ASP.NET实现图书管理系统的步骤详解_实用技巧_

 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(""); //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(""); }

 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(""); Response.Redirect("denglu.aspx"); } catch (Exception ex) { Response.Write(""+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(""); } } catch (Exception ex) { Response.Write(""); }

 try { //打开数据库 myconn.Open(); } catch (Exception ex) { Response.Write(""); } try { //创建数据字符串 if (tet_name.Text == "") { Response.Write(""); } 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("" + 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(""); 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(""); //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(""); //关闭 myconn.Close(); set.Clear();