public bool IsExist(int masv)
{
for (int i = 0; i < listSV.Count;i++ )
{
Sinh_Vien sv = new Sinh_Vien();
sv = (Sinh_Vien)listSV[i];
if(sv.getMaSV()==masv)
{
return true;///ma sinh vien da ton tai
}
}
return false;//ma sinh vien chua ton tai
}
public void ShowSearch(ArrayList list)
{
listView1.Items.Clear();
ArrayList dulieu = list;
for (int i = 0; i < dulieu.Count; i++)
{
sv = (Sinh_Vien)dulieu[i];
ListViewItem item = new ListViewItem(sv.getMaSV().ToString());
item.SubItems.Add(sv.getHoten());
item.SubItems.Add(sv.getDiem().ToString());
listView1.Items.Add(item);
listView1.View = View.Details;
}
}
//public void hienThiList()
//{
// for (int i = 0; i < listSV.Count; i++)
// {
// Sinh_Vien sv = new Sinh_Vien();
// sv = (Sinh_Vien)listSV[i];
// }
//}
//public void readFile()
//{
// Stream s = File.OpenRead("node.txt");
// StreamReader st = new StreamReader(s);
// string str = st.ReadLine();
//}
public void luuDL()
{
StreamWriter sw = new StreamWriter("Du lieu.txt");
int i;
for (i = 0; i < listSV.Count; i++)
{
Sinh_Vien sv = new Sinh_Vien();
sv = (Sinh_Vien)listSV[i];//ép mỗi phần tử của arraylist về kiểu sinh viên
sw.WriteLine(sv.getMaSV() + " " + sv.getHoten() + " " + sv.getDiem());
}
sw.Flush();
sw.Close();
sw.Dispose();
}
public void search(int index)
{
Sinh_Vien sv = new Sinh_Vien(0,"",0);
if (txtmasv.Text!="")
{
sv.setMaSV(int.Parse(txtmasv.Text.Trim()));
}
sv.setHoten(txttensv.Text.Trim());
if (txtdiem.Text.Trim()!="")
{
sv.setDiem(int.Parse(txtdiem.Text.Trim()));
}
ArrayList list = DL.searchDL(sv, index);//lay ket qua tim kiem dc
ShowSearch(list);//show len giao dien
}
public void loadData()
{
listView1.Items.Clear();
//string mang = sv.getMaSV() + " " + sv.getHoten() + " " + sv.getDiem();
ArrayList dulieu = DL.getDSSinhVienFromFile();
for (int i = 0; i < dulieu.Count;i++ )
{
sv = (Sinh_Vien)dulieu[i];
// string[] arrayStr = mang.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
ListViewItem item = new ListViewItem(sv.getMaSV().ToString());
//item.SubItems.Add(sv.getMaSV().ToString());
item.SubItems.Add(sv.getHoten());
item.SubItems.Add(sv.getDiem().ToString());
listView1.Items.Add(item);
listView1.View = View.Details;
}
}
public ArrayList getDSSinhVienFromFile()
{
listSV.Clear();
StreamReader line = new StreamReader("Du lieu.txt");
while (!line.EndOfStream)
{
string docline = line.ReadLine();
String[] cat = docline.Split(' ');
// listSV.Add(cat[0] + "" + cat[1] + "" + cat[2]);
Sinh_Vien sv = new Sinh_Vien();//tao 1 sinh vien
sv.setMaSV(int.Parse(cat[0]));//dua thong tin tung dong doc duoc vao sinh vien nay
sv.setHoten(cat[1].Trim());
sv.setDiem(int.Parse(cat[2]));
//listSV.Clear();
listSV.Add(sv);//dua sinh vien vao danh sach
}
line.Close();
return listSV;// tra ve danh sach sinh vien
}
private void btnsua_Click(object sender, EventArgs e)
{
// if (listView1.SelectedItems.Count == 0)
// {
// MessageBox.Show("Chọn hàng cần sữa ");
// }
// else
// {
// foreach (ListViewItem item in listView1.SelectedItems)
// {
// DL.suaDL(tensv, maSV);
// xoaText();
// }
Sinh_Vien sv_ = new Sinh_Vien();
sv_.setMaSV(int.Parse(txtmasv.Text.Trim()));
sv_.setHoten(txttensv.Text.Trim());
sv_.setDiem(int.Parse(txtdiem.Text.Trim()));
DL.suaDL(sv_);
DL.luuDL();
loadData();
// }
}
public ArrayList searchDL(Sinh_Vien sv_,int index)
{
// for (int i=0; i < listSV.Count;i++ )
// {
// Sinh_Vien sv = new Sinh_Vien();
// sv = (Sinh_Vien)listSV[i];
switch(index)
{
case 0:
SearchSV(sv_.getMaSV());//masv
break;
case 1:
SearchSV(sv_.getHoten());//ho ten
break;
case 2:
SearchSV(sv_.getMaSV(),sv_.getHoten());//ho ten va maSV
break;
default:
SearchSV(sv_.getMaSV());//masv
break;
}
// if (sv.getMaSV() == sv_.getMaSV()&&sv.getHoten()==sv_.getHoten())
// {
//
// }
return listSearch;
}
public void hienthiSV(Sinh_Vien sv)
{
StreamWriter sw = new StreamWriter("Du lieu.txt");
sw.WriteLine(sv.getMaSV() + " " + sv.getHoten() + " " + sv.getDiem());
}
public void xoaDL(int masv)
{
for (int i= 0; i < listSV.Count; i++)
{
Sinh_Vien sv = new Sinh_Vien();
sv = (Sinh_Vien)listSV[i];
if (sv.getMaSV().ToString() == masv.ToString())
{
listSV.RemoveAt(i);
}
//listSV.RemoveAt(i);
}
}
// int i;
// ArrayList Items=new ArrayList();
public void timDL(int masv)
{
for (int i = 0; i < listSV.Count; i++)
{
Sinh_Vien sv = new Sinh_Vien();
sv = (Sinh_Vien)listSV[i];
if (sv.getMaSV() == masv)
{
hienthiSV(sv);
break;
}
}
}
public void themDL(int masv, string ten, int diem)
{
Sinh_Vien SV_=new Sinh_Vien();
SV_.setMaSV(masv);
SV_.setHoten(ten);
SV_.setDiem(diem);
listSV.Add(SV_);
}
public void suaDL(Sinh_Vien sv_)
{
for (int i=0; i < listSV.Count;i++ )
{
Sinh_Vien sv = new Sinh_Vien();
sv = (Sinh_Vien)listSV[i];
if (sv.getMaSV() == sv_.getMaSV())
{
listSV[i] = sv_;
}
}
}
public ArrayList SearchSV(int masv,string strHoten)
{
listSearch.Clear();
for (int i = 0; i < listSV.Count; i++)
{
Sinh_Vien sv = new Sinh_Vien();
sv = (Sinh_Vien)listSV[i];
if (sv.getMaSV() == masv&&sv.getHoten()==strHoten)
{
listSearch.Add(sv);
}
}
return listSearch;
}