using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Label1.Text = TextBox1.Text;
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        /*
         * TextBox4.Text = Convert.ToString(
             Convert.ToInt32(TextBox2.Text) *
             Convert.ToInt32(TextBox3.Text));
        */
        try
        {
            int arv1 = Convert.ToInt32(TextBox2.Text);
            int arv2 = Convert.ToInt32(TextBox3.Text);
            int vastus = -1;
            string tehe = DropDownList1.Text;
            if (tehe.Equals("+"))
            {
                vastus = arv1 + arv2;
            }
            if (tehe.Equals("-"))
            {
                vastus = arv1 - arv2;
            }
            if (tehe.Equals("x"))
            {
                vastus = arv1 * arv2;
            }
            if (tehe.Equals("/"))
            {
                vastus = arv1 / arv2;
            }
            TextBox4.Text = vastus.ToString();
        }
        catch (Exception ex) {
            TextBox4.Text = "Tekkis viga: " + ex.ToString();
        }
    }

}