protected void btnDelete_Click(object sender, EventArgs e)
        {
            bolbt = new Bol_BusType();
            bt    = new BusType();
            if (txtDelete.Text == "")
            {
                Response.Write("Nhap ten hay id can xoa !!!");
                txtDelete.Focus();
            }
            else
            {
                if (DropDownList3.SelectedValue.ToString() == "ByID")
                {
                    if (bolbt.CheckBusTypeExistByID(Convert.ToInt32(txtDelete.Text)) == 1)
                    {
                        bt.BT_ID             = Convert.ToInt32(txtDelete.Text);
                        GridView1.DataSource = bolbt.DeleteBusTypeByID(bt);
                        GridView1.DataBind();
                    }
                    else
                    {
                        Response.Write("ID nay khong ton tai !!!");
                        txtName.Focus();
                    }
                }

                else if (DropDownList3.SelectedValue.ToString() == "ByName")
                {
                    if (bolbt.CheckBusTypeExistByID(Convert.ToInt32(txtDelete.Text)) == 1)
                    {
                        bt.Name = txtDelete.Text;
                        GridView1.DataSource = bolbt.DeleteBusTypeByName(bt);
                        GridView1.DataBind();
                    }
                    else
                    {
                        Response.Write("Name nay khong ton tai !!!");
                        txtName.Focus();
                    }
                }
            }
        }
 protected void btnSearch_Click(object sender, EventArgs e)
 {
     bt    = new BusType();
     bolbt = new Bol_BusType();
     if (txtSearch.Text == "")
     {
         Response.Write("Vui long nhap tu khoa muon tim !!!");
         txtSearch.Focus();
     }
     else
     {
         if (DropDownList1.SelectedValue.ToString() == "ByID")
         {
             if (bolbt.CheckBusTypeExistByID(Convert.ToInt32(txtSearch.Text)) == 1)
             {
                 bt.BT_ID             = Convert.ToInt32(txtSearch.Text);
                 GridView1.DataSource = bolbt.SelectBusTypeByID(bt);
                 GridView1.DataBind();
             }
             else
             {
                 Response.Write("ID nay khong ton tai !!!");
                 txtSearch.Focus();
             }
         }
         else if (DropDownList1.SelectedValue.ToString() == "ByName")
         {
             if (bolbt.CheckBusTypeExistByName(txtSearch.Text) == 1)
             {
                 bt.Name = txtSearch.Text;
                 GridView1.DataSource = bolbt.SelectBusTypeByName(bt);
                 GridView1.DataBind();
             }
             else
             {
                 Response.Write("Name nay khong ton tai !!!");
                 txtSearch.Focus();
             }
         }
     }
 }
 protected void btnUpdate_Click(object sender, EventArgs e)
 {
     bt    = new BusType();
     bolbt = new Bol_BusType();
     if (txtID.Text == "")
     {
         Response.Write("Vui long nhap ten !!!");
         txtID.Focus();
     }
     else
     {
         if (DropDownList2.SelectedValue.ToString() == "ByID")
         {
             if (bolbt.CheckBusTypeExistByID(Convert.ToInt32(txtID.Text)) == 1)
             {
                 if (txtName.Text == "")
                 {
                     Response.Write("Vui long nhap thong tin update !!!");
                     txtName.Focus();
                 }
                 else if (txtDescription.Text == "")
                 {
                     Response.Write("Vui long nhap thong tin update !!!");
                     txtDescription.Focus();
                 }
                 else if (txtPrice.Text == "")
                 {
                     Response.Write("Vui long nhap thong tin update !!!");
                     txtPrice.Focus();
                 }
                 else if (txtID.Text == "")
                 {
                     Response.Write("Vui long nhap thong tin update !!!");
                     txtID.Focus();
                 }
                 else
                 {
                     bt.BT_ID       = Convert.ToInt32(txtID.Text);
                     bt.Name        = txtName.Text;
                     bt.Description = txtDescription.Text;
                     bt.Price       = Convert.ToDouble(txtPrice.Text);
                     if (RadioButton3.Checked)
                     {
                         bt.Status = true;
                     }
                     else if (RadioButton4.Checked)
                     {
                         bt.Status = false;
                     }
                     try
                     {
                         GridView1.DataSource = bolbt.UpdateBusTypeByID(bt);
                         GridView1.DataBind();
                     }
                     catch (Exception ex)
                     {
                         Response.Write(ex.Message + "SAO LAI THE NHI !!!");
                     }
                 }
             }
             else
             {
                 Response.Write("ID nay khong ton tai !!!");
                 txtID.Focus();
             }
         }
         else if (DropDownList2.SelectedValue.ToString() == "ByName")
         {
             if (bolbt.CheckBusTypeExistByName(txtID.Text) == 1)
             {
                 bt.Name        = txtName.Text;
                 bt.Description = txtDescription.Text;
                 bt.Price       = Convert.ToDouble(txtPrice.Text);
                 if (RadioButton3.Checked)
                 {
                     bt.Status = true;
                 }
                 else if (RadioButton4.Checked)
                 {
                     bt.Status = false;
                 }
                 try
                 {
                     GridView1.DataSource = bolbt.UpdateBusTypeByName(bt);
                     GridView1.DataBind();
                 }
                 catch (Exception ex)
                 {
                     Response.Write(ex.Message + "CHAN CHUA KIA !!!");
                 }
             }
             else
             {
                 Response.Write("Name nay khong ton tai !!!");
                 txtName.Focus();
             }
         }
     }
 }