?using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
using System.Data.SqlClient;

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

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        //連接本地計算機的數據庫
        SqlConnection cn = new SqlConnection("Server=.;database=Mylibrary;uid=sa;pwd=123");
        //cn.Open();
        string constring = "delete from jieyue  where 圖書編號='" + BookID2.Text + "'AND ReaderID='" + ReaderID2.Text + "'";
        //創建Command對象
        SqlCommand cm = new SqlCommand(constring, cn);
        try
        {
            cn.Open();
            int r = cm.ExecuteNonQuery();
            if (r == 1)
            {
                lblmessage.Text = "還書成功！";
            }
            else
            {
                lblmessage.Text = "還書失敗！";
            }
        }
        finally
        {
            cn.Close();
        }
    }
}