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WPF將ObservableCollection綁定到ComboBox

[英]WPF Binding ObservableCollection to ComboBox

我嘗試綁定一個Lens Objects列表,我想在我的組合框中顯示LensName屬性。我的代碼列表中包含對象,但組合框保持為空或該屬性不顯示。我已經嘗試了所有已知的綁定方法我的數據沒有結果。感謝您的幫助

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>

背后的代碼

      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;

                    }
                }

我班的鏡頭

 [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;
        }

您需要屬性,而不是字段。 這些是字段:

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

作為屬性,它們將如下所示:

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,綁定中有一個錯字: Source=LefttBestLensList (一個額外的“ t”),並且該框是錯誤的(“ ... Lens ...”與“ ... lens ...”)。

RightBestlensListLeftBestlensList必須在ViewModel類中,而不能在代碼RightBestlensList ,並且它們必須是屬性。

您必須嘗試下面提到的代碼。

您必須在ViewModel中聲明ObservableCollection,例如

 private ObservableCollection<Lens> _RightBestLensList = new ObservableCollection<Lens>();

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

您的鏡頭課應該是

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

}

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