removeall过的ObservableCollections? [英] RemoveAll for ObservableCollections?
问题描述
我要寻找的Linq的方式(如RemoveAll方法的列表),它可以删除选定的从我的ObservableCollection项目。
I am looking for Linq way (like RemoveAll method for List) which can remove selected items from my ObservableCollection.
我太新创建的扩展方法我。有什么办法,我从的ObservableCollection删除项目传递一个Lambda表达式?
I am too new to create an extension method for myself. Is there any way I remove items from ObservableCollection passing a Lambda expression?
推荐答案
我不知道的方式只有删除选择的项目。但是创建一个扩展方法是直截了当:
I am not aware of a way to remove only the selected items. But creating an extension method is straight forward:
public static class ExtensionMethods
{
public static int Remove<T>(
this ObservableCollection<T> coll, Func<T, bool> condition)
{
var itemsToRemove = coll.Where(condition).ToList();
foreach (var itemToRemove in itemsToRemove)
{
coll.Remove(itemToRemove);
}
return itemsToRemove.Count;
}
}
这将删除的ObservableCollection
符合条件。你可以把它像:
This removes all items from the ObservableCollection
that match the condition. You can call it like that:
var c = new ObservableCollection<SelectableItem>();
c.Remove(x => x.IsSelected);
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