Comments on: Separator Delimited ToString for Array, List, Dictionary, Generic IEnumerable

By: Avi

Avi — Sun, 07 Mar 2010 23:25:30 +0000

Using the generic type “System.Collections.Generic.IEnumerable requires ‘1′ type arguments

I think it’s something to do with using of System.Collection vs. System.Collections.Generic for IEnumerable.

By: Zohar

Zohar — Fri, 22 Jan 2010 09:54:49 +0000

Can I just say few warm words It’s so nice here, good atmosphere, well done !.
I am from Sudan and too poorly know English, give please true I wrote the following sentence: “Files are also alternative to stick criminal states of their second, free from any court or available psychologist that may be argued by the restrictions of their killing, criminal justice.”

THX 8), Zohar.

By: IndyCoder

IndyCoder — Wed, 23 Dec 2009 21:55:02 +0000

Thank you! Solved a particular annoying issue I had to deal with. List being passed as a comma separated list to a stored procedure (which then parsed it into a single column table of uniqueidentifier).
I was looking around for ways to deal with this and had found one that was a method that had a string builder in it…but I like yours a lot better. Worked perfect for me when I just copy/pasted the code here on the page. Just had to add a Using System.Collection; to cover the second method. After that, a using that referenced the module I put this in, and I was good to go. THANKS!

By: Augustandre

Augustandre — Tue, 27 Oct 2009 16:47:37 +0000

Thanks.

By: admin

admin — Wed, 30 Sep 2009 01:12:27 +0000

@kissedsmiley
Thanks for point out the point. But one correction in your comment. ArrayList wouldn’t have the ToString extension method applied because it implements IEnumerable(not generic IEnumerable). Therefore, I’ve added

public static string ToString(this IEnumerable source, string separator)
{…}

Console.WriteLine(arrayList .ToString(”:”));

will work for you now.

By: kissedsmiley

kissedsmiley — Tue, 29 Sep 2009 15:46:07 +0000

thank you for this nice post. note that due to a typo, the ArrayList test is not performed:

ArrayList arrayList = new ArrayList() { 1, 2, 3 };
Console.WriteLine(intArray.ToString(”:”));

If one changes the ‘intArray’ to ‘arrayList’, it will fail because ArrayList has no ToString method! So the only way I know of to get around it is by writing a wrapper class or building a custom, local handler, either of which is ugly.

By: admin

admin — Sat, 04 Jul 2009 12:03:23 +0000

Hi Thorsten,

I had a look at your generic ToString by using reflection, that is good.
But reflection is quite expensive operation. I don’t think it fits the collection, enumerable scenario.
string.Join for array is optimized by .net, it is very fast operation.

By: Thorsten

Thorsten — Fri, 03 Jul 2009 15:07:49 +0000

Maybe there is a way to make this work with my Generic ToString() method? So far it fails returning the contents of a list correctly, therefore I have to copy it to an array.
As far as I understand though, essentially you are also copying to an array first. Do you think there are any other solutions, since this could become a performance issue for large lists.
Maybe you can have a look and just leave a comment, to let me know what you think?

Here the link to the blog I mentioned in the previous comment: Here it is

By: admin

admin — Wed, 10 Jun 2009 09:07:39 +0000

Hi Zullu,
You can download the solution file by clicking the link at bottom of this post. or http://www.codemeit.com/wp-content/uploads/2008/09/tostringextensionmethod.zip

By: Anonymous

Anonymous — Mon, 08 Jun 2009 19:49:40 +0000

Hi,
I was trying this code but I keep getting this error:
“No overload for method takes 1 argument.” on all the Console.WriteLine as in this case.
Console.WriteLine(intArray.ToString(”,”));

Also I did not understand what do you mean by fixing the tag :
public static string ToString(this IEnumerable source, string separator) { }

Please elaborate.
Zullu

By: kk

kk — Mon, 27 Apr 2009 18:53:42 +0000

Thanks. This was really useful. Helped me save time. However your page does not show up on a google/live search?

By: admin

admin — Mon, 03 Nov 2008 05:37:49 +0000

Sometimes, the code highlighter remove tags, thanks for pointing this out, I have fixed it.

By: Anonymous

Anonymous — Wed, 29 Oct 2008 09:21:52 +0000

Very useful, just what I was looking for actually. I had to add the tag to make it work though:

public static string ToString(this IEnumerable source, string separator) { }