Getting an element from an ArrayList

osal · 08-02-2005, 02:31 PM

Lets say I wanted to get each element from an ArrayList, how could that be done.

Im trying to use a for loop, but I cannot figure out how to get the element out of the ArrayList.

GanglyLamb · 08-02-2005, 03:01 PM

I think http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemcollectionsarraylistclassitemtopic.asp

see the "Item" property.

is what you need. MSDN is really good to explore and get familiar with most classes.

CompURocket · 08-02-2005, 03:34 PM

If you know that all the elements are of the same type in the array list and you know what that type is then you could use the foreach keyword.

Example:

Code:

//ArrayList contains Control objects

foreach (Control c in myArrayList)
{c.Visible = false;}

LT

**nvoigt** · 08-03-2005, 01:39 AM

Actually, you don't even need to know this at compile time

Code:

//ArrayList contains Control objects
foreach ( object o in myArrayList )
{
    MessageBox.Show( o.ToString() );
}

CompURocket · 08-03-2005, 09:34 AM

Well, you do have to know the type if you want to do anything with it other than call ToString() and the other methods offered by System.Object.

LT

08-02-2005, 02:31 PM	#1
osal Registered User Join Date: May 2004 Posts: 215	Getting an element from an ArrayList Lets say I wanted to get each element from an ArrayList, how could that be done. Im trying to use a for loop, but I cannot figure out how to get the element out of the ArrayList.
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08-02-2005, 03:34 PM	#3
CompURocket Registered User Join Date: Jan 2004 Posts: 37	If you know that all the elements are of the same type in the array list and you know what that type is then you could use the foreach keyword. Example: Code: //ArrayList contains Control objects foreach (Control c in myArrayList) { c.Visible = false; } LT
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08-03-2005, 01:39 AM	#4
nvoigt the hat of redundancy hat Join Date: Aug 2001 Location: Hannover, Germany Posts: 2,769	Actually, you don't even need to know this at compile time Code: //ArrayList contains Control objects foreach ( object o in myArrayList ) { MessageBox.Show( o.ToString() ); } __________________ hth -nv She was so Blonde, she spent 20 minutes looking at the orange juice can because it said "Concentrate." When in doubt, read the FAQ. Then ask a smart question.
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08-03-2005, 09:34 AM	#5
CompURocket Registered User Join Date: Jan 2004 Posts: 37	Well, you do have to know the type if you want to do anything with it other than call ToString() and the other methods offered by System.Object. LT
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