I've read, in several different websites, that one can put any object into an ArrayList. Does this include an ArrayList? Is it possible to have an ArrayList of ArrayLists? I've not tried yet to build my solution with it set up this way. I would like to find out from any of you 'experts' first, before I go through a lot of trouble attempting to make it work if it is not supposed to work.

RLELLE

__________________
RLELLE

Yes you can do that something like this will work:

        ArrayList ar = new ArrayList();
        ArrayList ar2 = new ArrayList();
        ar2.Add("foo");
        ar.Add(ar2);

        ArrayList ar3 = (ArrayList)ar[0];
        Response.Write(Convert.ToString(ar3[0]));

foo is wrote to the screen. You could also use a List<T> for this secnario.

hth.


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Thanks for your prompt reply.

Below is what I am attempting. Does it make sense?

public ArrayList alRvwrNm = new ArrayList();
public ArrayList alActCnt = new ArrayList();
public ArrayList alPrfrNm = new ArrayList();
public ArrayList alDdoCd = new ArrayList();
public ArrayList alGridview = new ArrayList();

alGridview.Add(alPrfrNm, alDdoCd, alActCnt, alRvwrNm);

I am collecting data from three different tables. The data I am collecting is to be be sorted, then posted to a gridview. I had it all on a gridview already, but the column that I needed to sort was a template field. I soon discovered that a template field could not be sorted. So, I had to resort to building and combining these arrays, sorting the data, then posting it to the gridview.

RLELLE

Add() only takes one argument. The above code will throw an error telling you as much.

I am curious, why are you using an ArrayList as opposed to an ObjectDataSource or SQL Datasource? This seems like alot of work for something so trivial.

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I am converting an application written in java over to C#. The programmer that wrote the app in java says he gathered all this data into arrays, sorted the data, then presented it on a form. I am trying to mimic that, but honestly, I do wonder if I could gather up all this data into a dataset, do the sorting, then bind to a gridview. The problem is that the data gathering is a two or three step process. So, storing the data into arrays seemed reasonable. Like I said earlier, I had all this working just fine with a gridview except for the fact that it was not sorted. The column to be sorted was a template field, and the gridview did not like me sorting on that.

RLELLE

That doesn't seem to make sense. I declare my SortExpressions in the TemplateField and do not have a problem with this? Are you sure you have set up your sorting correctly? Check out Scott Gu's page, it may shed some light on your problem:

http://weblogs.asp.net/scottgu/archi...11/437995.aspx


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Read this if you want to know how to get a correct reply for your question:
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Wrox Books 24 x 7
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