private void Button_Click(object sender, RoutedEventArgs e)
{
Button obj = sender as Button;
string strip = obj.Content.ToString();
if (strip[0] >= '0' && strip[0] <= '9')
{
textbox1.Text = textbox1.Text + strip;
}
else if (strip[0] == '-' || strip[0] == '+' || strip[0] == '*' || strip[0] == '/')
{
operation = strip[0];
ip1 = Convert.ToInt32(textbox1.Text);
textbox1.Text = "";
}
else if (strip[0] == '=')
{
ip2 = Convert.ToInt32(textbox1.Text);
textbox1.Text = "";
if (operation == '+')
{
aobj.no1 = ip1;
aobj.no2 = ip2;
textbox1.Text = aobj.Add().ToString();
}
else if (operation == '-')
{
aobj.no1 = ip1;
aobj.no2 = ip2;
textbox1.Text = aobj.Sub().ToString();
}
else if (operation == '*')
{
aobj.no1 = ip1;
aobj.no2 = ip2;
textbox1.Text = aobj.mul().ToString();
}
else if (operation == '/')
{
aobj.no1 = ip1;
aobj.no2 = ip2;
textbox1.Text = aobj.div().ToString();
}
}
}