Key Press , Key down , key up?

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Hello ,

i have read the key press, key down , key up event but i couldn't test it by any code example ... may u help me please for a simple code of this events ...?

i tried it but not working when i press Enter Key? :(

C#

private void textBox1_Keydown(object sender, KeyPressEventArgs e)
       {
           if (e.KeyChar == (char)Keys.Enter)
           {
               string s = textBox1.Text;
               messagebox.show("Enter is down " + s);

           }
       }

many thanks

Posted 7-Dec-12 7:33am

lida zar

Updated 7-Dec-12 7:43am

v4

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lida zar 7-Dec-12 14:12pm

and how keu up event work then?

1 solution

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Thomas Daniels · Accepted Answer · 2012-12-07T07:49:00

Solution 1

For a KeyDown event, you've a KeyEventArgs as a parameter, not a KeyPressEventArgs.
You should use a KeyPressEventArgs as a parameter for the KeyPress method.
Set the parameter to a KeyEventArgs (or use a KeyDown event instead of a KeyPress event) and try this:

C#

private void textBox1_Keydown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Up) // or Keys.Down, Keys.Left, Keys.Right
    {
         // do something...
    }
}

Hope this helps.

Posted 7-Dec-12 7:49am

Thomas Daniels

Updated 7-Dec-12 7:52am

v4

Comments

lida zar 7-Dec-12 13:57pm

thanks and how use key up event?

Nelek 7-Dec-12 16:08pm

The same as key down, the difference is when they are trigger. One is when you put your finger on it, the other is when you move your finger off.