How to concat Listbox values into string in Winforms

Question

0.00/5 (No votes)

See more:

Hello,
I want to know how to concat ListBox values into a string or an array in winforms. Can you guide me or send any code snippets?

Thanks in advance!

[EDIT] : Duplicate question How to concat Listbox values into string in Winforms[^] <-- Duplicate already deleted by Manfred R. Bihy[^]

Posted 12-Jun-12 3:27am

kingsa

Updated 12-Jun-12 3:35am

Manfred Rudolf Bihy

v6

Add a Solution

3 solutions

Solution 3

C#

//Below linq query concat all the selected item
 string required =listBox1.SelectedItems.Cast<string>().Aggregate((a, b)=>a+b);

//Below linq query concat all the distinct selected item
 string required =listBox1.SelectedItems.Cast<string>().Distinct()
                  .Aggregate((a, b)=>a+b);

//Below linq query concat all the selected item with a string in between
 
string required =listBox1.SelectedItems.Cast<string>().Distinct()
                  .Aggregate((a, b)=>a+","+b);

Posted 10-Jun-15 0:15am

sasanka sekhar panda

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

VJ Reddy · Accepted Answer · 2012-06-12T07:10:00

The solution 1 given by OriginalGriff is good.

Alternatively, using string.Join method and LINQ can be used as follows

C#

//Here object is used as Type argument as the type of items is not given in
//the question. Otherwise, if the type of items in listBox is Person
//then .OfType<Person> can be used

//Array of Items as strings
string[] itemsAsStrings = (from p in listBox1.Items.OfType<object>()
                           select p.ToString()).ToArray();

//Array of Items
object[] arrayOfItems = listBox1.Items.OfType<object>().ToArray();

//Concatenation of all items of list box
string allItems = string.Join(", ",listBox1.Items.OfType<object>());

//Concatenation of selected tiems of list box
string selectedItems= string.Join(", ",listBox1.SelectedItems.OfType<object>());

OriginalGriff · Accepted Answer · 2012-06-12T03:32:00

Solution 1

Best way is to use a StringBulder:

C#

StringBuilder sb = new StringBuilder();
foreach (object o in myListBox.SelectedItems)
    {
    sb.AppendLine(o.ToString());
    }
string s = sb.ToString();

Posted 12-Jun-12 3:32am

OriginalGriff

Comments

VJ Reddy 12-Jun-12 13:11pm

Good answer. 5!

Maciej Los 12-Jun-12 13:14pm

Agree with you ;) +5