private void 帮助ToolStripMenuItem_Click(object sender, EventArgs e)
{
uint size = FileDate.CountOf <Record>();
for (int i = 0; i < size; i++)
{
FileDate.ReadOne <Record>(i).debug();
}
}
private List <BookMaster> SearchByKeyword(Book book)
{
List <BookMaster> bklist = new List <BookMaster>();
BookMaster master = new BookMaster();
uint size = FileDate.CountOf <BookMaster>();
for (int i = 0; i < size; i++)
{
master = FileDate.ReadOne <BookMaster>(i);
if (master.SimiliarTo(book))
{
bklist.Add(master);
}
}
return(bklist);
}
private void confirm_Click(object sender, EventArgs e)
{
if (Vis.Checked)
{
Main.user = new User("Visitor");
qual = true;
}
else if (!(Stu.Checked || Worker.Checked || Admin.Checked))
{
MessageBox.Show("请选择你的登录身份！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
else
{
User utemp = new User();
uint size = FileDate.CountOf <User>();
for (int i = 0; i < size; i++)
{
utemp = FileDate.ReadOne <User>(i);
if (utemp.ID == IDtxt.Text && utemp.Pwd == PWDtxt.Text)
{
if ((Stu.Checked && utemp.Pri == Privilege.学生) ||
(Worker.Checked && utemp.Pri == Privilege.职工) ||
(Admin.Checked && utemp.Pri == Privilege.管理员))
{
qual = true;
Main.user = new User(utemp);
main.updateStatus();
break;
}
}
}
}
if (qual)
{
this.Close();
}
else
{
MessageBox.Show("未找到用户信息，用户名或密码或者登录身份错误.", "登录失败", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
//通过ISBN来找到书籍（书籍ISBN是唯一的，可以当做一个标识）
public static List <BookMaster> SearchByISBN(string isbn)
{
BookMaster master = new BookMaster();
uint count = FileDate.CountOf <BookMaster>();
List <BookMaster> bklist = new List <BookMaster>(1);
for (int i = 0; i < count; i++)
{
master = FileDate.ReadOne <BookMaster>(i);
if (master.Info.ISBN.Contains(isbn))
{
bklist.Add(master);
break;
}
}
if (bklist.Count == 0)
{
MessageBox.Show("未找到该ISBN编号的书", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
return(bklist);
}
private List <Record> RecordWithinSpan(int span)
{
List <Record> reclist = new List <Record>();
int len = (int)FileDate.CountOf <Record>();
int size = Marshal.SizeOf(typeof(Record));
Record rec = new Record();
for (int i = 1; i <= len; i++)
{
rec = FileDate.ReadOne <Record>(len - i);
if (rec.spanDaysToPresent() <= span)
{
reclist.Add(rec);
}
else
{
break;
}
}
return(reclist);
}
//删除对象（相当于将对象变为默认值）
public static void Delete <T>(T t) where T : IGet, new()
{
int structsize = Marshal.SizeOf(typeof(T));
uint count = FileDate.CountOf <T>();
using (FileStream fs = new FileStream(t.ToString() + ".dat", FileMode.Open))
{
using (BinaryReader br = new BinaryReader(fs))
{
for (uint i = 0; i < count; i++)
{
if (Byte2Struct <T>(br.ReadBytes(structsize)).GetID() == t.GetID())
{
using (BinaryWriter bw = new BinaryWriter(fs))
{
fs.Position -= structsize;
bw.Write(Struct2Byte <T>(new T()));
}
return;
}
}
}
}
}