綁定到列表框的組合框數據將不會顯示顯示成員

Question

我有一個組合框來填充數據庫中的數據，它基於列表框選擇通過SQL查詢填充給定列表框中的數據。問題是顯示成員屬性不會顯示。我不會顯示後端SQL，因爲這可以正常工作，並且列表框實際上只填充顯示成員。所以列表框中的數據是空白的。

下面是代碼：

組合框的方法：

private void populateFromMedication() 
{ 
    MedicationList medicationItem = new MedicationList(); 

    // if item is selected 
    if(!((Locations)cmbLocationDescriptionList.SelectedItem == null)) 
    { 
     // set location to be the seletect location from the combo 
     location = (Locations)cmbLocationDescriptionList.SelectedItem; 

     List<MedicationList> fromMedicatitionList = new List<MedicationList>(); 
     // retrieve a list of medication from the database 
     fromMedicatitionList = LocationData.RetrieveMedicationByLocation(location.LocationID, GlobalVariables.SelectedResident.ResidentID); 
     //bind the list for to the medication list 
     lstMedicationForCurrentLocation.ItemsSource = fromMedicatitionList; 

     lstMedicationForCurrentLocation.DisplayMemberPath = "Description";   
    } 
} 

在形式初始化：

public FormInitialize() 
{ 
    InitializeComponent(); 
    LoadData(); 
    LoadResidentData(); 
    populateFromMedication(); 
} 

MedicationList類：

  public class MedicationList 
{ 

    public int MedicationID { get; set; } 



    public string Description 
    { 
     get 
     { 
      return Description; 
     } 
     set 
     { 
      Description = value; 
      OnPropertyChanged("Description"); 
     } 
    } 
} 

Answer 1

您需要檢查

1）MedicationList有一個名爲Description的房產，並且OnPropertyChanged已應用於其設置者。

string _Description; 
public string Description 
{ 
    get 
    { 
     return _Description; 
    } 
    set 
    { 
     _Description = value; 
     OnPropertyChanged("Description"); 
    } 
} 

更多關於OnPropertyChanged閱讀this

2）儘量提供Itemsource之前給Displaymember。