How do I copy textbox value(string, integer) from textchanged event to listbox?

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I have one textbox and i will read to the values with barcode scanner continuous with textchanged event to listbox.
What is the best procedure for this?

What I have tried:

private void tb_vonalkod_TextChanged(object sender, EventArgs e)

Textbox1.Text=ListBox1.Text;

Posted 4-Feb-20 0:02am

Member 13873270

Updated 4-Feb-20 0:33am

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Richard MacCutchan 4-Feb-20 6:26am

Why are you copying a ListBox item into the TextBox? You need to do it the other way round.

Member 13873270 4-Feb-20 6:34am

I will reverse this method. Textbox to Listbox

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phil.o · Answer 1 · 2020-02-04T00:34:00

You may use the Validated event of the textbox instead. And Richard is right, you should populate the listbox with the text from the textbox, not the other way around. Moreover, there is no point in using the Text property on a listbox, since by essence it is meant to display a list of items. Better add to its Items collection instead.

C#

private void tb_vonalkod_Validated(object sender, EventArgs e)
{
   // Uncomment the next line to empty the listbox if needed
   // ListBox1.Items.Clear();
   ListBox1.Items.Add(TextBox1.Text);
}