WPF Application master detail

Markus Freitag 3,786

Hello together,

I want to add a order number, then add a material number with quantity.

Master, Detail with C#

OrderNumber = ………

Fill the list OrderNumbers

On right site I need a MaterialList

Input: Material = …….. Quantity = ……

     Add, Edit, Delete Button

Fille the list with MaterialNumbers and Quantity

Save it as XML.

Should be possible to reload it.

I'm looking for a good sample code.

Thanks in advance for your help!

Regards Markus

11 answers

DaisyTian-1203 11,621

I will give you two ways to generate OrderNumbers automatically.
Method1:

private void MyDataGrid_LoadingRow(object sender, DataGridRowEventArgs e)
        {
            e.Row.Header = (e.Row.GetIndex() + 1).ToString();
        }

Method2:

 <Window.Resources>
        <ResourceDictionary>
            <local:RowToIndexConverter x:Key="rowToIndexConverter"/>
        </ResourceDictionary>
    </Window.Resources>

<DataGridTextColumn Header="OrderNumbers " Binding="{Binding RelativeSource={RelativeSource AncestorType=DataGridRow}, Converter={StaticResource rowToIndexConverter}}" />

The converter is:

public class RowToIndexConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            DataGridRow row = value as DataGridRow;
            if (row != null)
                return row.GetIndex() + 1;
            else
                return -1;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

Markus Freitag 3,786 Reputation points

2020-07-09T08:17:36.117+00:00

Thanks for the quick response.
I have a TextBox enter the new number Like 20200709-Cust7654.

The add button should fill the listbox.

For material, I need two columns, like grid.
Can you post more details?
Thanks.

Best regards Markus
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DaisyTian-1203 11,621 Reputation points

2020-07-09T08:36:22.173+00:00

Here is my sample.
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Markus Freitag 3,786 Reputation points

2020-07-09T08:46:16.037+00:00

Thanks, looks good, but not perfect.

I need a own list for orders.
A detail list for material and quantity and comment.

Primary Key. Foreign Key.
Save as XML.

If I edit, _showCellseditingTemplate null exception.

Can you help again, pleased?

Thanks.
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DaisyTian-1203 11,621 Reputation points

2020-07-09T08:49:23.8+00:00

Can you show me your requirements in the diagram? That will make it easier for me to understand. By the way, are you using MVVM?
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Markus Freitag 3,786 Reputation points

2020-07-09T09:08:34.383+00:00

Yes I need MVVM.

I enter the order number. For each order numbers I can use different materials.
I need a textbox for material and for quantity, and yes for comment, why not.
A ADD button for fill the list, a button to delete whe whole list and for each row a button to delete a special item as you do it.

Thanks for help.
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Markus Freitag 3,786

A SAVE button to save it as XML file.
A LOAD button to reload it inside the view.

The name of the file is OrderNumber.XML

If a order is selected, the SAVE button is enable and I can exactly save this order with the right material list.

Relation is Order 1:n Material

Hope now clear what I need.

MVVM I need, yes. Is not all clear for how it is work. I need a good model.

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)

        ICommand handler

Peter Fleischer (former MVP) 19,321

Hi Markus, try this

public class ViewModel : INotifyPropertyChanged
  {


    #region PropertyChanged
    public event PropertyChangedEventHandler PropertyChanged;
    internal void OnPropertyChanged([CallerMemberName] string propName = "") =>
     PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propName));
    #endregion
  }

Peter Fleischer (former MVP) 19,321

Load in ViewModel:

private string filePath = @"c:\temp\x.xml";
private CollectionViewSource cvs1 = new CollectionViewSource();
public ICollectionView View1 { get => cvs1.View; }
private CollectionViewSource cvs2 = new CollectionViewSource();
public ICollectionView View2 { get => cvs2.View; }   public ICommand Cmd { get => new RelayCommand(CmdExec); }
private void CmdExec(object obj)
{
  switch (obj.ToString())
  {
    case "Load":
      if (!File.Exists(filePath)) cvs1.Source = new ObservableCollection<Order>();
      else using (FileStream fs = new FileStream(filePath, FileMode.Open))
          cvs1.Source = (new XmlSerializer(typeof(ObservableCollection<Order>))).Deserialize(fs);
      SetSourceToView2();
      cvs1.View.CurrentChanged += (sender, e) => SetSourceToView2();
      OnPropertyChanged(nameof(View1));
      break;
    case "Save":

Peter Fleischer (former MVP) 19,321

Save in ViewModel:

    case "Save":
      XmlSerializer serializer = new XmlSerializer(typeof(ObservableCollection<Order>));
      using (TextWriter writer = new StreamWriter(filePath))
        (new XmlSerializer(typeof(ObservableCollection<Order>))).Serialize(writer, cvs1.Source);
      break;
    default:
      break;
  }
}

private void SetSourceToView2()
{
  var orderItem = cvs1.View.CurrentItem as Order;
  cvs2.Source = (orderItem == null) ? null : orderItem.Materials;
  OnPropertyChanged(nameof(View2));
}

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WPF Application master detail

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