Hi there, so im trying to get something done for my class. Im supposed to implement something where you can enter details of a person, validate them, then store them as a array, and allow you to add more later. What I dont understand is how to store a group of variables (ie. Name, phone number, postcode) in one array and when another record is added, simply add it on, without erasing the contents of the previous record.
I hope ive asked this in the correct place. Was just hoping for a bit of help, as all tutorials oh the internet only seem to cover entering pre-made data into arrays.
Thanks
elliot81
-2
Newbie Poster
Recommended Answers
Jump to Postuse generics...
List<string> personsData = new List<string>(); string personData = "name,phone,number,postcode"; personsData.Add(personData); //use System.IO.File class to store personsData content...
Jump to PostIf you're newbie.. please read in generics, arrays, and files
Generics http://msdn.microsoft.com/en-us/library/512aeb7t(VS.80).aspx
Arrays http://msdn.microsoft.com/en-us/library/aa288453(VS.71).aspx
File
Jump to PostYou should add a new class Person and use a generic list.
Here's an example:
using System; using System.Collections.Generic; using System.Text; namespace ConsoleApplication { class Program { static void Main(string[] args) { [B]List<Person> people = new List<Person>();[/B] string salary, pno, pcode, state, addr, strno, name; Console.WriteLine("enter …
Jump to PostThanks for the tip, but for this we have been told specifically to use arrays rather then lists. Would you mind posting the array equivalent? :)
static void Main(string[] args) { int select = 0; const int MAX_PEOPLE=10; string[][]people = new string[MAX_PEOPLE][]; int count = 0; while …
All 13 Replies
Ramy Mahrous
401
Postaholic
Featured Poster
use generics...
List<string> personsData = new List<string>();
string personData = "name,phone,number,postcode";
personsData.Add(personData);
//use System.IO.File class to store personsData content...
elliot81
-2
Newbie Poster
Sorry, probably should've mentioned im pretty new at c#. Line 1 declares the array as a string. Line 2 assigns the variables to it. What does line 3 do and how would I allow entryof more then 1 record?
Ramy Mahrous
401
Postaholic
Featured Poster
If you're newbie.. please read in generics, arrays, and files
Generics http://msdn.microsoft.com/en-us/library/512aeb7t(VS.80).aspx
Arrays http://msdn.microsoft.com/en-us/library/aa288453(VS.71).aspx
File http://msdn.microsoft.com/en-us/library/system.io.file(VS.80).aspx
elliot81
-2
Newbie Poster
Thanks, ive read through those, paticually the array section many times and still dont understand. Heres a snippet of the code im trying to use at the moment:
using System;
namespace Assignment1
{
class MainClass
{
public static void Main()
{
string salary, pno, pcode, state,addr, strno, name;
Console.WriteLine("enter salary:");
salary = Console.ReadLine();
Console.WriteLine("enter phone number: ");
pno = Console.ReadLine();
Console.WriteLine("enter post code: ");
pcode = Console.ReadLine();
Console.WriteLine("enter state: ");
state = Console.ReadLine();
Console.WriteLine("enter adress: ");
addr = Console.ReadLine();
Console.WriteLine("enter street number: ");
strno = Console.ReadLine();
Console.WriteLine("enter name: ");
name = Console.ReadLine();
string[] ArrayRec = {salary, pno, pcode, state, addr, strno, name};
foreach (string Details in ArrayRec)
{
Console.WriteLine("Details: = " + Details);
}
}
}
}what I dont understand is how I would add a second record onto this. Like add another person to which I could store those details again.
Any ideas?
farooqaaa
48
Enthusiast
You should add a new class Person and use a generic list.
Here's an example:
using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication
{
class Program
{
static void Main(string[] args)
{
[B]List<Person> people = new List<Person>();[/B]
string salary, pno, pcode, state, addr, strno, name;
Console.WriteLine("enter salary:");
salary = Console.ReadLine();
Console.WriteLine("enter phone number: ");
pno = Console.ReadLine();
Console.WriteLine("enter post code: ");
pcode = Console.ReadLine();
Console.WriteLine("enter state: ");
state = Console.ReadLine();
Console.WriteLine("enter adress: ");
addr = Console.ReadLine();
Console.WriteLine("enter street number: ");
strno = Console.ReadLine();
Console.WriteLine("enter name: ");
name = Console.ReadLine();
// You can add as many people as you want
people.Add(new Person(name, salary, pno, pcode, state, addr, strno));
}
}
class Person
{
public string Name, Salary, Pno, PCode, State, Address, StrNo;
public Person(string name, string salary, string pno, string pcode, string state, string address, string strNo)
{
this.Name = name;
this.Salary = salary;
this.Pno = pno;
this.PCode = pcode;
this.State = state;
this.Address = address;
this.StrNo = strNo;
}
}
}Thanks
elliot81
-2
Newbie Poster
Thanks faroqa, that helped immensely, heres my code as of now:
using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication
{
class Program
{
static void Main(string[] args)
{
int select;
while (select != 3)
{
Console.WriteLine("1. Add new");
Console.WriteLine("2. View records");
switch(select)
{
case 1:
List<Person> people = new List<Person>();
string salary, pno, pcode, state, addr, strno, name;
Console.WriteLine("enter salary:");
salary = Console.ReadLine();
Console.WriteLine("enter phone number: ");
pno = Console.ReadLine();
Console.WriteLine("enter post code: ");
pcode = Console.ReadLine();
Console.WriteLine("enter state: ");
state = Console.ReadLine();
Console.WriteLine("enter adress: ");
addr = Console.ReadLine();
Console.WriteLine("enter street number: ");
strno = Console.ReadLine();
Console.WriteLine("enter name: ");
name = Console.ReadLine();
// You can add as many people as you want
people.Add(new Person(name, salary, pno, pcode, state, addr, strno));
break;
case 2:
for (int i = 0; i < List; i++) [B]//<- ERRORS HERE[/B]
Console.WriteLine(List[i]); [B]//<-And here[/B]
break;
case 3:
break;
}
}
}
}
class Person
{
public string Name, Salary, Pno, PCode, State, Address, StrNo;
public Person(string name, string salary, string pno, string pcode, string state, string address, string strNo)
{
this.Name = name;
this.Salary = salary;
this.Pno = pno;
this.PCode = pcode;
this.State = state;
this.Address = address;
this.StrNo = strNo;
}
}
}The two error messages I get are:
'Using the generic type 'System.Collections.Generic.List<T>' requires '1' type arguments'
Any ideas why this would be? I think after this it should be pretty much smoonth sailing
---
Sorry, to clear it up I want the part of the code that errors, to print the contents of the 'people' array.
farooqaaa
48
Enthusiast
Use this code:
for (int i = 0; i < people.Count; i++)
Console.WriteLine(people[i]);Thanks
elliot81
-2
Newbie Poster
Hi there, heres my coding as of now:
using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication
{
class Program
{
static void Main(string[] args)
{
int select = 0;
List<Person> people = new List<Person>();
while (select != 3)
{
Console.WriteLine("1. Add new");
Console.WriteLine("2. View records");
select = int.Parse(Console.ReadLine());
switch(select)
{
case 1:
string salary, pno, pcode, state, addr, strno, name;
Console.WriteLine("enter salary:");
salary = Console.ReadLine();
Console.WriteLine("enter phone number: ");
pno = Console.ReadLine();
Console.WriteLine("enter post code: ");
pcode = Console.ReadLine();
Console.WriteLine("enter state: ");
state = Console.ReadLine();
Console.WriteLine("enter adress: ");
addr = Console.ReadLine();
Console.WriteLine("enter street number: ");
strno = Console.ReadLine();
Console.WriteLine("enter name: ");
name = Console.ReadLine();
// You can add as many people as you want
people.Add(new Person(name, salary, pno, pcode, state, addr, strno));
break;
case 2:
for (int i = 0; i < people.Count; i++)
Console.WriteLine(people[i]);
break;
case 3:
break;
}
}
}
}
class Person
{
public string Name, Salary, Pno, PCode, State, Address, StrNo;
public Person(string name, string salary, string pno, string pcode, string state, string address, string strNo)
{
this.Name = name;
this.Salary = salary;
this.Pno = pno;
this.PCode = pcode;
this.State = state;
this.Address = address;
this.StrNo = strNo;
}
}
}The program runs fine but when after I enter a record and request to display it, for each record it only displays 'ConsoleApplication.Person'
:/ ideas? thanks again
kvprajapati
1,826
Posting Genius
Team Colleague
>The program runs fine but when after I enter a record and request to display it, for each record it only displays 'ConsoleApplication.Person'
for (int i = 0; i < people.Count; i++)
Console.WriteLine(people[i].Name + " " + people[i].Salary);
elliot81
-2
Newbie Poster
using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication
{
class Program
{
static void Main(string[] args)
{
int select = 0;
//List<Person> people = new List<Person>();
string[] people = new string[50];
while (select != 3)
{
Console.WriteLine("1. Add new");
Console.WriteLine("2. View records");
select = int.Parse(Console.ReadLine());
switch(select)
{
case 1:
string salary, pno, pcode, state, addr, strno, name;
Console.WriteLine("enter salary:");
salary = Console.ReadLine();
Console.WriteLine("enter phone number: ");
pno = Console.ReadLine();
Console.WriteLine("enter post code: ");
pcode = Console.ReadLine();
Console.WriteLine("enter state: ");
state = Console.ReadLine();
Console.WriteLine("enter adress: ");
addr = Console.ReadLine();
Console.WriteLine("enter street number: ");
strno = Console.ReadLine();
Console.WriteLine("enter name: ");
name = Console.ReadLine();
// You can add as many people as you want
new Person(name, salary, pno, pcode, state, addr, strno);
break;
case 2:
for (int i = 0; i < people.Length; i++)
Console.WriteLine(people[i].Name + " " + people[i].Salary);
break;
case 3:
break;
}
}
}
}
class Person
{
public string Name, Salary, Pno, PCode, State, Address, StrNo;
public Person(string name, string salary, string pno, string pcode, string state, string address, string strNo)
{
this.Name = name;
this.Salary = salary;
this.Pno = pno;
this.PCode = pcode;
this.State = state;
this.Address = address;
this.StrNo = strNo;
}
}
}---
Sorry, I didnt see you had reposted. I converted all the code you supplied me with to arrays rather then lists, as that is what we are supposed to be using.
Now it errors as:
'string' does not contain a definition for 'Name' and no extension method 'Name' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)
'string' does not contain a definition for 'Salary' and no extension method 'Salary' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)
kvprajapati
commented:
Purchase some good books and learn c#!!!
-2
kvprajapati
1,826
Posting Genius
Team Colleague
Tip: Don't use an array. It is rare, in reality, you want to use an array. Definitely use a List<T> any time you want to add/delete elements, since resizing arrays is expensive.
static void Main(string[] args)
{
int select = 0;
List<string[]> people = new List<string[]>();
while (select != 3)
{
Console.WriteLine("1. Add new");
Console.WriteLine("2. View records");
select = int.Parse(Console.ReadLine());
switch (select)
{
case 1:
string salary, pno, pcode, state, addr, strno, name;
Console.WriteLine("enter salary:");
salary = Console.ReadLine();
Console.WriteLine("enter phone number: ");
pno = Console.ReadLine();
Console.WriteLine("enter post code: ");
pcode = Console.ReadLine();
Console.WriteLine("enter state: ");
state = Console.ReadLine();
Console.WriteLine("enter adress: ");
addr = Console.ReadLine();
Console.WriteLine("enter street number: ");
strno = Console.ReadLine();
Console.WriteLine("enter name: ");
name = Console.ReadLine();
// You can add as many people as you want
people.Add(new string[] { name, salary, pno, pcode, state, addr, strno });
break;
case 2:
for (int i = 0; i < people.Count; i++)
{
Console.WriteLine(people[i][0] + " " + people[i][1]);
}
break;
case 3:
break;
}
}
}
elliot81
-2
Newbie Poster
Tip: Don't use an array. It is rare, in reality, you want to use an array. Definitely use a List<T> any time you want to add/delete elements, since resizing arrays is expensive.
static void Main(string[] args) { int select = 0; List<string[]> people = new List<string[]>(); while (select != 3) { Console.WriteLine("1. Add new"); Console.WriteLine("2. View records"); select = int.Parse(Console.ReadLine()); switch (select) { case 1: string salary, pno, pcode, state, addr, strno, name; Console.WriteLine("enter salary:"); salary = Console.ReadLine(); Console.WriteLine("enter phone number: "); pno = Console.ReadLine(); Console.WriteLine("enter post code: "); pcode = Console.ReadLine(); Console.WriteLine("enter state: "); state = Console.ReadLine(); Console.WriteLine("enter adress: "); addr = Console.ReadLine(); Console.WriteLine("enter street number: "); strno = Console.ReadLine(); Console.WriteLine("enter name: "); name = Console.ReadLine(); // You can add as many people as you want people.Add(new string[] { name, salary, pno, pcode, state, addr, strno }); break; case 2: for (int i = 0; i < people.Count; i++) { Console.WriteLine(people[i][0] + " " + people[i][1]); } break; case 3: break; } } }
Thanks for the tip, but for this we have been told specifically to use arrays rather then lists. Would you mind posting the array equivalent? :)
kvprajapati
1,826
Posting Genius
Team Colleague
Thanks for the tip, but for this we have been told specifically to use arrays rather then lists. Would you mind posting the array equivalent? :)
static void Main(string[] args)
{
int select = 0;
const int MAX_PEOPLE=10;
string[][]people = new string[MAX_PEOPLE][];
int count = 0;
while (select != 3)
{
Console.WriteLine("1. Add new");
Console.WriteLine("2. View records");
select = int.Parse(Console.ReadLine());
switch (select)
{
case 1:
if (count >= MAX_PEOPLE)
{
Console.WriteLine("No room for more peoples....");
break;
}
string salary, pno, pcode, state, addr, strno, name;
Console.WriteLine("enter salary:");
salary = Console.ReadLine();
Console.WriteLine("enter phone number: ");
pno = Console.ReadLine();
Console.WriteLine("enter post code: ");
pcode = Console.ReadLine();
Console.WriteLine("enter state: ");
state = Console.ReadLine();
Console.WriteLine("enter adress: ");
addr = Console.ReadLine();
Console.WriteLine("enter street number: ");
strno = Console.ReadLine();
Console.WriteLine("enter name: ");
name = Console.ReadLine();
// You can add as many people as you want
people[count++]=new string[] { name, salary, pno, pcode, state, addr, strno };
break;
case 2:
for (int i = 0; i <count; i++)
{
Console.WriteLine(people[i][0] + " " + people[i][1]);
}
break;
case 3:
break;
}
}
}
Ramy Mahrous
commented:
Patient :)
+6
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