private void btnChonBai_Click(object sender, EventArgs e)
{
frmBai f = new frmBai();
f.ShowDialog();
id_chon = f.id_chon;
f.Dispose();
BaiHoc bh = MyFunction.ThongtinBaihoc(id_chon);
if (bh == null)
{
return;
}
baihocTV = bh;
HienThiBaiHoc();
}
private void lstBaihoc_SelectedIndexChanged(object sender, EventArgs e)
{
if (lstBaihoc.SelectedIndices.Count <= 0)
{
return;
}
int intselectedindex = lstBaihoc.SelectedIndices[0];
if (intselectedindex >= 0)
{
String id = lstBaihoc.Items[intselectedindex].SubItems[0].Text;
txtID.Text = id;
BaiHoc bh = MyFunction.ThongtinBaihoc(int.Parse(id));
txtTieude.Text = bh.tieude;
txtNoidung.Text = MyFunction.NoidungToText(bh.baihoc);
txtThutu.Text = bh.thutu.ToString();
}
}
BaiHoc lay_baihoc()
{
if (bai_chon == -1)
{
MyFunction.FromXml_NoiCau();
danhsachNoiCau = MyFunction.danhsachBaihoc;
}
if (danhsachNoiCau.Count == 0)
{
return(null);
}
//Random randomBaihoc = new Random();
//int idx = randomBaihoc.Next(0, danhsachNoiCau.Count);
BaiHoc bai = null;
if (bai_chon == -1)
{
bai = danhsachNoiCau.OrderBy(x => x.thutu).ToList().FirstOrDefault();
}
else
{
bai = MyFunction.danhsachBaihoc.OrderBy(x => x.thutu).ToList().FirstOrDefault(x => x.thutu > bai_chon);
}
if (bai == null)
{
bai_chon = -1;
MessageBox.Show("Hết rồi !!!");
return(null);
}
baihocTV = bai;
bai_chon = bai.thutu;
return(bai);
}
private void btnBaiKe_Click(object sender, EventArgs e)
{
BaiHoc baike = null;
if (baihocTV == null)
{
baike = MyFunction.danhsachBaihoc.OrderBy(x => x.thutu).ToList().FirstOrDefault();
}
else
{
baike = MyFunction.danhsachBaihoc.OrderBy(x => x.thutu).ToList().FirstOrDefault(x => x.thutu > baihocTV.thutu);
}
if (baike == null)
{
MessageBox.Show("Đây là bài cuối !!!");
return;
}
baihocTV = baike;
HienThiBaiHoc();
}
private void btnBaiTruoc_Click(object sender, EventArgs e)
{
BaiHoc bai = null;
if (baihocTV == null)
{
bai = MyFunction.danhsachBaihoc.OrderBy(x => x.thutu).ToList().LastOrDefault();
}
else
{
bai = MyFunction.danhsachBaihoc.OrderBy(x => x.thutu).ToList().LastOrDefault(x => x.thutu < baihocTV.thutu);
}
if (bai == null)
{
MessageBox.Show("Đây là bài đầu tiên !!!");
return;
}
baihocTV = bai;
HienThiBaiHoc();
}
private void btnXoa_Click(object sender, EventArgs e)
{
if (txtID.Text != "")
{
BaiHoc bh = MyFunction.danhsachBaihoc.FirstOrDefault(x => x.Id == int.Parse(txtID.Text));
if (bh != null)
{
try
{
MyFunction.danhsachBaihoc.Remove(bh);
MyFunction.ToXml();
load_listBaihoc();
}
catch (Exception ex)
{
MessageBox.Show("Khong Xoa Duoc");
return;
}
}
}
init_input();
}