Question

我正在尝试使用SQL db创建一个WPF来跟踪我的订单。

我有5个TextBoxes * 10行（总共50行）产品项目（名为pur_Items1至10）价格（以pur_Price1到10命名）折扣（命名为pur_Discount1到10） ShippingCost（命名为pur_Shipping1到10）和总项目成本（命名为pur_Total1到10）

不写下60行以下丑陋代码的最佳做法是什么？

double i1 = Convert.ToDouble(pur_Items1.Text);
double p1 = Convert.ToDouble(pur_Price1.Text);
double d1 = Convert.ToDouble(pur_Discount1.Text);
double s1 = Convert.ToDouble(pur_Shipping1.Text);
double t1 = Math.Round(((i1 * p1) - d1) + s1,2);
pur_Total1.Text = Convert.ToString(t1.Text);

我有几个方法，但悲惨地失败

提前谢谢。

Answer 1

您应该使用DataGrid来显示动态表格数据。

以下是一个例子：

XAML：

<Window>
  <StackPanel>
    <Button Content="Submit" HorizontalAlignment="Center" Click="btnSubmit_Click" />
    <DataGrid Name="dg"/>
  </StackPanel>
</Window>

代码背后：

public partial class MainWindow : Window
{
  public MainWindow()
  {
    InitializeComponent();
    dg.ItemsSource = Products;
  }

  readonly ObservableCollection<Product> Products = new ObservableCollection<Product>();

  private void btnSubmit_Click(object sender, RoutedEventArgs e) 
  {
    foreach(var product in Products)
    {
      //Save product to database
    }
    Products.Clear();
  }

public class Product : INotifyPropertyChanged
{
  string _Item;
  public string Item
  {
    get => _Item;
    set
    {
      _Item = value;
      RaisePropertyChanged();
    }
  }


  decimal _Price;
  public decimal Price
  {
    get => _Price;
    set
    {
      _Price = value;
      RaisePropertyChanged();
      RaiseCostChanged();
    }
  }

  decimal _Discount;
  public decimal Discount
  {
    get => _Discount;
    set
    {
      _Discount = value;
      RaisePropertyChanged();
      RaiseCostChanged();
    }
  }

  decimal _ShippingCost;
  public decimal ShippingCost
  {
    get => _ShippingCost;
    set
    {
      _ShippingCost = value;
      RaisePropertyChanged();
      RaiseCostChanged();
    }
  }

  public decimal Cost => Price + ShippingCost - Discount;


  public event PropertyChangedEventHandler PropertyChanged;
  protected void RaisePropertyChanged([CallerMemberName]string propertyName = null) =>
    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
  protected void RaiseCostChanged() => RaisePropertyChanged(nameof(Cost));
}

C＃多行文本框操作

1 个答案: