Load arraylist into a TextBox

Question

I have another question and I can't seem to find anything on Google.

What this program does
This program displays the information from an RSS feed.

Question
How can I load all the items from an Arraylist to a TextBox?

Things I have tried
This is what I have so far:

List<Array> list1 = new List<Array>();

foreach (var item in list1)
        {
            textBox1.AppendText(item.ToString());
        }

Problem
When I do this, the TextBox shows this:

System.String[]System.String[]

Instead of:

Recommended Build for CraftBukkit: 1.2.4-R1.0 (build 2126) http://dl.bukkit.org/downloads/craftbukkit/view/00993_1.2.4-R1.0/

Does anybody have any idea how this array stuff work?
Do I need to loop through the array and search for specific indexes?

Sorry, but I'm still a little bit new to C#, and sorry for my English I'm Dutch :<.

Oh yea sorry, this is how I define the list: List<Array> list1 = new List<Array>(); — Yuki Kutsuya
– Yuki Kutsuya, Commented Apr 4, 2012 at 8:51
seems item type is string[], so what you can do is string.Join(',', item) — mshsayem
– mshsayem, Commented Apr 4, 2012 at 8:51

Manitra Andriamitondra · Accepted Answer · 2012-04-04 08:53:26Z

2

It looks like you ArrayList contains array of string instead of string. So try this :

foreach (var item in list1.OfType<string[]>().SelectMany(i => i))
{
    textBox1.AppendText(item);
}

answered Apr 4, 2012 at 8:53

Manitra Andriamitondra

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4 Comments

cnd Over a year ago

for what .SelectMany(i => i) ?

Yuki Kutsuya Over a year ago

@Manitra Andriamitondra This seems to work perfectly :)! Thank you! EDIT: I can't accept the answer yet, need to wait another 7 minutes ):.

Manitra Andriamitondra Over a year ago

SelectMany() converts a list of list to a flat list

cnd Over a year ago

There must be something alike Concat or All for it. (I'm not really sure but I think so)

Marc · Accepted Answer · 2012-04-04 08:52:44Z

0

It seems that item is a string array, so try to implode it:

foreach (var item in list1)
{
    textBox1.AppendText(string.Join("", item));
}

answered Apr 4, 2012 at 8:52

Marc

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Comments

Nikhil Agrawal · Accepted Answer · 2012-04-04 09:03:04Z

0

Your code is basically a list of array. That's why it is showing system.string[]

Change it to

foreach (var item in list1)
{
    textBox1.AppendText(string.Join("", item));
}

It will join your each string[] (i.e. item) in List<> and create it like

firstarrrayfirstitem, firstarrayseconditem

and textbox as

firstarrrayfirstitem, firstarrayseconditem, secondarrayfirstitem, secondarrayseconditem.... and so on.

edited Apr 4, 2012 at 9:03

answered Apr 4, 2012 at 8:55

Nikhil Agrawal

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Comments

weeyoung · Accepted Answer · 2012-04-04 09:15:38Z

0

A better way could be to use a stringbuider for better performance and reduction in a propertychanged event called by the textbox;

System.Text.StringBuilder sb = new System.Text.StringBuilder();

foreach (var item in list1.OfType<string[]>().SelectMany(i => i))
{
    sb.Append(item);
}

textBox1.Text = sb.ToString();

answered Apr 4, 2012 at 9:15

weeyoung

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Comments

DaveShaw · Accepted Answer · 2012-04-04 15:59:05Z

0

Better way:

textBox1.Text = string.Join("", list1.OfType<string[]>().SelectMany(i => i));

edited Apr 4, 2012 at 15:59

DaveShaw

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answered Apr 4, 2012 at 13:18

Jnana Swain

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