Dinamik oluşturma sütunu mvvm

Question

Dinamik nesil sütunlu bir ListView oluşturmaya çalışıyorum. Ben mvvm patern kullanıyorum. Bunu nasıl uygulayabilirim? Bu anemde sadece statik sütunlarım var.

<ListView ItemsSource="{Binding ProblemProducts}" 
        Grid.Row="1" Grid.RowSpan="4" HorizontalAlignment="Left" VerticalAlignment="Top" Grid.Column="4"> 
      <ListView.View> 
       <GridView> 
        <GridViewColumn Header="Spisujący" DisplayMemberBinding="{Binding _spisujacy}" Width="auto"/> 
        <GridViewColumn Header="Miejsce składowania" DisplayMemberBinding="{Binding MiejsceSkladowania}" Width="auto"/> 
        <GridViewColumn Header="Typ spisu" DisplayMemberBinding="{Binding _typSpisu}" Width="auto"/> 
        <GridViewColumn Header="Kod" DisplayMemberBinding="{Binding Kod}" width="auto"/> 
       </GridView> 
      </ListView.View> 
     </ListView> 

Answer 1

Uygun sütunları dinamik dönüştürücü kullanılarak GridView oluşturabilirsiniz. İşte çalışıyor örnek:

MainWindow.xaml

<Window x:Class="WpfApplication1.MainWindow" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     xmlns:WpfApplication1="clr-namespace:WpfApplication1" 
     mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     d:DesignHeight="189" d:DesignWidth="312" Width="300" Height="300"> 
    <Window.Resources> 
     <WpfApplication1:ConfigToDynamicGridViewConverter x:Key="ConfigToDynamicGridViewConverter" /> 
    </Window.Resources> 
    <ListView ItemsSource="{Binding Products}" View="{Binding ColumnConfig, Converter={StaticResource ConfigToDynamicGridViewConverter}}"/>  
</Window> 

MainWindow.xaml.cs

using System.Collections.Generic; 
using System.Windows; 

namespace WpfApplication1 
{ 
    /// <summary> 
    /// Interaction logic for MainWindow.xaml 
    /// </summary> 
    public partial class MainWindow : Window 
    { 
     public MainWindow() 
     { 
      InitializeComponent(); 
      DataContext = new ViewModel(); 
     } 
    } 

    public class ViewModel 
    { 
     public ColumnConfig ColumnConfig { get; set; } 
     public IEnumerable<Product> Products { get; set; } 

     public ViewModel() 
     { 
      Products = new List<Product> { new Product { Name = "Some product", Attributes = "Very cool product" }, new Product { Name = "Other product", Attributes = "Not so cool one" } }; 
      ColumnConfig = new ColumnConfig { Columns = new List<Column> { new Column { Header = "Name", DataField = "Name" }, new Column { Header = "Attributes", DataField = "Attributes" } } }; 
     } 
    } 

    public class ColumnConfig 
    { 
     public IEnumerable<Column> Columns { get; set; } 
    } 

    public class Column 
    { 
     public string Header { get; set; } 
     public string DataField { get; set; } 
    } 

    public class Product 
    { 
     public string Name { get; set; } 
     public string Attributes { get; set; } 
    } 
} 

ConfigToDynamicGridViewConverter.cs

using System; 
using System.Globalization; 
using System.Windows.Controls; 
using System.Windows.Data; 

namespace WpfApplication1 
{ 
    public class ConfigToDynamicGridViewConverter : IValueConverter 
    { 
     public object Convert(object value, Type targetType, object parameter, CultureInfo culture) 
     { 
      var config = value as ColumnConfig; 
      if (config != null) 
      { 
       var grdiView = new GridView(); 
       foreach (var column in config.Columns) 
       { 
        var binding = new Binding(column.DataField); 
        grdiView.Columns.Add(new GridViewColumn {Header = column.Header, DisplayMemberBinding = binding}); 
       } 
       return grdiView; 
      } 
      return Binding.DoNothing; 
     } 

     public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) 
     { 
      throw new NotSupportedException(); 
     } 
    } 
} 

Answer 2

Müthiş bir cevap için teşekkürler Sergei.

Metin olmayan veri türlerine sahip sütunlar eklemem gerektiğinden biraz farklı bir biçimde kullandım.

Bu nedenle, Sergei'nin yanıtındaki aşağıdaki değişiklik, veri değerleri üzerinde ContentControl sarmalayıcıları bulundurmanıza olanak tanır. Daha sonra her bir hücrede bulunan değerler için tanımlanan DataTemplates'e göre işlenecektir. ContentControlDataField TextDataField (aslen DataField) yerine kullanıldığı takdirde

kolon

sarılmış olacaktır:

public class ConfigToDynamicGridViewConverter : IValueConverter { 
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { 
     var config = value as ColumnConfig; 
     if (config != null) { 
      var grdiView = new GridView(); 
      foreach (var column in config.Columns) { 
       bool cc = !string.IsNullOrEmpty(column.ContentControlDataField); 
       var binding = new Binding(cc ? column.ContentControlDataField : column.TextDataField); 
       if (cc) { 
        var template = new DataTemplate(); 
        var fact = new FrameworkElementFactory(typeof(ContentControl)); 
        fact.SetBinding(ContentControl.ContentProperty, binding); 
        template.VisualTree = fact; 
        grdiView.Columns.Add(new GridViewColumn {Header = column.Header, CellTemplate = template}); 
       } else 
        grdiView.Columns.Add(new GridViewColumn {Header = column.Header, DisplayMemberBinding = binding}); 
      } 
      return grdiView; 
     } 
     return Binding.DoNothing; 
    } 

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { 
     throw new NotSupportedException(); 
    } 
} 

public class ColumnConfig { 
    public IEnumerable<Column> Columns { get; set; } 
} 

public class Column { 
    public string Header { get; set; } 
    public string TextDataField { get; set; } 
    public string ContentControlDataField { get; set; } 
}