c# - WPF ComboBox 绑定(bind)到 ObservableCollection

Question

我是 WPF 的新手，我有一个问题。我有组织模块:

class Organization : ObservableObject
{
    public string OrganizationName { get; set; }
}

我有组织的 ViewModel:

class OrganizationViewModel : ObservableObject
{
    int _count = 0;

    public OrganizationViewModel()
    {
        Organization = new Organization {OrganizationName = "New Organization"};
    }

    public Organization Organization { get; set; }

    public string OrganizationName
    {
        get { return Organization.OrganizationName; }
        set
        {
            if(Organization.OrganizationName != value)
            {
                Organization.OrganizationName = value;
                RaisePropertyChanged("OrganizationName");
            }
        }
    }

我有所有组织的 ViewModel:

class AllOrganizationsViewModel
    {
        private ObservableCollection<OrganizationViewModel> m_organizations = new ObservableCollection<OrganizationViewModel>();


    public ObservableCollection<OrganizationViewModel> Organizations
    {
        get { return m_organizations; }
        set { m_organizations = value; }
    }

    public AllOrganizationsViewModel()
    {
        for(int i = 0; i < 3; ++i)
        {
            m_organizations.Add(new OrganizationViewModel());
        }
    }

    void AddOrganizationNameExecute()
    {
        m_organizations.Add(new OrganizationViewModel());
    }

    bool CanAddOrganizationNameExecute()
    {
        return true;
    }

    public ICommand AddOrganization{get{return new RelayCommand(AddOrganizationNameExecute, CanAddOrganizationNameExecute);}}

}

这是 MainWindow.xaml:

<Window x:Class="DataIntegrityChecker.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:DataIntegrityChecker.ViewModels" Title="MainWindow" Height="350" Width="525">
    <Window.DataContext>
        <local:AllOrganizationsViewModel />
    </Window.DataContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="285*" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="156" />
            <ColumnDefinition Width="347*" />
        </Grid.ColumnDefinitions>
        <Label Content="Organization: " Margin="0,0,44,0" />
        <Button Grid.Row="1" Name="UpdateOrganizations" Content="Update Organization Name" Command="{Binding AddOrganization}" Margin="0,0,0,262" HorizontalAlignment="Left" Width="156" />
        <ComboBox Grid.Column="1" Grid.Row="1" Height="23" HorizontalAlignment="Left" Name="comboBox1" VerticalAlignment="Top" Width="155"  ItemsSource="{Binding Organizations}" />
    </Grid>
</Window>

现在，我在 ComboBox 项中得到的是类 OrganizationViewModel 的名称，但我需要的是 OrganizationName 字符串。在我看来，我对缺少的 OrganizationName 有一些绑定(bind)，但我不知道在哪里添加 if(如果这是问题所在)。我假设我可以用我需要的组织的名称制作一个字符串集合。但将来我将需要 Organization Class 中的更多属性，这就是我需要它工作的方式。

我将不胜感激

Answer 1

您需要添加DisplayMemberPath:

<ComboBox Grid.Column="1" Grid.Row="1" Height="23" HorizontalAlignment="Left" Name="comboBox1" VerticalAlignment="Top" Width="155"  ItemsSource="{Binding Organizations}"
          DisplayMemberPath="OrganizationName"/>