Question

我是WPF的新手。我已成功将源类属性绑定到目标控件。但是，只要属性值更改，UI控件就不会反映更新的数据。请帮忙

WPF代码：

<Label Name="Panel_ch1Mode" Content="{Binding Path=Mode, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"  FontFamily="Roboto Regular" FontSize="16" Foreground="#FFFFFF"/>

我的班级：

public class ClassName: INotifyPropertyChanged
{
//Auto Refresh
        private string mode;
        public string Mode
        {
            get
            {
                return this.mode;
            }
            set
            {
                this.mode = value;
                NotifyPropertyChanged("Mode");
            }
        }

    public event PropertyChangedEventHandler PropertyChanged;

        public void NotifyPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));


        }
}

Answer 1

试试这个：只需从xaml中删除UpdateSourceTrigger = PropertyChanged，Mode = TwoWay。）

改进你的INotifyPropertyChanged linke的实现：

private void NotifyPropertyChanged([CallerMemberName] string propertyName = null)
{
    var handler = PropertyChanged;
    if (handler != null)
        handler(this, new PropertyChangedEventArgs(propertyName));
}

Answer 2

在代码背后，请检查ViewModel是否是＆＃34;有线＆＃34;到视图：

   public YourView()
   {
            InitializeComponent();
            DataContext = new ClassName();
   }

您必须记住，绑定始终与DataContext相关。

绑定不从INotifyPropertyChanged类更新

2 个答案: