[Year 12 SofDev] C# - Adding data to an Array from user input

Hem, Lony L hem.lony.l at edumail.vic.gov.au
Tue Feb 7 09:37:15 AEDT 2017 

Hi Darren

I haven’t used this very often in c# but something equivalent would be

Array.Resize<T>(ref T myarray, int size)

Eg

Array.Resize<cars>(ref myArray, 20) // set size of array to 20

Alternatively I would use

var  myCars = new List<cars>();
myCars.Add(new cars());
myCars.Last<cars>().id = “jkhj”;

var myarray = myCars.ToArray<cars>(); //if need array

Regards Lony

From: sofdev-bounces at edulists.com.au [mailto:sofdev-bounces at edulists.com.au] On Behalf Of Darren Scott
Sent: Tuesday, 7 February 2017 8:33 AM
To: Year 12 Software Development Teachers' Mailing List <sofdev at edulists.com.au>
Subject: Re: [Year 12 SofDev] C# - Adding data to an Array from user input

VB has a Redim command … does C# ?

Something like this?

ReDim Preserve thesecars(0 To thiscar)          ' keep the data, add one to the array of cars
        thesecars(thiscar) = New cars                   ' make a new car
        With thesecars(thiscar)                         ' get info from screen into thiscar
            .id = Val(lblID.Text)
            .make = txtMake.Text
            .model = txtModel.Text
        End With

It’s probably not the cleanest solution …

Darren


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Darren Scott
Teacher
Catholic College Bendigo

'Opening the Doors of Mercy'

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From: sofdev-bounces at edulists.com.au<mailto:sofdev-bounces at edulists.com.au> [mailto:sofdev-bounces at edulists.com.au] On Behalf Of Cooper, Michael J
Sent: Monday, February 6, 2017 4:35 PM
To: Year 12 Software Development Teachers' Mailing List <sofdev at edulists.com.au<mailto:sofdev at edulists.com.au>>
Subject: Re: [Year 12 SofDev] C# - Adding data to an Array from user input

Thanks Ben the list methods seem like a much cleaner way to do it

Michael Cooper
ICT Co-ordinator & Network Support

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braybrooksc.vic.edu.au<http://www.Braybrooksc.vic.edu.au>
Ph. 9312 2900


From: <sofdev-bounces at edulists.com.au<mailto:sofdev-bounces at edulists.com.au>> on behalf of Ben Hines <b.hines at ccg.vic.edu.au<mailto:b.hines at ccg.vic.edu.au>>
Reply-To: Year 12 Software Development Teachers' Mailing List <sofdev at edulists.com.au<mailto:sofdev at edulists.com.au>>
Date: Monday, 6 February 2017 at 2:46 pm
To: Year 12 Software Development Teachers' Mailing List <sofdev at edulists.com.au<mailto:sofdev at edulists.com.au>>
Subject: Re: [Year 12 SofDev] C# - Adding data to an Array from user input

Um,

The problem with arrays is that they are made with a fixed size.

You can easily have a textbox (or NumericInput) control, then a button that adds to the array. You will need to have a counter variable that keeps track of where you are in the array.

Or you could just use a List<T> which has methods for adding and removing from the list (List is just an array with lots of helpful functions that make it easier to use).

Hope that helps!

Regards,

Ben Hines


Ben Hines
Mathematics and ICT Teacher
Senior School - Waurn Ponds
(03)5241 1577

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From: sofdev-bounces at edulists.com.au<mailto:sofdev-bounces at edulists.com.au> [mailto:sofdev-bounces at edulists.com.au] On Behalf Of Cooper, Michael J
Sent: Monday, 6 February 2017 12:58 PM
To: Year 12 Software Development Teachers' Mailing List <sofdev at edulists.com.au<mailto:sofdev at edulists.com.au>>
Subject: [Year 12 SofDev] C# - Adding data to an Array from user input

Hello fellow SD teachers,

C# coding question - what is the best way to allow a USER to enter data into an array using a GUI, not the console?

I’ve used InputBoxes and loops with Visual Basic, however InputBoxes don’t seem to be thing in C#, without adding the Microsoft.VisualBasic namepace.

I can add data to an array during design time easily enough, but I want the USER to be able to click on a button and be prompted to enter data, which then populates the array.

Or am I going about this the wrong way entirely and should be using another technique?

Michael Cooper
ICT Co-ordinator & Network Support

[cid:image009.png at 01D28124.D075EA00]
braybrooksc.vic.edu.au<http://www.Braybrooksc.vic.edu.au>
Ph. 9312 2900


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