?<ListView???x:Name="TrackListView"? MouseDoubleClick="MouseDoubleClick"
????????????????? SelectionChanged="SelectionChanged" >

ListView中的MouseDoubleClick雙擊時不觸發SelectionChanged的選中事件，獲取不到當前雙擊的Item，即this.TrackListView.SelectedItem中的數據對象為null。

protected void MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
????? var item = this.TrackListView.SelectedItem as Track;//is null

???? //this.TrackListView.SelectedItem is null
}

如果雙擊時剛好觸發了SelectionChanged事件，那么當前listView中的selectItem是有數據的，那怎么解決不觸發時而又想獲取到當前雙擊Item數據對象呢，方法如下:

?

<UserControl.Resources>
??? <Style x:Key="itemstyle" TargetType="{x:Type ListViewItem}">
??????? <EventSetter Event="MouseDoubleClick" Handler="HandleDoubleClick" />
??? </Style>
</UserControl.Resources>

<ListView Name="TrackListView" ItemContainerStyle="{StaticResource itemstyle}">
??? <ListView.View>
??????? <GridView>
??????????? <GridViewColumn Header="Title" Width="100" HeaderTemplate="{StaticResource BlueHeader}" DisplayMemberBinding="{Binding Name}"/>
??????????? <GridViewColumn Header="Artist" Width="100" HeaderTemplate="{StaticResource BlueHeader}" DisplayMemberBinding="{Binding Album.Artist.Name}" />
??????? </GridView>
??? </ListView.View>
</ListView>

?

protected void HandleDoubleClick(object sender, MouseButtonEventArgs e)
{
??? var track = ((ListViewItem) sender).Content as Track; //Casting back to the binded Track
}

轉載于:https://www.cnblogs.com/ligl/p/5629802.html

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