Converting a list to an array with ToArray()

Question

I've created a class called listItem and the following list:

List<listItem> myList = new List<listItem>();

At some point in my code, I want to convert it to an array, thereby using:

listItem[] myArray = myList.ToArray();

Unfortunately, this doesn't work, and I get this error message:

Cannot convert [...] listItem[] to [...] List<listItem>

I tried to figure this out, but very unsuccessfully...

Thanks in advance.

EDIT: My bad, the first code line I wrote was indeed mistyped!

Actually, all the code above works pretty well. My error was due to the fact that my function:

List<listItem> myFunction()

returned myArray, hence the conversion problem... It is now fixed. :)

Thank you all for your answers.

Your first line won't compile to start with, and the error message suggests a conversion the other way round. Please show a short but complete program demonstrating the problem, and the verbatim error message. — Jon Skeet
– Jon Skeet, Commented Apr 3, 2012 at 9:20
Is that typed in correctly? Your issue seems to have nothing to do with the ToArray() call. — Ritch Melton
– Ritch Melton, Commented Apr 3, 2012 at 9:20
The error message you've posted relates to converting array of ListItems into List<ListItem>, not the other way around. List<ListItem>.ToArray() should work perfectly fine. Post whole code or whole error message. — SiliconMind
– SiliconMind, Commented Apr 3, 2012 at 9:21

Gabber · Accepted Answer · 2012-04-03 09:46:30Z

15

This is the error (as pointed out from Darkshadw and Jon Skeet)

listItem myList = new List<listItem>();

You are assigning the value of a List to a listItem.

Replace it with

List<listItem> myList = new List<listItem>();

to create a list of listItem. Then

listItem[] myArray = myList.ToArray();

will work.

answered Apr 3, 2012 at 9:46

Gabber

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3 Comments

GvSharma Over a year ago

How to give size?

Gabber Over a year ago

To get size: myArray.size. To set: myArray = new Array[5]; but deletes old array

Rajkumar M Over a year ago

It works. ToArray() on a List converts the list to array depending on the type. Thanks.

Irvin Dominin · Accepted Answer · 2015-10-14 16:30:47Z

2

have you tried

listItem[] myArray = myList.ToArray(new listItem[]{});

in Java it works, im not sure in c#

edited Oct 14, 2015 at 16:30

Irvin Dominin

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answered Apr 3, 2012 at 9:24

user983652

Comments

R.D. · Accepted Answer · 2012-04-03 09:25:23Z

0

string[] s = myList.ToArray();

Considering myList is list of string

answered Apr 3, 2012 at 9:25

R.D.

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