using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (valuebox1.Text.Length > 0 && valuebox2.Text.Length > 0)
{
double result = 0;
double value1 = Convert.ToDouble(valuebox1.Text);
double value2 = Convert.ToDouble(valuebox2.Text);
switch (DropDownList1.SelectedValue)
{
case "+":
result = value1 + value2;
break;
case "-":
result = value1 - value2;
break;
case "*":
result = value1 * value2;
break;
case "/":
result = value1 / value2;
break;
}
output.Text = result.ToString();
}
else
{
output.Text = string.Empty;
}
}
}