[WPF][ListBox]鼠标拖拽多选,（Shift Key、Ctrl Key多选有效）（转）

<ListBox Name="listBox" SelectionMode="Extended">

<ListBox.Resources>

<Style TargetType="{x:Type ListBoxItem}">

<EventSetter Event="ListBoxItem.PreviewMouseLeftButtonDown" Handler="lbItem_PreviewMouseLeftButtonDown"/>

<EventSetter Event="ListBoxItem.PreviewMouseUp" Handler="lbItem_PreviewMouseUp"/>

<EventSetter Event="ListBoxItem.PreviewMouseMove" Handler="lbItem_PreviewMouseMove"/>

</Style>

</ListBox.Resources>

<x:Type TypeName="DependencyObject"/>

<x:Type TypeName="Visual"/>

<x:Type TypeName="UIElement"/>

<x:Type TypeName="FrameworkElement"/>

<x:Type TypeName="Control"/>

</ListBox>

private bool inMouseSelectionMode = false;

private List<ListBoxItem> selectedItems = new List<ListBoxItem>();

private void lbItem_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)

{

// MouseDown时清空已选Item

// 同时开始"inMouseSelectionMode"

foreach (var item in selectedItems)

{

item.ClearValue(ListBoxItem.BackgroundProperty);

item.ClearValue(TextElement.ForegroundProperty);

}

selectedItems.Clear();

inMouseSelectionMode = true;

}

private void lbItem_PreviewMouseUp(object sender, MouseButtonEventArgs e)

{

// MouseUp时停止"inMouseSelectionMode"

ListBoxItem mouseUpItem = sender as ListBoxItem;

inMouseSelectionMode = false;

}

private void lbItem_PreviewMouseMove(object sender, MouseEventArgs e)

{

ListBoxItem mouseOverItem = sender as ListBoxItem;

if (mouseOverItem != null && inMouseSelectionMode && e.LeftButton == MouseButtonState.Pressed)

{

// Mouse所在的Item设置高亮

mouseOverItem.Background = SystemColors.HighlightBrush;

mouseOverItem.SetValue(TextElement.ForegroundProperty, SystemColors.HighlightTextBrush);

if (!selectedItems.Contains(mouseOverItem)) { selectedItems.Add(mouseOverItem); }

}

}

　　本文来自ny_dsc的博客，原文地址：http://hi.baidu.com/ny_dsc/blog/item/2bc69a31fdfb3186a8018e9a.html