returnman.aspx.cs

这是一个很好的图书管理系统 数据库SQL2005

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;

public partial class ReturnMan : System.Web.UI.Page
{
    BLL.T_Borrow Borrow = new BLL.T_Borrow();

    protected void Page_Load(object sender, EventArgs e)
    {
        try
        {
            //验证Session对象，判断用户是否登陆
            if (Session["UserID"].ToString() == "" || Session["UserID"].ToString() == null || Session["Level"].ToString() != "2")
            {
                Response.Redirect("Login.aspx");
                return;
            }
        }
        //Session对象未初始化，跳转登陆页面。
        catch (NullReferenceException)
        {
            Response.Redirect("Login.aspx");
        }
        lbl_UserName.Text = Session["UserName"].ToString();
    }

    protected void btn_Click(object sender, EventArgs e)
    {
        PublicClass.BorrowModel borrow = new PublicClass.BorrowModel();
        borrow.CardID = txtReaderid.Text;
        borrow.ManID = txtManid.Text;
        borrow.ReturnDate = DateTime.Now.ToString();
        Borrow.Borrow = borrow;
        int re = Borrow.ReturnBook();
        switch (re)
        {
            case -1:
                this.ClientScript.RegisterStartupScript(GetType(), "", "<script>alert('读者ID不存在')</script>");
                break;
            case 0:
                this.ClientScript.RegisterStartupScript(GetType(), "", "<script>alert('借书证号：" + borrow.CardID + " 管理编号：" + borrow.ManID + " 的还书操作完成')</script>");
                break;
            case 1:
                this.ClientScript.RegisterStartupScript(GetType(), "", "<script>alert('图书ID不存在')</script>");
                break;
            case 2:
                this.ClientScript.RegisterStartupScript(GetType(), "", "<script>alert('借书证号：" + borrow.CardID + "的读者未借 管理编号：" + borrow.ManID + " 的图书')</script>");
                break;
            case 3:
                this.ClientScript.RegisterStartupScript(GetType(), "", "<script>alert('还书操作失败')</script>");
                break;
        }
    }
}