C# 数据网格列dosen'；我不能得到更新

我想每3秒以随机方式更改datagrid中的列值。 我在这里引用了一个链接（）当我在一个文本框上测试它时，它起了作用。 但只有双击单元格时，它才不会更新datagrid列单元格。 这是viewModel，我要更改的列是MarketPrice

 public class PortfolioViewModel : INotifyPropertyChanged
{
    public Order order;
    private readonly Random random = new Random();
     public PortfolioViewModel()
    {
        this.PortfolioViewObs = PortfolioView();


        var timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) };
        timer.Tick += new EventHandler(Timer_Tick);
        timer.Start();

    }

 public ObservableCollection<PortfolioView> PortfolioViewObs
     {
         get;
         set;
     }

 private void Timer_Tick(object sender, EventArgs e)
     {
         for (int i = 0; i < this.PortfolioViewObs.Count; i++)
         {
             this.PortfolioViewObs[i].MarketPrice = random.Next(20, 30);    
         }
     }

PortfolioView是在WCf服务中实现的类

[DataContract]
public class PortfolioView
{
    [DataMember]
    public string Symbol { get; set; }

    [DataMember]
    public float Owned { get; set; }

    [DataMember]
    public float UnitPrice { get; set; }

    [DataMember]
    public float TotalCoast { get; set; }

    [DataMember]
    public float MarketPrice { get; set; }

    [DataMember]
    public float OrderedQuantity { get; set; }
    [DataMember]
    public float AvailabeAmount { get; set; }

}

---

将对

Dispatchermer

的引用存储在字段中，以防止其被垃圾回收：

public class PortfolioViewModel : INotifyPropertyChanged
{
    public Order order;
    private readonly Random random = new Random();
    private readonly DispatcherTimer timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) };

    public PortfolioViewModel()
    {
        this.PortfolioViewObs = new ObservableCollection<PortfolioView>;
        timer.Tick += new EventHandler(Timer_Tick);
        timer.Start();
    }

    public ObservableCollection<PortfolioView> PortfolioViewObs { get; }

    private void Timer_Tick(object sender, EventArgs e)
    {
        for (int i = 0; i < this.PortfolioViewObs.Count; i++)
        {
            this.PortfolioViewObs[i].MarketPrice = random.Next(20, 30);
        }
    }
}

公共类PortfolioViewModel:INotifyPropertyChanged
{
公共秩序；
private readonly Random=new Random（）；
私有只读调度程序计时器=新调度程序{Interval=TimeSpan.FromSeconds（2）}；
公共PortfolioViewModel（）
{
this.PortfolioViewObs=新的可观察集合；
timer.Tick+=新事件处理程序（timer\u Tick）；
timer.Start（）；
}
公共可观测集合PortfolioViewObs{get；}
私有无效计时器（对象发送方、事件参数）
{
for（int i=0；i

---

并在

PortfolioView

类中实现

INotifyPropertyChanged

接口，确保在

MarketPrice

属性设置为新值时引发

PropertyChanged

事件。

我找到了解决方案。实际上，我刚刚创建了我的模型（PortfolioView）类在wpf客户端（不像我那样来自wcf服务），因此它工作得非常好。

---

谢谢你们的帮助

我这么做了，但没什么问题，我还是卡住了。谢谢你的帮助response@Mah10：请向我们展示如何设置窗口的

DataContext

。同时发布

PortfolioView

类的实际实现。@Mah10:编辑您的问题。不要在注释字段中发布代码。@Mah10:Your

PortfolioView

类没有实现

INotifyPropertyChanged

，那你为什么说你按照我的建议做了？

[DataContract]
public class PortfolioView
{
    [DataMember]
    public string Symbol { get; set; }

    [DataMember]
    public float Owned { get; set; }

    [DataMember]
    public float UnitPrice { get; set; }

    [DataMember]
    public float TotalCoast { get; set; }

    [DataMember]
    public float MarketPrice { get; set; }

    [DataMember]
    public float OrderedQuantity { get; set; }
    [DataMember]
    public float AvailabeAmount { get; set; }

}

public class PortfolioViewModel : INotifyPropertyChanged
{
    public Order order;
    private readonly Random random = new Random();
    private readonly DispatcherTimer timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) };

    public PortfolioViewModel()
    {
        this.PortfolioViewObs = new ObservableCollection<PortfolioView>;
        timer.Tick += new EventHandler(Timer_Tick);
        timer.Start();
    }

    public ObservableCollection<PortfolioView> PortfolioViewObs { get; }

    private void Timer_Tick(object sender, EventArgs e)
    {
        for (int i = 0; i < this.PortfolioViewObs.Count; i++)
        {
            this.PortfolioViewObs[i].MarketPrice = random.Next(20, 30);
        }
    }
}