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How can i create an object from class from user? [duplicate]

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0

This question already has an answer here:

• 
  ArgumentOutOfRangeException on initialized List
  
  1 answer
  
  

I've created a class "Person" and I want to do a while loop to let the user add objects until they want to stop, but it doesn't work.

I think the problem is I don't know how to create new objects from a list, but I'm unsure.

Here's my code:

static void Afficher(List <Personne> maliste)

 foreach (var per in maliste)
 
 per.ToString();
 


static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i] = new Personne();
 maliste[i].nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i].prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i].age = int.Parse(s);

 i++;
 

Error happens on maliste[i] = new Personne(); line:

ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.

c#

share|improve this question

edited Mar 9 at 2:46

Alexei Levenkov

85.6k893140

asked Mar 8 at 23:40

Reda TahaReda Taha

147

marked as duplicate by Alexei Levenkov c#
Users with the  c# badge can single-handedly close c# questions as duplicates and reopen them as needed.

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Mar 9 at 2:44

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Somewhere based on something you will want to set stop to true to break out of the loop. You will also want to be much, much clearer about it doesn't work
  
  – Make StackOverflow Good Again
  Mar 8 at 23:47
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @MakeStackOverflowGoodAgain no, they have break in several mis-formatted if checks - so all good (while(true) would be better, but...)
  
  – Alexei Levenkov
  Mar 9 at 2:45
  

  
  
  
  

add a comment | 

0

This question already has an answer here:

• 
  ArgumentOutOfRangeException on initialized List
  
  1 answer
  
  

I've created a class "Person" and I want to do a while loop to let the user add objects until they want to stop, but it doesn't work.

I think the problem is I don't know how to create new objects from a list, but I'm unsure.

Here's my code:

static void Afficher(List <Personne> maliste)

 foreach (var per in maliste)
 
 per.ToString();
 


static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i] = new Personne();
 maliste[i].nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i].prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i].age = int.Parse(s);

 i++;
 

Error happens on maliste[i] = new Personne(); line:

ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.

c#

share|improve this question

edited Mar 9 at 2:46

Alexei Levenkov

85.6k893140

asked Mar 8 at 23:40

Reda TahaReda Taha

147

marked as duplicate by Alexei Levenkov c#
Users with the  c# badge can single-handedly close c# questions as duplicates and reopen them as needed.

StackExchange.ready(function()
if (StackExchange.options.isMobile) return;

$('.dupe-hammer-message-hover:not(.hover-bound)').each(function()
var $hover = $(this).addClass('hover-bound'),
$msg = $hover.siblings('.dupe-hammer-message');

$hover.hover(
function()
$hover.showInfoMessage('',
messageElement: $msg.clone().show(),
transient: false,
position: my: 'bottom left', at: 'top center', offsetTop: -7 ,
dismissable: false,
relativeToBody: true
);
,
function()
StackExchange.helpers.removeMessages();

);
);
);
Mar 9 at 2:44

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Somewhere based on something you will want to set stop to true to break out of the loop. You will also want to be much, much clearer about it doesn't work
  
  – Make StackOverflow Good Again
  Mar 8 at 23:47
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @MakeStackOverflowGoodAgain no, they have break in several mis-formatted if checks - so all good (while(true) would be better, but...)
  
  – Alexei Levenkov
  Mar 9 at 2:45
  

  
  
  
  

add a comment | 

This question already has an answer here:

• 
  ArgumentOutOfRangeException on initialized List
  
  1 answer
  
  

I've created a class "Person" and I want to do a while loop to let the user add objects until they want to stop, but it doesn't work.

I think the problem is I don't know how to create new objects from a list, but I'm unsure.

Here's my code:

static void Afficher(List <Personne> maliste)

 foreach (var per in maliste)
 
 per.ToString();
 


static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i] = new Personne();
 maliste[i].nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i].prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i].age = int.Parse(s);

 i++;
 

Error happens on maliste[i] = new Personne(); line:

ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.

c#

share|improve this question

edited Mar 9 at 2:46

Alexei Levenkov

85.6k893140

asked Mar 8 at 23:40

Reda TahaReda Taha

147

static void Afficher(List <Personne> maliste)

 foreach (var per in maliste)
 
 per.ToString();
 


static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i] = new Personne();
 maliste[i].nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i].prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 maliste[i].age = int.Parse(s);

 i++;
 

share|improve this question

edited Mar 9 at 2:46

Alexei Levenkov

85.6k893140

asked Mar 8 at 23:40

Reda TahaReda Taha

147

share|improve this question

edited Mar 9 at 2:46

Alexei Levenkov

85.6k893140

asked Mar 8 at 23:40

Reda TahaReda Taha

147

edited Mar 9 at 2:46

Alexei Levenkov

85.6k893140

edited Mar 9 at 2:46

Alexei Levenkov

85.6k893140

asked Mar 8 at 23:40

Reda TahaReda Taha

147

asked Mar 8 at 23:40

Reda TahaReda Taha

147

1 Answer
1

active

oldest

votes

3

You can't use the array indexing (like maliste[i]) when adding a new item. All you need to do is call maliste.Add to insert a new item in the list. Your function should look like this:

static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 var pers = new Personne();
 maliste.Add( pers );
 pers.nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.age = int.Parse(s);

 i++;
 

share|improve this answer

answered Mar 8 at 23:49

Darrin CullopDarrin Cullop

80469

add a comment | 

3

You can't use the array indexing (like maliste[i]) when adding a new item. All you need to do is call maliste.Add to insert a new item in the list. Your function should look like this:

static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 var pers = new Personne();
 maliste.Add( pers );
 pers.nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.age = int.Parse(s);

 i++;
 

share|improve this answer

answered Mar 8 at 23:49

Darrin CullopDarrin Cullop

80469

add a comment | 

3

You can't use the array indexing (like maliste[i]) when adding a new item. All you need to do is call maliste.Add to insert a new item in the list. Your function should look like this:

static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 var pers = new Personne();
 maliste.Add( pers );
 pers.nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.age = int.Parse(s);

 i++;
 

share|improve this answer

answered Mar 8 at 23:49

Darrin CullopDarrin Cullop

80469

add a comment | 

You can't use the array indexing (like maliste[i]) when adding a new item. All you need to do is call maliste.Add to insert a new item in the list. Your function should look like this:

static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 var pers = new Personne();
 maliste.Add( pers );
 pers.nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.age = int.Parse(s);

 i++;
 

share|improve this answer

answered Mar 8 at 23:49

Darrin CullopDarrin Cullop

80469

static void Ajouter(List<Personne> maliste)

 string s;
 bool stop = false;
 int i = 0;
 while(!stop)
 
 Console.WriteLine("Entrez les informations ou entrez pour terminez!!");
 Console.WriteLine("Entrez le nom de la personne numero "+ (i+1));
 s = Console.ReadLine();
 if (s == "") break;
 var pers = new Personne();
 maliste.Add( pers );
 pers.nom = s;
 Console.WriteLine("Entrez le prenom de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.prenom = s;
 Console.WriteLine("Entrez l'age de la personne numero " + (i + 1));
 s = Console.ReadLine();
 if (s == "") break;
 pers.age = int.Parse(s);

 i++;
 

share|improve this answer

answered Mar 8 at 23:49

Darrin CullopDarrin Cullop

80469

answered Mar 8 at 23:49

Darrin CullopDarrin Cullop

80469

answered Mar 8 at 23:49

Darrin CullopDarrin Cullop

80469