Build dynamic list c#

Question

This code works correctly to make a web service call:

int numberOfGuests = Convert.ToInt32(search.Guest);
var list = new List<Guest>();
Guest adult = new Guest();
adult.Id = 1;
adult.Title = "Mr";
adult.Firstname = "Test";
adult.Surname = "Test";
list.Add(adult);
Guest adult2 = new Guest();
adult2.Id = 2;
adult2.Title = "Mr";
adult2.Firstname = "Test";
adult2.Surname = "Test";
list.Add(adult2);

Guest[] adults = list.ToArray();

How do I build the list dynamically using the numberofguests variable to create the list? The output has to match the output shown exactly else the web service call fails, so adult.id = 1, adult2.id = 2, adult3.id = 3, etc...

Isn't this pretty much the same question as this? http://stackoverflow.com/questions/735446/dynamically-build-an-array-for-web-service-c. If not, what new info do you need? — dommer, Apr 10 '09 at 10:51

score 4 · Accepted Answer · answered Apr 10 '09 at 10:46

4

Do you know about loops?

for (int i = 1; i <= numberofGuests; i++) {
    var adult = new Guest();
    adult.Id = i;
    adult.Title = "Mr";
    adult.Firstname = "Test";
    adult.Surname = "Test";
    list.Add(adult)
}

This runs the code within the loop once from 1 to numberOfGuests, setting the variable i to the current value.

answered Apr 10 '09 at 10:46

Konrad Rudolph

530,221
131
937
1,214

I think the OP wants to use different data for each loop iteration - for example, Title, FirstName, SurName. – Cerebrus Apr 10 '09 at 10:56

score 2 · Answer 2 · answered Apr 10 '09 at 11:02

2

The Linq way :-)

    var list = (from i in Enumerable.Range(1, numberOfGuests)
        select new Guest 
        {
          Id = i,
          Title = "Mr.",
          Firstname = "Test",
          Surname = "Test"
        }).ToList();

answered Apr 10 '09 at 11:02

Miha Markic

3,158
22
28

score 1 · Answer 3 · answered Apr 10 '09 at 10:47

1

You need a for loop. Or, better yet, a decent C# book -- these are really basics of C#.

answered Apr 10 '09 at 10:47

Anton Gogolev

113,561
39
200
288

Basics for most programming languages. – SirDemon Apr 10 '09 at 10:48
I think the OP wants to use different data for each list member, the fact that the Title etc is the same for each list member is just due to it being a bit of exmaple code. – Ian Ringrose Apr 10 '09 at 11:13

score 0 · Answer 4 · edited May 23 '17 at 12:08

Are you asking how to display a list dynamically? I'm not really sure what the question here is about, as the other answers say if you know the value of numberofGuests then you can just use a loop to go through your list.

I suspect you are wondering how to obtain this information in the first place, am I right? If you want to dynamically add controls to a page (your previous post suggest this was ASP.Net I think?), so that you only display the correct number of controls then take a look at these related questions:

Dynamically adding controls in ASP.NET Repeater

ASP.NET - How to dynamically generate Labels

Build dynamic list c#

4 Answers4

Linked