WPF将ObservableCollection绑定到ComboBox

本文关键字：ComboBox 绑定 ObservableCollection WPF | 更新日期: 2023-09-27 18:06:57

我尝试绑定一个Lens Objects列表，我想在我的组合框中显示LensName属性。代码中的列表包含对象，但组合框仍然为空或不显示属性。我已经尝试了所有已知的方法来绑定我的数据，但没有结果。谢谢你的帮助

Xaml 

<ComboBox  x:Name="RightbestlensCombo" ItemsSource="{Binding Source=RightBestLensList}" DisplayMemberPath="LensName" SelectedValuePath="LensTypeId" />
    <ComboBox x:Name="LeftbestlensCombo"  ItemsSource="{Binding Source=LefttBestLensList}" DisplayMemberPath="LensName" SelectedValuePath="LensTypeId"  ></ComboBox>

背后的代码
      public ObservableCollection<OphtalboxIA.Lens> RightBestlensList = new ObservableCollection<OphtalboxIA.Lens>();
        public ObservableCollection<OphtalboxIA.Lens> LeftBestlensList = new ObservableCollection<OphtalboxIA.Lens>();

 if (OphtalboxIA.OphtalboxComputingModule.LeftBestLensList != null)
                {
                    if (OphtalboxIA.OphtalboxComputingModule.LeftBestLensList.Count > 0)
                    {        
                        LeftBestlensList=new ObservableCollection<OphtalboxIA.Lens>(OphtalboxIA.OphtalboxComputingModule.LeftBestLensList);
                    //LeftbestlensCombo.ItemsSource = LeftBestlensList;
                    }
                }
                if (OphtalboxIA.OphtalboxComputingModule.RightBestLensList != null)
                {
                    if (OphtalboxIA.OphtalboxComputingModule.RightBestLensList.Count > 0)
                    {
                         RightBestlensList=new ObservableCollection<OphtalboxIA.Lens>(OphtalboxIA.OphtalboxComputingModule.RightBestLensList);
                       //RightbestlensCombo.ItemsSource = RightBestlensList;
                    }
                }

My class Lens

 [XmlInclude(typeof(Lens))]
    public class Lens{
        public String LensName;
        public String LensType;
        public String LensTypeTrial;
        public float Diameter;
        public float Radius;
        public float Sphere;
        public float Cylinder;
        public int Axis;
        public String Addition;
        public String Description;
        public int isRX;
        public int isOphtalBox;
        public int priorityOrder;
        public int LensFrequencyId;
        public string LensFrequencyName;
        public int LensTypeId;
        public int LensMaterialId;
        }

WPF将ObservableCollection绑定到ComboBox

您需要的是属性，而不是字段。这些是字段:

public ObservableCollection<OphtalboxIA.Lens> RightBestlensList = new ObservableCollection<OphtalboxIA.Lens>();
public ObservableCollection<OphtalboxIA.Lens> LeftBestlensList = new ObservableCollection<OphtalboxIA.Lens>();

作为属性，它们看起来像这样:

private readonly ObservableCollection<OphtalboxIA.Lens> _rightList = new ObservableCollection<OphtalboxIA.Lens>();
private readonly ObservableCollection<OphtalboxIA.Lens> _leftList = new ObservableCollection<OphtalboxIA.Lens>();
public ObservableCollection<OphtalboxIA.Lens> RightBestlensList { get { return _rightList; }}
public ObservableCollection<OphtalboxIA.Lens> LeftBestlensList { get { return _leftList; }}

此外，绑定中有一个错别字:Source=LefttBestLensList。(多了一个"t")并且外壳是错误的("…Lens…"vs。"……镜头……")。

RightBestlensList和LeftBestlensList必须在ViewModel类中，而不是在Code Behind中，并且它们必须是属性

您必须尝试下面提到的代码。

你必须在ViewModel中声明ObservableCollection 

 private ObservableCollection<Lens> _RightBestLensList = new ObservableCollection<Lens>();
    public ObservableCollection<Lens> RightBestLensList
    {
        get { return _RightBestLensList; }
        set { _RightBestLensList = value; RaisePropertyChanged("RightBestLensList"); }
    }

你的Lens类应该是

[XmlInclude(typeof(Lens))]
public class Lens
{
    public string LensName { get; set; }
    public string  LensType { get; set; }
}
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