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   源码介绍

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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)
    {
        Button btn = new Button();
        btn.Width = 50;
        btn.Text = "=";
        btn.Click  = new EventHandler(btn_Click);
        E.Controls.Add(btn);
    }

    void btn_Click(object sender, EventArgs e)
    {
        if (this.txtNum1.Text != "" && this.txtNum2.Text != "")
        {
            localhost.Service WebServiceInstance = new localhost.Service();
            int Oper = selectOper.SelectedIndex;
            switch (Oper)
            {
                case 0:
                    txtResult.Text = WebServiceInstance.addition(double.Parse(txtNum1.Text), double.Parse(txtNum2.Text)).ToString();
                    break;
                case 1:
                    txtResult.Text = WebServiceInstance.subtruct(double.Parse(txtNum1.Text), double.Parse(txtNum2.Text)).ToString();
                    break;
                case 2:
                    txtResult.Text = WebServiceInstance.multiplication(double.Parse(txtNum1.Text), double.Parse(txtNum2.Text)).ToString();
                    break;
                case 3:
                    txtResult.Text = WebServiceInstance.division(double.Parse(txtNum1.Text), double.Parse(txtNum2.Text)).ToString();
                    break;

            }
        }
    }


}