What is the Keycode for % sign?

Question

I am using C#.Net. I have textbox which allow only number, decimal and percentage(%) sign. I have the keycode for all number and decimal, but what is the "%" sign's keycode?

How can I check the keydown event for %?

Answer 1

Something like this:

private void yourControl_KeyDown(object sender, KeyEventArgs e)
{
   if((e.KeyCode == Keys.D5) && e.Shift)
   {
      // User pressed '%' ...
   }
}

or

private void yourControl_KeyDown(object sender, KeyEventArgs e)
{
    switch(e.KeyCode)
    {
        //... 
        case Keys.D5:
            if(e.Shift)
            {
                // Handle '%'
            }
            else
            {
                // Handle '5'
            }
            break;
        // ...
    }
}

You want to check that the key being pressed is the 5 key, and that it has been modified by pressing the shift key.

Answer 2

Ascii code for "%" is 37, and in unicode &#37.

Answer 3

private void control_KeyUp(object sender, KeyEventArgs e)
{
  if (e.KeyValue == 53)
  {
    // %
  }
}

Answer 4

Here is a textbox restricting pattern:

    private void AmountPaidTextBox_KeyPress(object sender, KeyPressEventArgs e)
    {
        switch ((byte)e.KeyChar)
        {
            case 48:
            case 49:
            case 50:
            case 51:
            case 52:
            case 53:
            case 54:
            case 55:
            case 56:
            case 57:
            case 58:
            case 59:
            case 46:
            case 35:

                //This is a valid character
                e.Handled = false;
                break;
            default:
                //This is an invalid character
                e.Handled = true;
                break;

        }
    }