当前文件路径：MyLibary/Borrow/BorrowBook.aspx.cs

		            
 1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Collections;
 5using System.Web;
 6using System.Web.Security;
 7using System.Web.UI;
 8using System.Web.UI.WebControls;
 9using System.Web.UI.WebControls.WebParts;
10using System.Web.UI.HtmlControls;
11using MyLibrary.BusinessLogicLayer;
12/**////Asp.net源码下载专业站
13public partial class Borrow_BorrowBook : System.Web.UI.Page
14...{
15    protected void Page_Load(object sender, EventArgs e)
16    ...{
17
18    }
19    //借阅按钮单击事件
20    protected void imgBtnBorrow_Click(object sender, ImageClickEventArgs e)
21    ...{
22        if (Page.IsValid)
23        ...{
24            Borrow borrow = new Borrow();//创建Borrow类对象
25            Users user = new Users();//创建Users类对象
26            user.UserID = txtUserID.Text.Trim();//为user对象属性UserID赋值
27            int BorrowNum = 0;
28            if (user.LoadData(user.UserID))//查询用户并取出用户权限
29            ...{
30                int userPower = user.UserPower;
31                if (userPower == 3)//学生
32                ...{
33                    BorrowNum = 10;//最大借书量10本
34                    borrow.BorrowEndDate = Convert.ToDateTime(System.DateTime.Now.AddMonths(1).ToString());//借阅时间为1个月
35                }
36                else if (userPower == 4)//教师
37                ...{
38                    BorrowNum = 20;//最大借书量20本
39                    borrow.BorrowEndDate = Convert.ToDateTime(System.DateTime.Now.AddMonths(3).ToString());//借阅时间为1个月
40                }
41                borrow.UserID = txtUserID.Text.Trim();
42                int count = borrow.QueryCurrentBorrowCount(txtUserID.Text.Trim());//查询用户已经借阅图书量
43                if (count < BorrowNum)//如果还没有超出最大借书量，借书
44                ...{
45                    borrow.BookID = int.Parse(txtBookID.Text.Trim());
46                    borrow.BorrowBeginDate = Convert.ToDateTime(System.DateTime.Now.ToString());
47                    borrow.BorrowState = 0;
48                    if (borrow.InsertByProc())//使用Borrow类InsertByProc方法插入一条借阅记录
49                    ...{
50                        lblMessage.Text = "成功借阅该书！";
51                    }
52                    else
53                    ...{
54                        lblMessage.Text = "借书失败！";
55                    }
56                }
57                else//超出借书量，不能继续借书，给出提示
58                ...{
59                    lblMessage.Text = "该用户已借满！";
60                }
61            }
62            else//不存在该用户提示
63            ...{
64                lblMessage.Text = "不存在该用户！";
65            }
66        }
67    }
68}
69