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我有一个组合框绑定到一个ObservableCollection <源>。在类中有2个属性ID和类型,以及ToString()方法,其中我将ID与Type结合在一起。当我更改组合框中的类型时,它仍然显示旧的类型,但对象已更改。绑定到Combobox的ObservableCollection ToString方法不更新
public partial class ConfigView : UserControl,INotifyPropertyChanged
{
public ObservableCollection<Source> Sources
{
get { return _source; }
set { _source = value;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("Sources"));
}
}
public ConfigView()
{
InitializeComponent();
this.DataContext = this;
Sources = new ObservableCollection<Source>();
}
public ChangeSelected(){
Source test = lstSources.SelectedItem as Source;
test.Type = Types.Tuner;
}
}
查看:
<ListBox x:Name="lstSources" Background="Transparent" Grid.Row="1" SelectionChanged="lstSources_SelectionChanged" ItemsSource="{Binding Sources, Mode=TwoWay}" />
来源类别:
public enum Types { Video, Tuner }
[Serializable]
public class Source: INotifyPropertyChanged
{
private int id;
public int ID
{
get { return id; }
set { id = value;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("ID"));
}
}
private Types type;
public Types Type
{
get { return type; }
set { type = value;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("Type"));
}
}
public Source(int id, Types type)
{
Type = type;
ID = id;
}
public override string ToString()
{
return ID.ToString("00") + " " + Type.ToString();
}
public event PropertyChangedEventHandler PropertyChanged;
}
当类型为视频组合框显示01Video当我改变类型调谐器组合框仍显示01Video但应是01Tuner。但是,当我调试对象类型更改为调谐器。
这对你有价值吗? http://www.c-sharpcorner.com/UploadFile/rvemura.net/two-way-databinding-in-wpf/ – WozzeC
当你用null或string.empty提升PropertyChangedEvent时,它会改变吗?像'PropertyChanged(this,new PropertyChangedEventArgs(null))'否则是Nicolas Repiquet的答案right – Jehof
我刚刚添加了PropertyChanged事件以尝试是否有效。但事实并非如此。 –