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asp.net - arraylist to comma delimited string

Posted on 2010-11-16
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Last Modified: 2012-06-27
I have an ArrayList with x number of items.
I would like to convert this ArrayList into a comma delimited string.
In addition, each item must be surrounded by single quotes.

This is what I have so far:

            strString = String.Join(",", arrArrayList.ToArray)

This gives me:

            strString = "item1, item2, item3, item4"


This is what I need:

            strString = "'item1', 'item2', 'item3', 'item4'"



Thank you.
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Question by:Rick
7 Comments
 
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Assisted Solution

by:p_davis
p_davis earned 50 total points
ID: 34148459

unfortunately, i think you will have to address each string in the array

and then just build the string

str = "'" + str.Trim() + "'"

and then after that call the string join on the array.
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LVL 33

Assisted Solution

by:Todd Gerbert
Todd Gerbert earned 50 total points
ID: 34148475
Here's a simple function to loop through each item in the array, appending each one to a StringBuilder.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
	class Program
	{
		static void Main(string[] args)
		{
			ArrayList list = new ArrayList();

			list.AddRange(new string[] { "One", "Two", "Three" });

			string combined = ArrayListToCommaDelimited(list);
			
			Console.WriteLine(combined);
			Console.ReadKey();
		}

		private static string ArrayListToCommaDelimited(ArrayList array)
		{
			StringBuilder commaString = new StringBuilder();
			for (int i = 0; i < array.Count - 1; i++)
				commaString.AppendFormat("'{0}',", array[i]);
			commaString.AppendFormat("'{0}'", array[array.Count - 1]);
			return commaString.ToString();
		}
	}
}

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LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 400 total points
ID: 34148487
What about this:
strString = "'" + String.Join("', '", arrArrayList.ToArray) + "'"

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LVL 75

Accepted Solution

by:
käµfm³d   👽 earned 400 total points
ID: 34148508
The eerie thing is I came up with this not 5 minutes prior to reading your question for one of my own projects...  spooky  ;)
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LVL 13

Author Closing Comment

by:Rick
ID: 34148566
I almost had it.

strString = " String.Join("', '", arrArrayList.ToArray) + "'"

Thank you.


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LVL 32

Expert Comment

by:Erick37
ID: 34148582
You could loop the array and quote the strings one at a time:
Dim a() As Object = arrArrayList.ToArray

		For i As Integer = 0 To a.Count - 1
			a(i) = String.Format("'{0}'", a(i))
		Next

		strString = String.Join(",", a)

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LVL 75

Expert Comment

by:käµfm³d 👽
ID: 34148618
NP. Glad to help  :)
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