本文实例讲述了C#实现在购物车系统中生成不重复订单号的方法。分享给大家供大家参考。具体分析如下：

订单号在购物过程中起到了很好的识别作用，更方便的有利于工作人员识别商品，代码如下：

#region 生成单据号/// <summary>/// 生成单据号/// </summary>/// <param name="pFromType"></param>/// <returns></returns>public static string GetFormCode(FormType pFromType){ string formcode = ""; switch(pFromType) { case FormType.CaiGou: { formcode = "CG"; break; } case FormType.ChaiXie: { formcode = "CX"; break; } case FormType.ChuKu: { formcode = "CK"; break; } case FormType.LingLiao: { formcode = "LL"; break; } case FormType.PeiChang: { formcode = "PC"; break; } case FormType.RuKu: { formcode = "RK"; break; } case FormType.ShengChan: { formcode = "SC"; break; } case FormType.SunYi: { formcode = "SY"; break; } case FormType.TuiHuo: { formcode = "TH"; break; } case FormType.XiaoShou: { formcode = "XS"; break; } case FormType.PeiSong: { formcode = "PS"; break; } case FormType.ZengPin: { formcode = "ZP"; break; } case FormType.FuKuan: { formcode = "FK"; break; } case FormType.ShouKuan: { formcode = "SK"; break; } } formcode += DateTime.Now.Year.ToString(); formcode += DateTime.Now.Month.ToString().Length == 1?"0" + DateTime.Now.Month.ToString() : DateTime.Now.Month.ToString(); formcode += DateTime.Now.Day.ToString().Length == 1?"0" + DateTime.Now.Day.ToString() : DateTime.Now.Day.ToString(); formcode += DateTime.Now.Hour.ToString().Length == 1?"0" + DateTime.Now.Hour.ToString() : DateTime.Now.Hour.ToString(); formcode += DateTime.Now.Minute.ToString().Length == 1?"0" + DateTime.Now.Minute.ToString() : DateTime.Now.Minute.ToString(); formcode += DateTime.Now.Second.ToString().Length == 1?"0" + DateTime.Now.Second.ToString() : DateTime.Now.Second.ToString(); if(DateTime.Now.Millisecond.ToString().Length == 1) { formcode += "00" + DateTime.Now.Millisecond.ToString(); } else if (DateTime.Now.Millisecond.ToString().Length == 2) { formcode += "0" + DateTime.Now.Millisecond.ToString(); } else { formcode += DateTime.Now.Millisecond.ToString(); } return formcode;}#endregion

希望本文所述对大家的C#程序设计有所帮助。