extracting from an ArrayList

[norulzs]

Hi,
In a attempt to create a dynamic multi diminsion array i am using a ArrayList object as i do not know how many dimension i will need during runtime. My code is

ArrayList mySubArray = new ArrayList();
ArrayList myArray = new ArrayList();

//while loop which can have any amount of iterations

mySubArray.Add(sName);
mySubArray.Add(sTitle);
mySubArray.Add(sAddress);

myArray.Add(mySubArray.Clone());

mySubArray.Clear();

Loop

QUESTION
how do i extract the nodes from my subArray object that is within the myArray ArrayList.

Thanks.

[r035198x]

Hi,
In a attempt to create a dynamic multi diminsion array i am using a ArrayList object as i do not know how many dimension i will need during runtime. My code is

ArrayList mySubArray = new ArrayList();
ArrayList myArray = new ArrayList();

//while loop which can have any amount of iterations

mySubArray.Add(sName);
mySubArray.Add(sTitle);
mySubArray.Add(sAddress);

myArray.Add(mySubArray.Clone());

mySubArray.Clear();

Loop

QUESTION
how do i extract the nodes from my subArray object that is within the myArray ArrayList.

Thanks.

Just do myArray[i] . That will return an ArrayList. You then call list[i] on the returned ArrayList to get the "nodes".

However, that design is very bad and cumbersome. Better have a Details class that has sName, title, adddress e.t.c as properties.
You'll then need only one ArrayList of type ArrayList<Details>.
Object oriented design really makes the programming much easier.

[norulzs]

Just do myArray[i] . That will return an ArrayList. You then call list[i] on the returned ArrayList to get the "nodes".

However, that design is very bad and cumbersome. Better have a Details class that has sName, title, adddress e.t.c as properties.
You'll then need only one ArrayList of type ArrayList<Details>.
Object oriented design really makes the programming much easier.

Is this what you mean:

public class MemberDetails
{
public string sName = null;
public string sTitle = null;
public string sAddress = null;

public MemberDetails()
{
}

public MemberDetails( string Name,
string Title,
string Address,)
{
this.sName = Name;
this.sTitle = Title;
this.sAddress = sDoc;
}
}


//loop
myArray.Add(new MemberDetails(sName, sTitle, sAddress));
//loop end

//get back nodes
foreach (MemberDetails member in myArray)
{
string memberName = member.sName;
string memberTitle = member.sTitle;
string memberAddress = member.sAddress
}

Thanks for making it clear

[r035198x]

Yep, you've got it.

[Plater]

If you are talking a large amount of data that you might want to do "work" on, you might consider using a DataTable.
Give yourself a "column" for each value you want to track, then make a new "row" for each entry.

[norulzs]

If you are talking a large amount of data that you might want to do "work" on, you might consider using a DataTable.
Give yourself a "column" for each value you want to track, then make a new "row" for each entry.

So what are the major issues/drawbacks for using my current way if lets says i had 2000 rows to process?

[Plater]

I am not sure if there is much difference in "resource" usage.
Just a difference in how you access the data.

Also, I am not positive on this, but I *think* there is a way you can do SQL queries against a dataset. (Like finding everyone who's name starts with a "P" or something)

[norulzs]

OK cool, thanks for your advice/help

[r035198x]

So what are the major issues/drawbacks for using my current way if lets says i had 2000 rows to process?

You'd need to be calling ArrayList.TrimToSize otherwise you'd be wasting space because arraylist's capacity is always >= arraylist's count.
The most memory efficient approach would probably be to use a struct.
However, all this depends (as Plater said) on what you want to do with the data.

[norulzs]

I'm just passing the data into a stored procedure one by one, so I don't need to run any queries on the dataset before hand, but i think your right it would be better to use a struct instead.