无法绑定到 WPF 数据网格

Question

我有一个希望绑定到以下数据模型的 WPF 数据网格，但我似乎无法正确设置。最初，我绑定的 List 是空的，我想让用户能够输入信息。所以我这样定义数据网格：

<DataGrid Name="dgUsers" AutoGenerateColumns="True" CanUserAddRows="True" CanUserDeleteRows="True"/>

我的模型类如下：

public class User
{
    public int Id { get; set; }
    public string Name { get; set; }
    public DateTime Birthday { get; set; }

    public string Details
    {
        get
        {
            return String.Format("{0} was born on {1} and this is a long description of the person.", this.Name, this.Birthday.ToLongDateString());
        }
    }
}

public class Group : INotifyPropertyChanged
{
    private string _id = Guid.NewGuid().ToString();

    private string _name;
    public string Name
    {
        get { return this._name; }
        set
        {
            if (value != this._name)
            {
                this.Name = value;
                OnPropertyChanged("Name");
            }
        }
    }

    public string ID { get { return this._id; } }
    public List<User> GroupUsers
    {
        get;
        set;
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

我想要做的是绑定到 Group 类，但只绑定到 GroupUsers 值。我怎么做？我是否为双向绑定正确定义了我的用户属性 GroupUsers？

Answer 1

您需要让User 类实现INotifyPropertyChanged 和GroupUsers 属性应该是ObservableCollection<T>。