将自定义对象绑定到WPF组合框

问题描述：

我有一个组合框，其中的项源类型为 ObservableCollection< Clinic>

I have a combobox that has an items source of type ObservableCollection<Clinic>

<ComboBox ItemsSource="{Binding Source={StaticResource ClinicList}}" DisplayMemberPath="Name" SelectedValue="{Binding Path=Name}" SelectedValuePath="Name"></ComboBox>

此组合框位于由EmployeeClinics绑定的ListView中。

This combobox is within a ListView that is bound from EmployeeClinics.

public class Employee{
   public ObservableCollection<Clinic> EmployeeClinics { get; set; }
}

启动应用程序时，我会看到适当的诊所。下拉菜单似乎显示了正确的选项，但是当我更新它们时，仅名称更新，而不更新ClinicId（保留以前的ClinicId）。

When I launch the app I see the appropriate clinics. And the drop down seems to show the correct options, but when I update them, only the Name updates and not the ClinicId (it keeps previous ClinicId).

编辑：同样，当我将新诊所添加到列表中并从选项中选择它时，当我查看以下内容时，其ID为0采集。

Similarly when I add a new clinic to the list and select it from the options, it's Id is 0 when I look at the collection.

这是我的诊所模型。

public class Clinic {
        public int ClinicId { get; set; }
        public string _name { get; set; }
        public string Name {
            get {

            return _name;}
            set {
                if (_name != value) {
                    _name = value;
                }
            }
        }
}

更新：：谢谢@AyyappanSubramanian。我正在取得进展。我已经更新了我的对象

UPDATE: Thanks @AyyappanSubramanian. I am making headway. I have updated my Objects

public class Employee{
    public ObservableCollection<ClinicView> EmployeeClinics { get; set; }
}


public class ClinicView {

    private Clinic selectedClinic;
    public Clinic SelectedClinic {
        get { return selectedClinic; }
        set {
            selectedClinic = value;
            selectedClinicId = selectedClinic.ClinicId;
        }
    }

    private int selectedClinicId;
    public int SelectedClinicId {
        get { return selectedClinicId; }
    }
}

XAML：

<ComboBox ItemsSource="{Binding Source={StaticResource ClinicList}}" DisplayMemberPath="Name" SelectedItem="{Binding SelectedClinic}"></ComboBox>

更改下拉列表现在可以正确更改基础对象并根据需要更新列表。现在我唯一的问题是组合框不显示当前对象，只是在开始时显示为空白。我碰到了SelectedValue和Path，没有运气。有任何建议吗？

Changing the drop downs now properly changes the underlying object and updates the list as desired. Now my only issue is that the comboboxes don't display the current object, just show as blank on start. I've messed around with SelectedValue and Path with no luck. Any suggestions?

答

请参考以下代码。您可以使用SelectedItem在一个SelectedObject中获取ID和名称。使用SelectedValue仅获取ID。

Refer the below code. You can use SelectedItem to get both the ID and Name in one SelectedObject. Get only ID using SelectedValue.

 <ComboBox ItemsSource="{Binding Clinics}" DisplayMemberPath="ClinicName"
              SelectedValuePath="ClinicId" SelectedValue="{Binding SelectedClinicId}"                 
              SelectedItem="{Binding SelectedClinic}"/>


 public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = new ViewModel();
    }        
}

class Clinic
{
    public int ClinicId { get; set; }
    public string ClinicName { get; set; }
}

class ViewModel
{
    public ObservableCollection<Clinic> Clinics { get; set; }
    public ViewModel()
    {
        Clinics = new ObservableCollection<Clinic>();
        for (int i = 0; i < 10; i++)
        {
            Clinics.Add(new Clinic() { ClinicId=i+1,ClinicName="MyClinic"+(i+1) });
        }
    }

    private int selectedClinicId;

    public int SelectedClinicId
    {
        get { return selectedClinicId; }
        set 
        { 
            selectedClinicId = value;
        }
    }


    private Clinic selectedClinic;

    public Clinic SelectedClinic
    {
        get { return selectedClinic; }
        set 
        { 
            selectedClinic = value;
            MessageBox.Show("ID:"+selectedClinic.ClinicId.ToString()+" "+"Name:"+selectedClinic.ClinicName);
        }
    }

}

将自定义对象绑定到WPF组合框

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