Hi

I have a textbox and a listbox.
If i write something into the textbox and press the enter key, i would like the content of the textbox to appear in the listbox. What is the best way to do it?

Thanks in advance

create a event handler for KeyDown for the textbox. then in the method add

if (e.KeyCode == Keys.Enter)
            {
                listbox1.Items.Add(textBox1.text);
            }

substitute the listbox1 for the correct name, and textbox1 for the appropriate name as well.

Well you can try this as well:

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Return)
                addItemToList();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            addItemToList();
        }

        private void addItemToList()
        {
            if (textBox1.Text.Length==0)
                return;

            listBox1.Items.Add(textBox1.Text);
            textBox1.Text = "";
        }

Using the KeyDown event of the text box for capturing Enter isn't always safe. If the form has a DefaultButton set then the button will receive the Enter key press, and the textbox event will never fire. What you can do is override ProcessCmdKey() :

private void frmTestKeyDown_Load(object sender, EventArgs e)
    {
      this.AcceptButton = button1;
    }

    protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
      if (((keyData & Keys.Enter) == Keys.Enter) && this.textBox1.Focused)
      {
        listBox1.Items.Add(textBox1.Text);
        return true; //stops the key from being further processed
      }
      else
      {
        return base.ProcessCmdKey(ref msg, keyData);
      }
    }
Comments
Sharp observation
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