Question

我尝试绑定镜头对象列表，我想在我的组合框中显示LensName属性。我的代码中的列表包含对象，但组合框保持为空或属性不显示。我已经尝试了所有已知的方法来绑定我的数据而没有结果。谢谢你的帮助

的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;

                    }
                }

我的班级镜头

 [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;
        }

Answer 1

您需要属性，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，你的绑定中有一个拼写错误：Source=LefttBestLensList。（一个额外的＆＃34; t＆＃34;）外壳是错误的（＆＃34; ......镜头......＆＃34; vs.＆＃34; ......镜头......＆＃34; ）。

Answer 2

RightBestlensList和LeftBestlensList必须位于ViewModel类中，而不是Code Behind中，它们必须是属性。

Answer 3

你必须尝试下面的代号。

你必须在ViewModel Like

中声明ObservableCollection

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

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

你的镜片课程应该是

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

}

WPF绑定ObservableCollection到ComboBox

3 个答案: