Experimental requirements
1. To achieve a student information management system, including information: School number, name, sex, date of birth, professional, notes and other information.
2. Require that the appropriate data type or custom type be selected for each field in the student information;
3. The design system requires an object-oriented approach to abstract and encapsulate the classes you have analyzed;
4. Define the appropriate access access permissions for each class member that you abstract
5. Define the appropriate public interfaces (attributes and indexers) for each class you abstract.
6. Requirements can be implemented in the system of Student information: Add, delete, modify and query function;
7. Require student information to be saved to a specified text file, which supports the ability to read and write files.
Using System;
Using System.Collections;
Using System.IO;
Namespace SEI. DL88250. Sourcecodes.csharp
{
public interface Istudent
{
Properties
String ID
{
get;
Set;
}
String Name
{
get;
Set;
}
String Gender
{
get;
Set;
}
String Classnum
{
get;
Set;
}
String Specialty
{
get;
Set;
}
String BDay
{
get;
Set;
}
}
public interface Istudentimp
{
Methods
ADD a new student ' s info into ArrayList
void Addinfo ();
Print out all Students ' info to console
void DisplayInfo ();
Delete A student ' s info
void Dropinfo ();
Save all students ' info into disk
void SaveFile ();
Search A student ' s info by ID
If Find info Return the student ' s ID hash code,
otherwise return reserved ID (20051120000) hash code
int SearchInfo (string ID);
}
Class Student
{
Fields
private string _id;
private string _name;
private string _gender;
private string _classnum;
private string _specialty;
Private System.DateTime _bday;
Properties
public string ID
{
Get
{
return _id;
}
Set
{
_id = value;
}
}
public string Name
{
Get
{
return _name;
}
Set
{
_name = value;
}
}
public string Gender
{
Get
{
return _gender;
}
Set
{
_gender = value;
}
}
public string Classnum
{
Get
{
return _classnum;
}
Set
{
_classnum = value;
}
}
public string Specialty
{
Get
{
return _specialty;
}
Set
{
_specialty = value. ToString ();
}
}
public string BDay
{
Get
{
Return _bday. ToShortDateString ();
}
Set
{
_bday = System.DateTime.Parse (value);
}
}
Constructors
Public Student (string ID, string name, String gender,
String Classnum, String specialty, String bday)
{
_id = ID;
_name = name;
_gender = gender;
_classnum = Classnum;
_specialty = specialty;
_bday = System.DateTime.Parse (bday);
}
}
Class Studentimp:istudentimp
{
Fileds
private static string [] _mainmenu; Function description
private static string [] _addinfo; Add info prompt
private static string [] _saveinfo; Save File prompt
private static string [] _modifyinfo; Modify Menu Prompt
private static string [] _helpinfo; Help infomation
Private Hashtable _stdinfo; Store Student Info
Consturctors
Studentimp ()
{
Initial some prompt info
_mainmenu = new String []{
"1. Add",
"2. Modify",
"3. Drop",
"4 Save file",
"5 Display Info",
"6. Help",
"7. Exit"
};
_helpinfo = new String []{
"1. ID must unique.",
"2. Modify function can ' t change id. if you want to change the ID, please drop this record and new one again.
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