一个更好的方式来强制数据绑定WPF ListBox进行更新? [英] A better way of forcing data bound WPF ListBox to update?
问题描述
当收集更改,所有项目更新他们的位置。
新的位置存储在该集合,但UI不更新。
所以我添加了以下内容:
void scenarioItems_CollectionChanged(object sender,System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
ToolboxListItem.UpdatePositions();
lstScenario.ItemsSource = null;
lstScenario.ItemsSource = ToolboxListItem.ScenarioItems;
this.lstScenario.SelectedIndex = e.NewStartingIndex;
}
通过将ItemsSource设置为null,然后再次绑定,UI被更新
但这可能是非常糟糕的编码:p
建议?
我有一个列表框绑定到一个对象属性,类型为 List< MyCustomType>()
我确认下列代码在列表更新时更新列表框。
void On_MyObjProperty_PropertyChanged(object sender,System.ComponentModel.PropertyChangedEventArgs e)
{
MyListBox.Items.Refresh();
}
如果仍然面临问题,请扫描VS IDE输出窗口(Ctrl + W,O),看看是否可以发现任何报告的绑定错误。
I have WPF ListBox which is bound to a ObservableCollection, when the collection changes, all items update their position.
The new position is stored in the collection but the UI does not update. So I added the following:
void scenarioItems_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
ToolboxListItem.UpdatePositions();
lstScenario.ItemsSource = null;
lstScenario.ItemsSource = ToolboxListItem.ScenarioItems;
this.lstScenario.SelectedIndex = e.NewStartingIndex;
}
By setting the ItemsSource to null and then binding it again, the UI is updated,
but this is probably very bad coding :p
Suggestions?
I have a Listbox bound to an object property which is of type List<MyCustomType>()
and I verified that the following code updates the listbox when the List is updated.
void On_MyObjProperty_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
MyListBox.Items.Refresh();
}
If you're still facing issues, scan the VS IDE output window (Ctrl+W, O) and see if you can spot any binding errors reported.
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