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C# 如何在windows phone 7的列表框中的特定按钮单击上启用SelectionChanged事件？

c# silverlight windows-phone-7

C# 如何在windows phone 7的列表框中的特定按钮单击上启用SelectionChanged事件？,c#,silverlight,windows-phone-7,listbox,C#,Silverlight,Windows Phone 7,Listbox,我正在用C#开发WindowsPhone7应用程序。我不熟悉Windows phone 7应用程序。我对silverlight也是新手。我在xaml文件中使用了ListBox控件&将许多按钮控件动态添加到此ListBox控件。我的xaml代码如下 <phone:PhoneApplicationPage x:Class="ExpenseMgrMobAppl.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xa

我正在用C#开发WindowsPhone7应用程序。我不熟悉Windows phone 7应用程序。我对silverlight也是新手。我在xaml文件中使用了ListBox控件&将许多按钮控件动态添加到此ListBox控件。我的xaml代码如下

<phone:PhoneApplicationPage 
    x:Class="ExpenseMgrMobAppl.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="Expnse Manager" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock x:Name="PageTitle" Text="Entry Details" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"> 

            <toolkit:DatePicker Name="EntryDate" ValueChanged="DatePicker_ValueChanged" Margin="267,0,0,552" />

            <ListBox x:Name="lstButtons" Margin="358,61,10,31" SelectionChanged="lstButtons_SelectionChanged" Width="80" Height="500">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Horizontal">
                            <Button Content="{Binding ElementName}" Width="50" HorizontalAlignment="Center"></Button>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>

            <Button Content="Add" Height="72" HorizontalAlignment="Left" Margin="107,504,0,0" Name="Addbutton" VerticalAlignment="Top" Width="160" Click="Addbutton_Click" />
        </Grid>
    </Grid>

    <!--Sample code showing usage of ApplicationBar-->
    <!--<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2"/>
            <shell:ApplicationBar.MenuItems>
                <shell:ApplicationBarMenuItem Text="MenuItem 1"/>
                <shell:ApplicationBarMenuItem Text="MenuItem 2"/>
            </shell:ApplicationBar.MenuItems>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>-->

</phone:PhoneApplicationPage>

<phone:PhoneApplicationPage 
    x:Class="WindowsPhoneNavigation.Views.Pictures.Default"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock Text="{StaticResource AppName}" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock Text="Images" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <StackPanel Orientation="Vertical">
                <StackPanel Orientation="Horizontal" Margin="5">
                    <Button x:Name="btnRemoveSelection" Content="Remove Image" Click="btnRemoveSelection_Click" IsEnabled="False"/>
                </StackPanel>

                <ListBox x:Name="lstPictures" Width="450" Height="520" Margin="10" SelectionChanged="lstPictures_SelectionChanged">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel Orientation="Horizontal">
                                <Image Source="{Binding Image}" Width="100" Stretch="Uniform" HorizontalAlignment="Center"/>
                                <TextBlock Text="{Binding Filename}" TextWrapping="Wrap" />
                            </StackPanel>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </StackPanel>
        </Grid>
    </Grid>

    <!--Sample code showing usage of ApplicationBar-->
    <!--<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2"/>
            <shell:ApplicationBar.MenuItems>
                <shell:ApplicationBarMenuItem Text="MenuItem 1"/>
                <shell:ApplicationBarMenuItem Text="MenuItem 2"/>
            </shell:ApplicationBar.MenuItems>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>-->

</phone:PhoneApplicationPage>
在上面的代码中，所有内容都是工作文件。唯一的问题是我无法启动方法SelectionChanged=“lstButtons\u SelectionChanged”。我可以通过单击listbox控件区域的边缘来触发此方法。当我点击按钮正方形的中间时，该方法不会触发。但是，当我在按钮的正方形区域外单击时（该区域位于按钮的正确方向&该区域靠近listbox控件区域的边缘），就会触发该方法。我想这是因为我没有点击正确的区域。我想我无法在我的代码中指定按钮单击的正确位置&这就是事件未触发的原因

我有另一个类似的例子，一切都正常&事件也正常启动。本例的xaml如下所示

<phone:PhoneApplicationPage 
    x:Class="ExpenseMgrMobAppl.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="Expnse Manager" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock x:Name="PageTitle" Text="Entry Details" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"> 

            <toolkit:DatePicker Name="EntryDate" ValueChanged="DatePicker_ValueChanged" Margin="267,0,0,552" />

            <ListBox x:Name="lstButtons" Margin="358,61,10,31" SelectionChanged="lstButtons_SelectionChanged" Width="80" Height="500">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Horizontal">
                            <Button Content="{Binding ElementName}" Width="50" HorizontalAlignment="Center"></Button>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>

            <Button Content="Add" Height="72" HorizontalAlignment="Left" Margin="107,504,0,0" Name="Addbutton" VerticalAlignment="Top" Width="160" Click="Addbutton_Click" />
        </Grid>
    </Grid>

    <!--Sample code showing usage of ApplicationBar-->
    <!--<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2"/>
            <shell:ApplicationBar.MenuItems>
                <shell:ApplicationBarMenuItem Text="MenuItem 1"/>
                <shell:ApplicationBarMenuItem Text="MenuItem 2"/>
            </shell:ApplicationBar.MenuItems>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>-->

</phone:PhoneApplicationPage>

<phone:PhoneApplicationPage 
    x:Class="WindowsPhoneNavigation.Views.Pictures.Default"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock Text="{StaticResource AppName}" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock Text="Images" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <StackPanel Orientation="Vertical">
                <StackPanel Orientation="Horizontal" Margin="5">
                    <Button x:Name="btnRemoveSelection" Content="Remove Image" Click="btnRemoveSelection_Click" IsEnabled="False"/>
                </StackPanel>

                <ListBox x:Name="lstPictures" Width="450" Height="520" Margin="10" SelectionChanged="lstPictures_SelectionChanged">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel Orientation="Horizontal">
                                <Image Source="{Binding Image}" Width="100" Stretch="Uniform" HorizontalAlignment="Center"/>
                                <TextBlock Text="{Binding Filename}" TextWrapping="Wrap" />
                            </StackPanel>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </StackPanel>
        </Grid>
    </Grid>

    <!--Sample code showing usage of ApplicationBar-->
    <!--<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2"/>
            <shell:ApplicationBar.MenuItems>
                <shell:ApplicationBarMenuItem Text="MenuItem 1"/>
                <shell:ApplicationBarMenuItem Text="MenuItem 2"/>
            </shell:ApplicationBar.MenuItems>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>-->

</phone:PhoneApplicationPage>
你能告诉我在上述第一个案例中我哪里出了问题吗？你能提供我任何代码或链接，通过它我可以解决上述问题。对于上面描述的第一种情况，我应该在代码中做什么修改，以便当我在按钮区域的正方形上单击时，事件SelectionChanged=“lstButtons\u SelectionChanged”被触发？

可能发生的情况是，
按钮在默认情况下正在处理单击事件，因此不允许它传播到
列表框
。我假设您的目的是访问与包含您单击的按钮的行关联的数据对象。在这种情况下，您可以添加按钮单击处理程序并使用以下命令：


void Button_Click(object sender, RoutedEventArgs e)
{
  Button b = sender as Button;  // sender is the button user clicked
  MyDataObject data = b.DataContext as MyDataObject;  // data is the MyDataObject for that row
  // ...
}



第二个示例之所以有效，是因为
TextBlock
和
Image
都没有在点击事件到达
ListBox
SelectionChanged
处理程序之前拦截点击事件。
可能发生的情况是，
按钮在默认情况下处理点击事件，因此不允许它传播转到
列表框
。我假设您的目的是访问与包含您单击的按钮的行关联的数据对象。在这种情况下，您可以添加按钮单击处理程序并使用以下命令：


void Button_Click(object sender, RoutedEventArgs e)
{
  Button b = sender as Button;  // sender is the button user clicked
  MyDataObject data = b.DataContext as MyDataObject;  // data is the MyDataObject for that row
  // ...
}


第二个示例之所以有效，是因为
TextBlock
和
Image
都没有在click事件到达
ListBox
SelectionChanged
处理程序之前拦截它