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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
double a = Convert.ToDouble(TextBox1.Text);//¶¨ÒåÒ»¸ö±äÁ¿a£¬°ÑTextBox1ÖеÄÖµ¸³¸øËü
double b = Convert.ToDouble(TextBox2.Text);//¶¨ÒåÒ»¸ö±äÁ¿b£¬°ÑTextBox2ÖеÄÖµ¸³¸øËü
/*¶¨ÒåµÄ±äÁ¿Îª¸¡µãÐÍ*/
if(DropDownList1.SelectedValue == "+" )//»ñȡѡÔñµÄÔËËã·û£¬È·¶¨ÔËËãÀàÐÍ
{
TextBox3.Text = Convert.ToString(a + b);
}
else if (DropDownList1.SelectedValue == "-")
{
TextBox3.Text = Convert.ToString(a - b);
}
else if (DropDownList1.SelectedValue == "*")
{
TextBox3.Text = Convert.ToString(a * b);
}
else if (DropDownList1.SelectedValue == "/")
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