Question

Currently, I have this:

if ((input.Text.ToUpper() == "FURNACE" || input.Text.ToUpper() == "COAL") && count == 3)
                {
                    end3();
                }
                else
                {
                    MessageBox.Show("Unknown key");
                }

However, no matter if I enter FURNACE, COAL, or anything else, it still pops up with “Unknown key”. Why?

It’s under a KeyUp event, like this:

private void input_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.KeyData == Keys.Enter)
        { 
          //The earlier code I showed goes here
        }
    }

Count varies, one of the if (input.Text.ToUpper…) is adding one to count, but it starts at zero.

Input is a textbox.

Answer 1

I think that you are missing e.SuppressKeyPress = true; right after you enter to the if so when you press enter it will not appear as char in your text.

private void input_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyData == Keys.Enter)
    { 
        e.SuppressKeyPress = true;
        if ((input.Text.ToUpper() == "FURNACE" || input.Text.ToUpper() == "COAL") && count == 3)
        {
            end3();
        }
        else
        {
            MessageBox.Show("Unknown key");
        }
    }
}