public loaisach LayDuLieuTuForm()
{
loaisach ls = new loaisach()
{
MaLoai = txtMaLoaiSach.Text,
TenLoaiSach = txtTenLoaiSach.Text
};
return(ls);
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
string maLoai = GridView1.SelectedRow.Cells[0].Text;
ls = cn.GetLoaiSachByID(maLoai);
if (ls != null)
{
txtMaLoaiSach.Text = ls.MaLoai;
txtTenLoaiSach.Text = ls.TenLoaiSach;
}
}
public bool UpdateLoaiSach(loaisach ls)
{
using (SqlConnection conn = new SqlConnection(connect))
{
string sql = "update LoaiSach set TenLoaiSach=@ten where MaLoai=@ma";
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@ma", ls.MaLoai);
cmd.Parameters.AddWithValue("@ten", ls.TenLoaiSach);
conn.Open();
int count = (int)cmd.ExecuteNonQuery();
return(count >= 1);
}
}
public bool InsertLoaiSach(loaisach ls)
{
using (SqlConnection conn = new SqlConnection(connect))
{
string sql = "insert into LoaiSach values(@ma,@ten)";
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@ma", ls.MaLoai);
cmd.Parameters.AddWithValue("@ten", ls.TenLoaiSach);
conn.Open();
int count = (int)cmd.ExecuteNonQuery();
return(count >= 1);
}
}
protected void btnSua_Click(object sender, EventArgs e)
{
ls = LayDuLieuTuForm();
bool result = cn.UpdateLoaiSach(ls);
if (result)
{
lblThongBao.Text = "Cập nhập thành công";
DoDuLieuVaoGridView();
}
else
{
lblThongBao.Text = "Có lỗi";
}
}
public loaisach GetLoaiSachByID(string maLoai)
{
using (SqlConnection conn = new SqlConnection(connect))
{
string sql = "select * from LoaiSach where MaLoai=@ma";
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@ma", maLoai);
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
if (dr.Read())
{
loaisach ls = new loaisach()
{
MaLoai = (string)dr["MaLoai"],
TenLoaiSach = (string)dr["TenLoaiSach"]
};
return(ls);
}
return(null);
}
}
protected void btnThem_Click(object sender, EventArgs e)
{
ls = LayDuLieuTuForm();
cn = new chucnang();
bool exist = cn.CheckMaLoaiSach(ls.MaLoai);
if (exist)
{
lblThongBao.Text = "Tác Giả này đã có";
}
else
{
bool result = cn.InsertLoaiSach(ls);
if (result)
{
lblThongBao.Text = "Thêm thành công";
DoDuLieuVaoGridView();
}
else
{
lblThongBao.Text = "Có lỗi";
}
}
}
