运行显示SA登陆失败是什么原因、

怎么打开文件的？好像没有项目那个文件

我是初学者，进来学习一下

想问下，那个借书为什么一直是该用户已借满？还有程序没有连贯在一起，用户借书情况不能实现啊

<span>第一次发帖子&nbsp; 恳求各位网友帮助。。下边的代码是我在</span><a href="http://www.51aspx.com/CV/MyLibary/" target="_blank"><span>http://www.51aspx.com/CV/MyLibary/</span></a><span> 下载的，进过调试后发现有问题---功能实现不了，只是提示 "借书失败！" 或是 "不存在该用户！";我不知道该怎么样改，真诚希望网友能给我改一下，解决我的难题！（QQ<a href="mailto:angel0608@126.com" target="_blank">******</a>）谢谢！！<br /> <br /> <br /> using System;<br /> using System.Data;<br /> using System.Configuration;<br /> using System.Collections;<br /> using System.Web;<br /> using System.Web.Security;<br /> using System.Web.UI;<br /> using System.Web.UI.WebControls;<br /> using System.Web.UI.WebControls.WebParts;<br /> using System.Web.UI.HtmlControls;<br /> using MyLibrary.BusinessLogicLayer;</span><br /> <span>public partial class Borrow_BorrowBook : System.Web.UI.Page<br /> {<br /> &nbsp; &nbsp; protected void Page_Load(object sender, EventArgs e)<br /> &nbsp; &nbsp; {</span><br /> <span>&nbsp; &nbsp; }<br /> &nbsp; &nbsp; //借阅按钮单击事件<br /> &nbsp; &nbsp; protected void imgBtnBorrow_Click(object sender, ImageClickEventArgs e)<br /> &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; if (Page.IsValid)<br /> &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Borrow borrow = new Borrow();//创建Borrow类对象<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Users user = new Users();//创建Users类对象<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; user.UserID = txtUserID.Text.Trim();//为user对象属性UserID赋值<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; int BorrowNum = 0;<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (user.LoadData(user.UserID))//查询用户并取出用户权限<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; int userPower = user.UserPower;<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (userPower == 3)//学生<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; BorrowNum = 10;//最大借书量10本<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; borrow.BorrowEndDate = Convert.ToDateTime(System.DateTime.Now.AddMonths(1).ToString());//借阅时间</span><br /> <span>为1个月<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; else if (userPower == 4)//教师<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; BorrowNum = 20;//最大借书量20本<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; borrow.BorrowEndDate = Convert.ToDateTime(System.DateTime.Now.AddMonths(3).ToString());//借阅时间</span><br /> <span>为1个月<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; borrow.UserID = txtUserID.Text.Trim();<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; int count = borrow.QueryCurrentBorrowCount(txtUserID.Text.Trim());//查询用户已经借阅图书量<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (count &lt; BorrowNum)//如果还没有超出最大借书量，借书<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; borrow.BookID = int.Parse(txtBookID.Text.Trim());<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; borrow.BorrowBeginDate = Convert.ToDateTime(System.DateTime.Now.ToString());<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; borrow.BorrowState = 0;<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (borrow.InsertByProc())//使用Borrow类InsertByProc方法插入一条借阅记录<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lblMessage.Text = "成功借阅该书！";<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; else<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lblMessage.Text = "借书失败！";<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; else//超出借书量，不能继续借书，给出提示<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lblMessage.Text = "该用户已借满！";<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; else//不存在该用户提示<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lblMessage.Text = "不存在该用户！";<br /> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; &nbsp; &nbsp; }<br /> &nbsp; &nbsp; }<br /> }<br /> </span><br /> <br /> <br />