A DVD manager written in C# for your reference. The specific content is as follows
(Don't criticize me, beginners mainly use reference)
It is divided into three categories: DVD (start class), XinXi (information class), and GongNeng (function class)
The code part (as follows):
DVD (start class):
class DVD
{
static void Main(string[] args)
{
GongNeng gongNeng = new GongNeng();
(); //initialization (); //Travel the initialization information (); //Options menu }
}
XinXi (information class):
class XinXi
{
private string _name;//name private int state;//Lend status private string date;//time
//Attribute encapsulation public string Name { get => _name; set => _name = value; }//name public int State { get => state; set => state = value; }//Lend status public string Date { get => date; set => date = value; }//time }
GongNeng (functional class):
Because the function class uses regular expressions to judge the date format, the header needs to be added:
using ; // RegularExpressions is a regular expression, Text is text
class GongNeng
{
XinXi[] xinxi = new XinXi[10];//Object array stores data //Initialization information #region Initialization Information public void initial() {
xinxi[0] = new XinXi();
xinxi[0].Name = "Roman Holiday";
xinxi[0].State = 0;
xinxi[0].Date = "2010-7-1";
xinxi[1] = new XinXi();
xinxi[1].Name = "The wind and the cranes";
xinxi[1].State = 1;
xinxi[1].Date = "";
xinxi[2] = new XinXi();
xinxi[2].Name = "Full House";
xinxi[2].State = 1;
xinxi[2].Date = "";
}
#endregion
//Show initialization information #region Display initialization information public void XianShi() {
("****** Initialization information is as follows: **********");
foreach (XinXi item in xinxi) {
if (item != null) {
(+"\t"++"\t"+);
}
}
("********************************");
}
#endregion
//DVD menu #region DVD Menu public void CaiDan()
{
("------------------------------------------------------------------------------------------------------------------------------);
("1. Add DVD\n2. View DVD\n3. Delete DVD\n4. Lend DVD\n5. Return DVD\n6. Exit");
("-------------------------------------------------");
("Please enter your selection:");
int xuanZe = (());
switch (xuanZe)
{
case 1:
//Added DVD XinZeng();
break;
case 2:
//View DVD ChaXun();
break;
case 3:
//Delete DVD ShanChu();
break;
case 4:
//Lend DVD JieChu();
break;
case 5:
//Return DVD GuiHuan();
break;
case 6:
//quit ("Welcome next time!");
break;
default:
//No option ("Sorry, there is no option!");
break;
}
}
#endregion
//Enter 0 and return #region Enter 0, return public void FanHui() {
do {
("Enter 0, return:");
string Ling = ();
if (("0")) {
CaiDan();
}
} while (true);
}
#endregion
//Added DVD #region Added DVD public void XinZeng() {
bool flag = true;
("Added new DVD here----->");
("Please enter the DVD name:");
string dvdName = ();
for (int i=0; i< ; i++) {
if (xinxi[i] == null) {
flag = false;
xinxi[i] = new XinXi();
xinxi[i].Name = dvdName;
xinxi[i].State = 1;
xinxi[i].Date = "";
("Name is{0}ofDVDAdded successfully！", xinxi[i].Name);
break;
}
}
if (flag) {
("Sorry, the storage space is full");
}
FanHui();//return }
#endregion
//Query DVD #region query DVD public void ChaXun() {
("Implement query DVD here----->");
("{0,-8}{1,-10}{2,-8}", "name","state","time");
string zhuangTai = ;
foreach (XinXi item in xinxi)
{
if (item != null)
{
if ( == 0) {
zhuangTai = "By Lending";
} else if ( == 1) {
zhuangTai = "Not Lending";
}
("{0,-8}{1,-10}{2,-8}",, zhuangTai, );
}
}
FanHui();//return }
#endregion
//Judge the corresponding subscript #region judges the corresponding subscript public XinXi Duan(string dvdName) {
foreach (XinXi item in xinxi) {
if (item != null && (dvdName)) {
return item;
}
}
return null;
}
#endregion
//Delete DVD #region Delete DVD public void ShanChu() {
("Implementation of delete DVD here----->");
("Please enter the DVD name:");
string dvdName = ();
XinXi renWu = Duan(dvdName);
if (renWu == null) {
("Sorry, there is no DVD");
return;
}
for (int i=0; i< ; i++) {
if (renWu == xinxi[i] && xinxi[i].State == 1) {
for (int j = i; j < -1; j++) {
xinxi[j] = xinxi[j + 1];
}
int nu = - 1;
xinxi[nu] = null;
("Order deleted successfully!");
break;
} else if (renWu == xinxi[i] && xinxi[i].State == 0) {
("Sorry, the order cannot be deleted in the lending status!");
break;
}
}
FanHui();//return }
#endregion
//Lend DVD #region Lend DVD public void JieChu() {
("Implement the lent DVD here----->");
("Please enter the DVD name:");
string dvdName = ();
XinXi renWu = Duan(dvdName);
if (renWu == null)
{
("Sorry, there is no DVD");
FanHui();//return }
if ( == 0) {
("Sorry, the DVD was borrowed first!");
FanHui();//return }
("Please enter the loan date (year-month-day):");
string riQi = ();
bool flag = Money(riQi);
if (!flag)
{
("Sorry, the date you entered is incorrect!");
FanHui();//return }
else {
= 0;
= riQi;
("Lending DVD successfully!");
}
FanHui();//return }
#endregion
//Judge the loan date format #region Determine the lending date format public bool Money(string riQi)
{
string monval = @"^\d{4}-\d{1,2}-\d{1,2}$";
return (riQi, monval);
}
#endregion
//Return DVD #region Return DVD public void GuiHuan() {
("Return DVD here----->");
("Please enter the DVD name:");
string dvdName = ();
XinXi renWu = Duan(dvdName);
if (renWu == null)
{
("Sorry, there is no DVD");
FanHui();//return }
if ( == 1)
{
("Sorry, this DVD has not been loaned yet and cannot be returned!");
FanHui();//return }
("Please enter the return date (year-month-day):");
string riQi = ();
bool flag = Money(riQi);
if (!flag)
{
("Sorry, the date you entered is incorrect!");
FanHui();//return }
else
{
string jieChu = ;
if ((jieChu, riQi) < 0)
{
//Convert string to date format DateTime dat1 = (jieChu);//lend DateTime dat2 = (riQi);//date TimeSpan span = (dat1);
// Find the difference between lending and return int cha = + 1;
= 1;
= "";
("\nreturn《{0}》success!", );
("The loan date is：{0}", dat1);
("return日期为：{0}", dat2);
("Rent payable is：{0}",cha);
}
else {
("Sorry, the return date cannot be less than the loan date!");
FanHui();//return }
}
FanHui();//return }
#endregion
}
The code is displayed!
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