Question

好的，我已经在应用程序上工作了一段时间，这是我制作的第一个Windows手机应用程序，而且我遇到了一个问题。我设计我的应用程序的方式是我的起始页面是一个集线器控件，我有两个文本框和每个页面上的日期选择器和一些其他控件。现在我想要做的是当我按下给定部分的添加按钮然后我想从我的各种控件中取出所有字符串并将其添加到我稍后将使用的文本文件中。我的问题是，当我为按钮创建事件时，我无法访问控件，因为它们位于集线器数据模板中。我已经看了很多关于如何解决这个问题的其他例子，他们似乎没有工作，我无法理解它们。因此，如果这里的任何人都有耐心等待我完成这个过程非常棒的过程。谢谢你的帮助。

<Page.Resources>
        <DataTemplate x:Key="DataTemplate1">
            <Grid>
                <TextBlock HorizontalAlignment="Left" Margin="85,7,0,0" TextWrapping="Wrap" Text=":" VerticalAlignment="Top" FontSize="21.333"/>
                <TextBox x:Name="tbHours" LostFocus="tbHours_LostFocus" HorizontalAlignment="Left" Margin="0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" InputScope="Number" PlaceholderText="   hrs" Width="80"/>
                <TextBox x:Name="tbMinutes" LostFocus="tbMinutes_LostFocus" HorizontalAlignment="Left" Margin="95,0,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" InputScope="Number" PlaceholderText="   min" Width="80"/>
                <TextBlock HorizontalAlignment="Left" Margin="0,50,0,0" TextWrapping="Wrap" Text="Work date" VerticalAlignment="Top" FontSize="14.667"/>
                <DatePicker LostFocus="DatePicker_LostFocus" HorizontalAlignment="Left" Margin="0,65,0,0" VerticalAlignment="Top" Width="127"/>
                <AppBarButton x:Name="abtnAddHours" HorizontalAlignment="Left" Icon="Add" Label="" Margin="118,65,0,0" VerticalAlignment="Top" Click="abtnAddHours_Click"/>
            </Grid>
        </DataTemplate>
        <DataTemplate x:Key="DataTemplate2">
            <Grid>
                <TextBlock HorizontalAlignment="Left" Margin="0,7,0,0" TextWrapping="Wrap" Text="$" VerticalAlignment="Top" FontSize="21.333"/>
                <TextBox x:Name="tbExpenses" LostFocus="tbExpenses_LostFocus" HorizontalAlignment="Left" Margin="15,0,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" InputScope="Number" PlaceholderText="   0.00" Width="100"/>
                <TextBlock HorizontalAlignment="Left" Margin="0,45,0,0" TextWrapping="Wrap" Text="Expense date" VerticalAlignment="Top" FontSize="14.667"/>
                <DatePicker x:Name="dtpkrExpenses" LostFocus="dtpkrExpenses_LostFocus" HorizontalAlignment="Left" Margin="0,60,0,0" VerticalAlignment="Top" Width="115"/>
                <TextBlock HorizontalAlignment="Left" Margin="0,115,0,0" TextWrapping="Wrap" Text="Expense notes" VerticalAlignment="Top" FontSize="14.667"/>
                <TextBox x:Name="tbNotes" LostFocus="tbNotes_LostFocus" HorizontalAlignment="Left" Margin="0,140,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="200"/>
                <AppBarButton x:Name="abtnAddExpense" HorizontalAlignment="Left" Icon="Add" Label="" Margin="193,128,0,0" VerticalAlignment="Top"/>
            </Grid>
        </DataTemplate>
        <DataTemplate x:Key="DataTemplate3">
            <Grid>
                <TextBlock HorizontalAlignment="Left" Margin="0" TextWrapping="Wrap" VerticalAlignment="Top" FontSize="14.667" Text="Working hour rate" Height="20"/>
                <TextBlock HorizontalAlignment="Left" Margin="0,32,0,0" TextWrapping="Wrap" VerticalAlignment="Top" FontSize="21.333" Text="$"/>
                <TextBox x:Name="tbWage" LostFocus="tbWage_LostFocus" HorizontalAlignment="Right" Margin="0,25,237,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" InputScope="Number" PlaceholderText="   0.00" Width="89"/>
                <AppBarButton x:Name="abtnAddWage" HorizontalAlignment="Left" Icon="Add" Label="" Margin="92,14,0,0" VerticalAlignment="Top"/>
            </Grid>
        </DataTemplate>
    </Page.Resources>
    <Page.BottomAppBar>
        <CommandBar ClosedDisplayMode="Compact">
            <CommandBar.SecondaryCommands>
                <AppBarButton Label="Reset"/>
            </CommandBar.SecondaryCommands>
            <AppBarButton x:Name="abtnSummary" Icon="List" Label="Summary" Click="abtnSummary_Click"/>
        </CommandBar>
    </Page.BottomAppBar>

    <Grid>
        <Hub x:Name="Hub" Header="Hours+" Background="{ThemeResource PhoneAccentBrush}">
            <HubSection x:Name="sctnAddHours" Header="Add hours" ContentTemplate="{StaticResource DataTemplate1}"/>
            <HubSection x:Name="sctnAddExpenses" Header="Add expenses" ContentTemplate="{StaticResource DataTemplate2}"/>
            <HubSection x:Name="sctnWage" Header="Wage" Height="580" ContentTemplate="{StaticResource DataTemplate3}"/>
        </Hub>

    </Grid>

Answer 1

使用您要访问的控件的Loaded事件，并将其分配给这样的局部变量。

XAML

<AppBarButton x:Name="abtnAddHours" Loaded="abtnAddHours_Loaded" HorizontalAlignment="Left" Icon="Add" Label="" Margin="118,65,0,0" VerticalAlignment="Top" />

背后的代码

//local variable
private TextBlock _abtnAddHours;
//Loaded event of the TextBlock from the template
private void abtnAddHours_Loaded(object sender, RoutedEventArgs e)
{
    _abtnAddHours = (TextBlock)sender;
    //Add the event handler for the Click event
    _abtnAddHours.Click += _abtnAddHours_Click;
}

private void _abtnAddHours_Click(object sender, RoutedEventArgs e)
{
    //Put your logic here
}

如何访问集线器部分数据模板Windows Phone 8.1中的控件

1 个答案: