C#实现在购物车系统中生成不重复订单号的方法

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。