WPF 过滤列表框 [英] WPF Filter a ListBox

问题描述

我有一个 ListBox 绑定到一个字符串列表.我想在 TextBox 中输入文本时过滤列表.我该怎么做?

public void ListLoad(){ElementList = new List();//创建一个字符串列表ElementList.Add("1");//添加一个字符串项ElementList.Add("2");//添加一个字符串项数据上下文 = 这个；//设置数据上下文}

我在 XAML 中绑定它:

ItemsSource="{Binding ElementList}"

解决方案

CollectionViewSource 类可以在这里提供帮助.据我所知，它有许多功能来过滤、排序和分组集合.

ICollectionView view = CollectionViewSource.GetDefaultView(ElementList);view.Filter = (o) =>{return o;}//这里是带有过滤条件的 lambda

当您不需要任何过滤器时，只需将 view.Filter 设置为 null.另请查看有关过滤

I have a ListBox with binding to a list of strings. I want to filter the list when I enter text in a TextBox. How can I do it?

public void ListLoad()
{
    ElementList = new List<string>(); // creation a list of strings
    ElementList.Add("1"); // add a item of string
    ElementList.Add("2"); // add a item of string

    DataContext = this; // set the data context
}

I'm binding it in XAML with:

ItemsSource="{Binding ElementList}"

解决方案

CollectionViewSource class can help here. As far as I can tell it has many capabilities to filter, sort and group collections.

ICollectionView view = CollectionViewSource.GetDefaultView(ElementList);
view.Filter = (o) => {return o;}//here is the lambda with your conditions to filter

When you don't need any filter just set view.Filter to null. Also check out this article on filtering

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