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如何：處理 ListView 中每個項目的 MouseDoubleClick 事件

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若要處理 ListView 中項目的事件，您必須將事件處理程序新增至每個 ListViewItem。 當 ListView 繫結至資料來源時，您不會明確建立 ListViewItem，但您可以將 EventSetter 新增至 ListViewItem 樣式來處理每個項目的事件。

範例

下列範例會建立資料繫結 ListView，並建立 Style，已新增事件處理程式至每個 ListViewItem。

<!--XmlDataProvider is defined in a ResourceDictionary, 
    such as Window.Resources-->
<XmlDataProvider x:Key="InventoryData" XPath="Books">
    <x:XData>
        <Books xmlns="">
            <Book ISBN="0-7356-0562-9" Stock="in" Number="9">
                <Title>XML in Action</Title>
                <Summary>XML Web Technology</Summary>
            </Book>
            <Book ISBN="0-7356-1370-2" Stock="in" Number="8">
                <Title>Programming Microsoft Windows With C#</Title>
                <Summary>C# Programming using the .NET Framework</Summary>
            </Book>
            <Book ISBN="0-7356-1288-9" Stock="out" Number="7">
                <Title>Inside C#</Title>
                <Summary>C# Language Programming</Summary>
            </Book>
            <Book ISBN="0-7356-1377-X" Stock="in" Number="5">
                <Title>Introducing Microsoft .NET</Title>
                <Summary>Overview of .NET Technology</Summary>
            </Book>
            <Book ISBN="0-7356-1448-2" Stock="out" Number="4">
                <Title>Microsoft C# Language Specifications</Title>
                <Summary>The C# language definition</Summary>
            </Book>
        </Books>
    </x:XData>
</XmlDataProvider>

<!--The Style is defined in a ResourceDictionary, 
    such as Window.Resources-->
<Style TargetType="ListViewItem">
    <EventSetter Event="MouseDoubleClick" Handler="ListViewItem_MouseDoubleClick"/>
</Style>

<ListView ItemsSource="{Binding Source={StaticResource InventoryData}, XPath=Book}">
    <ListView.View>
        <GridView>
            <GridViewColumn Width="300" Header="Title" 
                            DisplayMemberBinding="{Binding XPath=Title}"/>
            <GridViewColumn Width="150" Header="ISBN" 
                            DisplayMemberBinding="{Binding XPath=@ISBN}"/>
        </GridView>
    </ListView.View>
</ListView>

下列範例會處理 MouseDoubleClick 事件。

void ListViewItem_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{

    XmlElement book = ((ListViewItem) sender).Content as XmlElement;

    if (book == null)
    {
        return;
    }

    if (book.GetAttribute("Stock") == "out")
    {
        MessageBox.Show("Time to order more copies of " + book["Title"].InnerText);
    }
    else
    {
        MessageBox.Show(book["Title"].InnerText + " is available.");
    }
}

Private Sub ListViewItem_MouseDoubleClick(ByVal sender As Object, _
                                          ByVal e As MouseButtonEventArgs)

    Dim lvi As ListViewItem = CType(sender, ListViewItem)
    Dim book As XmlElement = CType(lvi.Content, XmlElement)

    If book.GetAttribute("Stock") = "out" Then
        MessageBox.Show("Time to order more copies of " + book("Title").InnerText)
    Else
        MessageBox.Show(book("Title").InnerText + " is available.")
    End If
End Sub

注意

雖然最常見的方式是將 ListView 繫結至資料來源，但不論您是否明確建立 ListViewItem，都可以使用樣式將事件處理程式新增至非資料繫結 ListView 中的每個 ListViewItem。 如需明確和隱含建立 ListViewItem 控制項的詳細資訊，請參閱 ItemsControl。

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