C# - textBox PlaceHolder 구현

https://www.youtube.com/watch?v=VFeYyC_4It0 

 

        private void textBox_naverid_Enter(object sender, EventArgs e)
        {
            if( textBox_naverid.Text == "아이디")
            {
                textBox_naverid.Text = "";
                textBox_naverid.ForeColor = Color.Black;
            }
        }

        private void textBox_naverpw_Enter(object sender, EventArgs e)
        {
            if (textBox_naverpw.Text == "비밀번호")
            {
                textBox_naverpw.Text = "";
                textBox_naverpw.PasswordChar = '●';
                textBox_naverpw.ForeColor = Color.Black;
            }
        }

        private void textBox_naverid_Leave(object sender, EventArgs e)
        {
            if (textBox_naverid.Text == "")
            {
                textBox_naverid.Text = "아이디";
                textBox_naverid.ForeColor = Color.Silver;
            }
        }

        private void textBox_naverpw_Leave(object sender, EventArgs e)
        {
            if (textBox_naverpw.Text == "")
            {
                textBox_naverpw.Text = "비밀번호";
                textBox_naverpw.PasswordChar = '\0';
                textBox_naverpw.ForeColor = Color.Silver;
            }
        }