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

Recommended Answers

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, …
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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);
      }
    }
commented: Sharp observation +6
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