在Windows窗体应用程序中过滤列表框

问题描述

是否可以在Windows Forms应用程序中过滤列表框的内容?

Is it possible to filter the contents of a Listbox in a Windows Forms application?

我的ListBox的数据源是一个BindingSource，在其中包含一堆DTO:

The DataSource of my ListBox is a BindingSource containing a bunch of DTOs in an:

IList<DisplayDTO>

我要过滤ListBox的DisplayMember中指定的DTO属性.

I want to filter on the DTO property that is specified in the ListBox's DisplayMember.

要过滤的文本在单独的文本框中提供.

The text to be filtered on is provided in a separate Text Box.

推荐答案

这应该有效:

private void textBox_TextChanged(object sender, EventArgs e)
{
    bindingSource.Filter = string.Format("[{0}] LIKE '%{1}%'",
                                         listBox.DisplayMember,
                                         textBox.Text.Replace("'", "''"));
}

仅当基础数据源(bindingSource.DataSource)实现IBindingListView时，此方法才有效.在FCL中，只有DataView类实现此接口.

this works only if the underlying data source (bindingSource.DataSource) implements IBindingListView. In the FCL, only the DataView class implements this interface.

您可以通过从BindingList<T>继承来创建自己的实现.这是一篇文章解释了如何添加过滤器功能.您还可以在Google上找到SortableBindingList的各种实现.

You can create your own implementation by inheriting from BindingList<T>. Here's an article that explains how to add the filter functionality. You can also find various implementations of SortableBindingList on Google.

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