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How to allow the user to copy items from listbox and paste outside of windows form

I know that, for data grids, users can select the items, copy them, and then paste them outside of the form. Is there was a way to do that with listboxes? It looks like you can select multiple items in the listbox but it doesn't appear that it actually copies it if you try to paste the selected values outside of the form.

You can catch the event when user click ctrl + c to put the item to the clipboard.
This code is for the list box with multi-selection MultiSimple=true
private void ListBox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
if (e.Control && e.KeyCode == Keys.C)
{
System.Text.StringBuilder copy_buffer = new System.Text.StringBuilder();
foreach (object item in ListBox1.SelectedItems)
copy_buffer.AppendLine(item.ToString());
if (copy_buffer.Length > 0)
Clipboard.SetText(copy_buffer.ToString());
}
}

To copy selected item via Ctrl+C use this code:
private void LstVehicles_KeyDown(object sender, KeyEventArgs e)
{
if (e.Control && (e.KeyCode == Keys.C))
{
Clipboard.SetText(this.yourListBoxName.SelectedItem.ToString());
}
}

Those 2 solutions didn't work for me, what did work was though clicking on the listBox, and generating a function called
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
inside I put...
Clipboard.SetDataObject(this.listBox1.SelectedItem.ToString());
So the complete solution was
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
Clipboard.SetDataObject(this.listBox1.SelectedItem.ToString());
}
So did get a line from one of the solutions and one of the comments.
Thanks.

I can select only one line in the listbox, I know it not the best,
but by code below left mouse click copy all the listbox Items
to the Clipboard:
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
System.Text.StringBuilder copy_buffer = new System.Text.StringBuilder();
foreach (object item in listBox1.Items)
copy_buffer.AppendLine(item.ToString());
if (copy_buffer.Length > 0)
Clipboard.SetText(copy_buffer.ToString());
}

How can I manage overlapping DropDownBox drawers?

Most of my dropdown boxes use the SuggestAppend property, meaning when you start typing in the box, it will make a shortlist of the items that match your case. However, if I do this after opening the drawer, this happens:
I have tried using this method, but it closes both instead of just one:
private void cmbLoc_TextChanged(object sender, EventArgs e)
{
if (cmbLoc.Text != "")
{
cmbLoc.DroppedDown = false;
}
}
I am trying to have it so that when I type something into the text box, the original dropdown will disappear, and the SuggestAppend draw will appear. How can I manage this?

It worked if I used KeyDown. Try and tell if that helps
private void cmbLoc_KeyDown(object sender, KeyEventArgs e)
{
var comboBox = (ComboBox)sender;
comboBox.DroppedDown = false;
}

I want to show any selected item from CheckedListBox in a ListBox in C#

I have a windows form application that contains one "CheckedListBox" named "ChkBox1" and it contains this items (Blue, Red, Green, Yellow).
The form contains also an empty "ListBox" named "LstBox1".
I want when i check any item from "ChkBox1" it add to "LstBox1" and when i unchecked it from "ChkBox1" it removed from "LstBox1".
I think i should use "ItemChecked" event but i don't know how can i detect if the item checked or not and add it to another list.
This is my try:
private void ChkBox1_ItemCheck(object sender, ItemCheckEventArgs e)
{
if (ChkBox1.CheckedItems.Count > 0)
listBox1.Items.Add(ChkBox1.Items[e.Index]);
else if (ChkBox1.CheckedItems.Count == 0)
listBox1.Items.Remove(ChkBox1.Items[e.Index]);
}
but it add the item when i unchecked it not when i check it.
and this is another try:
private void ChkBox1_ItemCheck(object sender, ItemCheckEventArgs e)
{
if (ChkBox1.GetItemChecked(e.Index) == true)
listBox1.Items.Add(ChkBox1.Items[e.Index]);
else if (ChkBox1.GetItemChecked(e.Index) == false)
listBox1.Items.Remove(ChkBox1.Items[e.Index]);
}

Try this:
private void ChkBox1_ItemCheck(object sender, ItemCheckEventArgs e)
{
if (e.NewValue == CheckState .Checked)
{
listBox1.Items.Add(ChkBox1.Items[e.Index]);
}
else
{
listBox1.Items.Remove(ChkBox1.Items[e.Index]);
}
}

The "ItemChecked" will send you an "ItemCheckEventArgs" that contains both the old and the new value.
It also contain the index of the value that has changed.
You can also check the "CheckedItems" property to get every checked items :
private void ChkBox1_ItemCheck(object sender, ItemCheckEventArgs e)
{
LstBox1.Items.Clear();
foreach (var item in ChkBox1.CheckedItems)
LstBox1.Items.Add(item);
}

c# listbox - first selected item is played

Here is my problem: I have a TextBox, button, and a ListBox. The functions works right but whenever I search flash videos, the moment I click the search button, the first video on the list is played. I don't want it to be played on that time - I want to choose from the list without playing the first highlighted item on the ListBox.
Here is my code:
private void button1_Click(object sender, EventArgs e)
{
var path = "C:\\Users\\John\\Desktop\\Video\\FLASH";
listBox1.DataSource = Directory.GetFiles(path, "*" + txtbox1.Text + "*")
.Select(f => Path.GetFileName(f))
.ToList();
}
This is the search button. It will search the text on textbox1 from the specified path:
private void listBox1_DoubleClick(object sender, EventArgs e)
{
var fileName = listBox1.SelectedItem as string;
if (fileName != null)
{
var path = Path.Combine("C:\\Users\\John\\Desktop\\Video\\FLASH", fileName);
Process.Start(path);
}
}
This is the ListBox, the searched items will be here, but there is always one item selected and that item plays whenever the search finished.

Fill the list, then add the selectedindexchanged event handler. (Make sure that the event isn't added for you by the designer).
So,
listBox1.DataSource = ...
listBox1.SelectedIndexChanged +=
new System.EventHandler(this.listBox1_SelectedIndexChanged);

open and save file dialog

i use an openFileDialog to read from a text file and print the values in a listbox and a saveFileDialog to save the changes in textfile.i wrote this code but it doesn't work.if a change the listbox with a textbox works fine.But i need to print and save the items into a listbox.any suggestions?
private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
{
}
private void button4_Click(object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
label7.Text = openFileDialog1.FileName;
listBox1.Text = File.ReadAllText(label7.Text);
}
}
private void button5_Click(object sender, EventArgs e)
{
if (saveFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
File.WriteAllText(saveFileDialog1.FileName, listBox1.Text);
}
}

You need to add each line of the file as a listbox item. Then, to save, loop through each listbox item and write it as a new line.
You can use File.ReadAllLines and listBox1.Items.AddRange to add the items.
listBox1.Items.AddRange(File.ReadAllLines(openFileDialog1.FileName));
Since the Items property contains objects, not strings, you will need to manually loop over the items and write them individually... perhaps doing something like
StringBuilder sb = new StringBuilder();
foreach(object item in listBox1.Items) {
sb.AppendLine(item.ToString();
}
File.WriteAllText(saveFileDialog1.FileName, sb.ToString());

ListBox.Text represents only a selected part of the list box items.
A quote from MSDN docs:
When the value of this property is set to a string value, the ListBox searches for the item within the ListBox that matches the specified text and selects the item. You can also use this property to determine which items are currently selected in the ListBox
This should work :
using System.Linq;
...
string[] lines = File.ReadAllLines(fileName);
listBox.Items.AddRange(lines.ToArray<object>());