private void btnOk_Click(object sender, EventArgs e)
{
double totalPrices = 0d;
CashContext csuper = new CashContext(cbxType.SelectedItem.ToString());
totalPrices = csuper.GetResult(Convert.ToDouble(txtPrice.Text)
* Convert.ToDouble(txtNum.Text));
total = total + totalPrices;
lbxList.Items.Add("单价：" + txtPrice.Text + "数量：" + txtNum.Text +
" " + cbxType.SelectedItem + " 合计：" + totalPrices.ToString());
lblResult.Text = total.ToString();
}
private void receipt_Click(object sender, EventArgs e)
{
double totalPrice = 0d;
/* 使用简单工厂模式实现
* Cash cash = CashFactory.createCash(way.SelectedItem.ToString());
* totalPrice = cash.receipt(Convert.ToDouble(pricebox.Text) * Convert.ToDouble(numbox.Text));
* total += totalPrice;
*/
/* 使用策略模式实现
* string strway = way.SelectedItem.ToString();
* CashContext cashcontext = new CashContext(strway);
* totalPrice = cashcontext.getReceipt(Convert.ToDouble(pricebox.Text) * Convert.ToDouble(numbox.Text));
* total += totalPrice;
* recordlist.Items.Add("单价：" + pricebox.Text +
* "数量" + numbox.Text + " " + way.SelectedItem + "合计:" + totalPrice.ToString());
* sum.Text = total.ToString();
*/
//使用反射机制结合策略模式
CashContext cashcontext = new CashContext();
DataRow dr = ((DataRow[])xmlConfig.Tables[0].Select("name='" + way.SelectedItem.ToString() + "'"))[0];
//声明一个参数的对象数组
object[] args = null;
if (dr["para"].ToString() != "")
{
args = dr["para"].ToString().Split(',');
}
cashcontext.CashImp = (Cash)Assembly.Load("CashRegister").CreateInstance(
"CashRegister.strategy." + dr["class"].ToString(), false,
BindingFlags.Default, null, args, null, null
);
totalPrice = cashcontext.getReceipt(Convert.ToDouble(pricebox.Text) * Convert.ToDouble(numbox.Text));
total += totalPrice;
recordlist.Items.Add("单价：" + pricebox.Text +
"数量" + numbox.Text + " " + way.SelectedItem + "合计:" + totalPrice.ToString());
sum.Text = total.ToString();
}
static void Main(string[] args)
{
Console.Write("//策略模式\n");
string output = "";
double Price = 350.0d;
double Number = 10.0d;
double totalPrice = 0.0d;
//CashContext csuper = new CashContext("正常收費");
//CashContext csuper = new CashContext("滿300送100");
CashContext csuper = null;
Console.Write("#1 正常收費\n");
csuper = new CashContext("正常收費");
totalPrice = csuper.GetResult(Price * Number);
total += totalPrice;
output = string.Format("Unit Price:{0:###.###}\nQuantity:{1:###}\nSum:{2:###.###}\n\n", Price, Number, total);
Console.Write(output);
Console.Write("#2 打八折\n");
csuper = new CashContext("打八折");
total = 0.0d;
totalPrice = csuper.GetResult(Price * Number);
total += totalPrice;
output = string.Format("Unit Price:{0:###.###}\nQuantity:{1:###}\nSum:{2:###.###}\n\n", Price, Number, total);
Console.Write(output);
Console.Write("#3 滿300送100\n");
csuper = new CashContext("滿300送100");
total = 0.0d;
totalPrice = csuper.GetResult(Price * Number);
total += totalPrice;
output = string.Format("Unit Price:{0:###.###}\nQuantity:{1:###}\nSum:{2:###.###}\n", Price, Number, total);
Console.Write(output);
Console.Read();
}
