ASP.NET图书管理系统简单实现步骤「建议收藏」

1.  用户注册登录
2.  两种身份：管理员和读者
3.  读者能够注册自己的账号和密码还有填写自己的个人信息
4.  读者根据自己需求的借阅和归还图书
5.  管理员可以增、减、查、改等图书信息，修改用户信息待完善

try
        {
            //赋予sql字符串数据
            string strsql1 = "insert into yhxx (zh,mima) values ('" + Tet_zh.Text + "','" + Tet_mima.Text + "')";
            //创建字符串对象
            mycom = new SqlCommand(strsql1, myconn);
            mycom.ExecuteNonQuery();
            //关闭数据库
            myconn.Close();
            Response.Write("<script>alert('添加成功！！')</script>");
            //保存账号
            //str = Tet_zh.Text;
            //保存用户名
            Application["name"] = Tet_zh.Text;
            //如果成功了成功转入
            Response.Redirect("Useradd.aspx");
        }
        catch (Exception ex)
        {
            Response.Write("<script>alert('用户已存在！！')</script>");
        }

protected void tianjia()
    {
        //添加用户信息
        try
        {
            //赋予sql字符串数据
            
            string strsql1 = "update yhxx set xm='"+Tet_xm.Text+"',xb='"+tet_xb.Text+"',qq='"+Tet_qq.Text+"',Email='"+Tet_email.Text+"',dizhi='"+tet_home.Text+"',enjioy='"+Tet_enjoy.Text+"'  where zh='"+Application["name"]+"'";
            // 创建字符串对象
            mycom = new SqlCommand(strsql1, myconn);
            mycom.ExecuteNonQuery();
            //关闭数据库
            myconn.Close();
            Response.Write("<script>alert('添加成功！！')</script>");
            Response.Redirect("denglu.aspx");
        }
        catch (Exception ex)
        {
            Response.Write("<script>alert('添加失败！！')</script>"+ex.Message.ToString());
        }
    }

 //普通用户登录,管理员登录雷同
        try
        {
            string sql = "select * from yhxx where zh='"+Tet_zh.Text+"' and mima='"+Tet_mm.Text+"' and yhlb='"+tet_dz.Text+"'";
            //创建命令对象
            SqlCommand com = new SqlCommand(sql,myconn);
            //创建读取对象
            SqlDataReader dr = com.ExecuteReader();
            //成功弹出提示框
            //MessageBox.Show("读取成功！！");
            if (dr.Read())
            {
                dr.Close();
                myconn.Close();
                Application["name1"] = Tet_zh.Text;
                Response.Redirect("index.aspx");
            }
            else
            {
                Response.Write("<script>alert('用户名或密码有误！！')</script>");
            }

        }
        catch (Exception ex)
        {
            Response.Write("<script>alert('登录失败！！')</script>");
        }

try
        {
            //打开数据库
            myconn.Open();
        }
        catch (Exception ex)
        {
            Response.Write("<script>alert('数据库打开失败')</script>");
        }
        try
        {
            //创建数据字符串
            if (tet_name.Text == "")
            {
                Response.Write("<script>alert('名称不能为空！')</script>");
            }
            else
            {
                string strsql3 = "select BookID as 图书编号,BookName as 图书名称,"
                                + "Booklb as 图书类别,Bookzz as 图书作者,Booklr as 图书内容,"
                                + "Bookfm as 图书封面,Bookjg as 图书价格,Bookzt as 图书借阅状态 "
                                + " from Bookxx where BookName='" + tet_name.Text + "'";
                mycom = new SqlCommand(strsql3, myconn);
                //打开数据库
                //myconn.Open();
                //
                myread = mycom.ExecuteReader();
                GridView1.DataSource = myread;
                GridView1.DataBind();
                GridView1.Visible = true;
                //关闭数据
                myread.Close();
                myconn.Close();
            }
        }
        catch (Exception ex)
        {
            Response.Write("<script>alert('查询失败！')</script>" + ex.Message.ToString());
        }

1.先添加图书
 if (myread.Read())
        {
            if (tet_zt.Text == "0")
            {
                //添加借阅信息表
                myread.Close();
                string strsql5 = "insert into Bookjyxx (ISBookID,ISBookname,ISBookzt,ISname,ISid) " +
               " values (" + Tet_Bookid.Text + ",'" + tet_Name.Text + "'," + tet_zt.Text + ",'" + Tet_xm.Text + "'," + Tet_ID.Text + ")";
                mycom = new SqlCommand(strsql5, myconn);
                mycom.ExecuteNonQuery();
                //关闭
                myconn.Close();
                myread.Close();
        //
                xiugai();
                chaxun();
            }
            if (tet_zt.Text == "1")
            {
                Response.Write("<script>alert('该书正在借阅中')</script>");
                chaxun();
            }
 2.再分别修改借阅状态
             //创建
        //先修改图书表状态信息
        string strsql7 = "update Bookxx set Bookzt='1' where BookID='" + Tet_Bookid.Text + "'";
        mycom = new SqlCommand(strsql7, myconn);
        myconn.Close();
        myconn.Open();
        mycom.ExecuteNonQuery();
        //再修改借阅状态表信息
        string strsql8 = "update Bookjyxx set ISBookzt='1' where ISBookID='" + Tet_Bookid.Text + "'";
        mycom = new SqlCommand(strsql8, myconn);
        mycom.ExecuteNonQuery();
        Response.Write("<script>alert('借阅成功！')</script>");
        //关闭
        myconn.Close();

 //删除他的借阅图书信息
        string strsql3="delete from bookjyxx where ISid='"+Tet_id.Text+"'";
        mycom = new SqlCommand(strsql3, myconn);
        myconn.Open();
        mycom.ExecuteNonQuery();
        //
       //刷新信息
        //查询信息
        string strsql4= "select ISname as 借阅者,ISid as 借阅证号码,ISBookID as 借阅书籍编号,"
           + "ISBookname as 借阅数据名称,ISBookzt as 借阅状态,ISdate as借阅日期 from Bookjyxx where ISid='" + Tet_id.Text + "'";
        mydata = new SqlDataAdapter(strsql4, myconn);
        DataSet set = new DataSet();
        mydata.Fill(set);
        GridView1.DataSource = set.Tables[0];
        GridView1.DataBind();
        GridView1.Visible = true;
        //修改状态
        //先修改图书表状态信息
        string strsql7 = "update Bookxx set Bookzt='0' where BookID='" +tet_Bookid.Text+ "'";
        mycom = new SqlCommand(strsql7, myconn);
        mycom.ExecuteNonQuery();
        Response.Write("<script>alert('归还成功!')</script>");
        //关闭
        myconn.Close();
        set.Clear();