在WPF中绑定模型的通用属性

Question

I have a wpf usercontrol which has binding to a model(CustomerTaxModel) and it has a listview and GridView which should display data of property of type "T" Assets below. This type T is a class with only properties and it has variable number of properties depending on the data we receive from third party tax verification company.

public class CustomerTaxModel

{

    public int ID { get; set; }

    public string Name { get; set; }

    public T Assets { get; set; }


}

My Generic type "T" classes looks like below. They may not have matching properties. I should display data of this type T with property names in one column and their values in second column. Is that possible to do this type of binding in xaml ? The type T takes CorporateAsset , AgricultureReturns etc..

public class CorporateAsset
{        

    public string CorporateOfficeName { get; set; }

    public string NetWorth { get; set; }

    public string Subsidized { get; set; }

    public string LaunchDate{ get; set; }

}


 public class AgricultureReturns

{

    public string Name { get; set; }

    public string FieldSizeinAcres { get; set; }

    public string CropType { get; set; }

    public int NoOfSeasons { get; set; }

}

One solution I tried was binding to a KeyValuePair variable instead of binding the type "T" directly which works. .I referred the link and I tried with static property class in place of type T and it shows the data dynamically but when property itself is generic how can we display its properties in grid view.

<UserControl x:Class="WpfApplication1.UserControl"
    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">
<UserControl.Resources>
    <WpfApplication1:ConfigToDynamicGridViewConverter x:Key="ConfigToDynamicGridViewConverter" />
</UserControl.Resources>
<ListView ItemsSource="{Binding DataClass}" View="{Binding ColumnConfig, Converter={StaticResource ConfigToDynamicGridViewConverter}}"/>    

Answer 1

Binding.Path works by reflection. It can look up any public instance property the actual runtime object has. This is how the DataContext property of WPF controls can be of type Object . Your Assets property could be object as well as far as WPF is concerned, but there's no reason to forgo strong typing in your models. WPF eats anything.

This gives me a TextBlock that says "Fred":

public MainWindow()
{
    InitializeComponent();

    DataContext = new CustomerTaxModel<AgricultureReturns>()
    {
        Assets = new AgricultureReturns() { Name = "Fred" }
    };

}

XAML:

<TextBlock Text="{Binding Assets.Name}" />

If you've got an ObservableCollection of CustomerTaxModel , a common pattern is to have a bunch of DataTemplates for the different types that Assets might be. These are pretty lame templates, but you get the idea.

<ItemsControl ItemsSource="{Binding TaxModels}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Name}" />
                <!-- DataTemplates in Resources will be used here automagically -->
                <ContentControl Content="{Binding Assets}" />
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>

    <ItemsControl.Resources>
        <DataTemplate TargetType="{x:Type models:AgricultureReturns}">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Name}" />
                <TextBlock Text="{Binding FieldSizeinAcres}" />
                <!-- etc -->
            </StackPanel>
        </DataTemplate>

        <DataTemplate TargetType="{x:Type models:CorporateAsset}">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding CorporateOfficeName}" />
                <TextBlock Text="{Binding NetWorth}" />
                <!-- etc -->
            </StackPanel>
        </DataTemplate>
    </ItemsControl.Resources>
</ItemsControl>