft(OutIndexLength, '0')}";}else{Conn.Execute(SqlUpdate);OrderSIndex oneModel = list.FirstOrDefault();OutStr = $"{ThisSigle}{(oneModel.OrderIndexInSigle + 1).ToString().PadLeft(OutIndexLength, '0')}";}}return OutStr; }}

使用方法：

 string  innn =  new DAL.DALOrderSIndex().OutIndexStr("功能表数据",3,2);