private void btnOk_Click(object sender, EventArgs e)
{
CashContext cc = new CashContext();
//根据用户的选项，查询用户选择项的相关行
DataRow dr = ((DataRow[])ds.Tables[0].Select("name='" + cbxType.SelectedItem.ToString()+"'"))[0];
//声明一个参数的对象数组
object[] args =null;
//若有参数，则将其分割成字符串数组，用于实例化时所用的参数
if (dr["para"].ToString() != "")
args = dr["para"].ToString().Split(',');
//通过反射实例化出相应的算法对象
cc.setBehavior((CashSuper)Assembly.Load("商场管理软件").CreateInstance("商场管理软件." + dr["class"].ToString(), false, BindingFlags.Default, null, args, null, null));
double totalPrices = 0d;
totalPrices = cc.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 btnOk_Click(object sender, EventArgs e)
{
CashContext cc = new CashContext();
//根据用户的选项，查询用户选择项的相关行
DataRow dr = ((DataRow[])ds.Tables[0].Select("name='" + cbxType.SelectedItem.ToString() + "'"))[0];
//声明一个参数的对象数组
object[] args = null;
//若有参数，则将其分割成字符串数组，用于实例化时所用的参数
if (dr["para"].ToString() != "")
{
args = dr["para"].ToString().Split(',');
}
//通过反射实例化出相应的算法对象
cc.setBehavior((CashSuper)Assembly.Load("商场管理软件").CreateInstance("商场管理软件." + dr["class"].ToString(), false, BindingFlags.Default, null, args, null, null));
double totalPrices = 0d;
totalPrices = cc.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();
}
