C# viewmodel属性中的更改未反映在UI中

我是WPF新手，我实现了

INotifyPropertyChanged

接口。我有一个包含属性“TeamMemberList”的viewmodel。该控件执行setter部分，更改属性值，但PropertyChanged事件保持为null。 以下是代码：

ViewModelBase：

public class ViewModelBase : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;        
    protected void NotifyPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }        
}

ViewModel：（它继承viewmodelbase） 财产是

    public List<Employee> TeamMemberList
    {
        get
        {
            return _teamMemberList;
        }
        set
        {
            _teamMemberList = value;
            NotifyPropertyChanged("TeamMemberList");
        }
    }

员工培训与实施

public class Employee : ViewModelBase
{

    private string _employeeName;
    private string _employeeId;
    private string _profilePic;
    private string _designation;
    private string _reportinManager;

    public string EmployeeName
    {
        get
        {
            return _employeeName;
        }
        set
        {

            _employeeName = value;
            NotifyPropertyChanged("EmployeeName");
        }

    }


    public string EmployeeId
    {
        get
        {
            return _employeeId;
        }
        set
        {
            _employeeId = value;
            NotifyPropertyChanged("EmployeeId");
        }
    }


    public string ProfilePic
    {
        get
        {
            return _profilePic;
        }
        set
        {
            _profilePic = value;
            NotifyPropertyChanged("ProfilePic");
        }
    }


    public string Designation
    {
        get
        {
            return _designation;
        }
        set
        {
            _designation = value;
            NotifyPropertyChanged("Designation");
        }
    }
    public string ReportingManager
    {
        get
        {
            return _reportinManager;
        }
        set
        {
            _reportinManager = value;
            NotifyPropertyChanged("ReportingManager");
        }
    }
}

---

使用ObserveableCollection而不是列表

当我们看不到更多代码（例如：如何设置DataContext等）时，很难说问题出在哪里

但是，通过向绑定添加以下属性，可以很容易地调试绑定：

<ListBox Margin="10" ItemsSource="{Binding TeamMemberList, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
         PresentationTraceSources.TraceLevel=High>

添加此属性将把整个绑定序列输出到VisualStudio的输出窗口。这应该能指出哪里出了问题

如果要对所有绑定启用此选项，还可以使用Visual Studio选项：

---

除非您为其分配了一个委托，否则该值将为空。。更新绑定不是问题。。显示要更新的代码以及模型（Employee类）的实现。@Sankarann-

除非为该模型指定了一个委托，否则该值将为空。您的意思是什么？@user3217737-您是否将Viewmodel设置为视图的DataContext？@RohitVats:对于绑定的更新，它不需要一个值，对于处理已更改属性的内部使用，
PropertyChanged
可以分配一个委托。但OP希望它仅用于绑定目的。因此，不需要分配委托。虽然列表不允许像ObservableCollection那样进行丰富的交互，但它应该仍然有效，所以我认为这不是解决方案
public class Employee : ViewModelBase
{

    private string _employeeName;
    private string _employeeId;
    private string _profilePic;
    private string _designation;
    private string _reportinManager;

    public string EmployeeName
    {
        get
        {
            return _employeeName;
        }
        set
        {

            _employeeName = value;
            NotifyPropertyChanged("EmployeeName");
        }

    }


    public string EmployeeId
    {
        get
        {
            return _employeeId;
        }
        set
        {
            _employeeId = value;
            NotifyPropertyChanged("EmployeeId");
        }
    }


    public string ProfilePic
    {
        get
        {
            return _profilePic;
        }
        set
        {
            _profilePic = value;
            NotifyPropertyChanged("ProfilePic");
        }
    }


    public string Designation
    {
        get
        {
            return _designation;
        }
        set
        {
            _designation = value;
            NotifyPropertyChanged("Designation");
        }
    }
    public string ReportingManager
    {
        get
        {
            return _reportinManager;
        }
        set
        {
            _reportinManager = value;
            NotifyPropertyChanged("ReportingManager");
        }
    }
}

<ListBox Margin="10" ItemsSource="{Binding TeamMemberList, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
         PresentationTraceSources.TraceLevel=High>