如何禁用lisbox项Wp8的虚拟化 [英] How to disable Virtualizing for lisbox item Wp8

问题描述

我无法禁用VirtualizingStackPanel的列表框下的Virtualizing属性。我只获得VirtualizationMode属性。
其实我需要在listbox.Tried下面获取checkbox元素。但是最合适的方法是我得到这里
，但我得到ItemContainerGenerator为null。
更多rnd后，我发现我需要设置IsVirtualizing = false来获取ItemContainerGenerator。
xaml is ::

 < ListBox x：Name =my_listGrid.Row =0> ; 
< ItemsControl.ItemTemplate> 
 < StackPanel Orientation =Horizo​​ntal> 
< CheckBox x：Name =cbx_stateTag ={Binding}/> 
< TextBlock x：Name =txt_stringText ={Binding}VerticalAlignment =CenterFontSize =34/> 
< / StackPanel> 
< / DataTemplate> 
< /ItemsControl.ItemTemplate> 
< / ListBox> 
  

我无法获取VirtualizingStackPanel.isvertualing属性。我试图获取cbx_state。

解决方案

我已经这样做了复选框从c​​＃
检查在Page1.xaml：

 < phone：PhoneApplicationPage 
x：Class =PhoneApp3.Page1
 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 =PortraitOrientation =Portrait
 mc：Ignorable =d
 shell：SystemTray.IsVisible =True> 
 
<！ -  LayoutRoot是放置所有页面内容的根网格 - > 
< Grid Background =AliceBlue> 
< ListBox x：Name =my_listHeight =200Grid.Row =0> 
< ItemsControl.ItemTemplate> 
< DataTemplate> 
< StackPanel Orientation =Horizo​​ntal> 
< CheckBox x：Name =cbx_stateTag ={Binding BindsDirectlyToSource = True}/> 
< TextBlock x：Name =txt_stringText ={Binding BindsDirectlyToSource = True}VerticalAlignment =CenterFontSize =34/& 
< / StackPanel> 
< / DataTemplate> 
< /ItemsControl.ItemTemplate> 
< / ListBox> 
< / Grid> $ page $。
 

 命名空间PhoneApp3 
 {
 public partial class Page1：PhoneApplicationPage 
 {
 public Page1 （）
 {
 InitializeComponent（）; 
 String [] names = {Virat，Rohit，Rahane，Umesh，Axar}; 
 my_list.ItemsSource = names; 
 this.Loaded + = Page1_Loaded; 
} 
 
 void Page1_Loaded（object sender，RoutedEventArgs e）
 {
 GetItemsRecursive（my_list）; 
} 
 
 private void GetItemsRecursive（DependencyObject lb）
 {
 var childrenCount = VisualTreeHelper.GetChildrenCount（lb）; 
 
 for（int i = 0; i< childrenCount; i ++）
 {
 var child = VisualTreeHelper.GetChild（lb，i）; 
 
 if（child是CheckBox）//特定/子控件
 {
 CheckBox targeted_element =（CheckBox）child; 
 
 targeted_element.IsChecked = true; 
 
 if（targeted_element.IsChecked == true）
 {
 
 return; 
} 
} 
 
 GetItemsRecursive（child）; 
} 
} 
} 
} 
  

I am not able to disable the Virtualizing property under VirtualizingStackPanel for listbox .I am only getting VirtualizationMode property. Actually i need to get checkbox element under listbox.Tried several methods but most appropriate ans i got here but i was getting ItemContainerGenerator as null. After more rnd i found that i need to set IsVirtualizing=false to get the ItemContainerGenerator . xaml is ::

<ListBox x:Name="my_list" Grid.Row="0">
            <ItemsControl.ItemTemplate >
                <DataTemplate >
                    <StackPanel Orientation="Horizontal" >
                        <CheckBox x:Name="cbx_state"  Tag="{Binding}"/>
                        <TextBlock x:Name="txt_string" Text="{Binding}" VerticalAlignment="Center" FontSize="34" />
                    </StackPanel>
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ListBox>

I am not able to get VirtualizingStackPanel.isvertualing property.I was trying to get cbx_state.

解决方案

I have done in this manner i got check box checked from c# In Page1.xaml:

 <phone:PhoneApplicationPage
x:Class="PhoneApp3.Page1"
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"
shell:SystemTray.IsVisible="True">

<!--LayoutRoot is the root grid where all page content is placed-->
<Grid Background="AliceBlue">
<ListBox x:Name="my_list" Height="200" Grid.Row="0">
    <ItemsControl.ItemTemplate >
        <DataTemplate >
            <StackPanel Orientation="Horizontal" >
                <CheckBox x:Name="cbx_state"  Tag="{Binding BindsDirectlyToSource=True}"/>
                    <TextBlock x:Name="txt_string" Text="{Binding BindsDirectlyToSource=True}" VerticalAlignment="Center" FontSize="34" />
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ListBox>
</Grid>

in page1.cs

namespace PhoneApp3
{
public partial class Page1 : PhoneApplicationPage
{
    public Page1()
    {
        InitializeComponent();
        String[] names = { "Virat", "Rohit", "Rahane", "Umesh", "Axar" };
        my_list.ItemsSource = names;
        this.Loaded += Page1_Loaded;
    }

    void Page1_Loaded(object sender, RoutedEventArgs e)
    {
        GetItemsRecursive(my_list);
    }

    private void GetItemsRecursive(DependencyObject lb)
    {
        var childrenCount = VisualTreeHelper.GetChildrenCount(lb);

        for (int i = 0; i < childrenCount; i++)
        {
            var child = VisualTreeHelper.GetChild(lb, i);

            if (child is CheckBox) // specific/child control 
            {
                CheckBox targeted_element = (CheckBox)child;

                targeted_element.IsChecked = true;

                if (targeted_element.IsChecked == true)
                {

                    return;
                }
            }

            GetItemsRecursive(child);
        }
    }
}
 }

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