WPF到Silverlight ItemContainerStyle的问题 [英] WPF to Silverlight ItemContainerStyle problem

问题描述

您好。在尝试从WPF中移植一些代码时，我正在努力解决Silverlight中的问题。我的ViewModel中有一个名为Fields的ObservableCollection，它绑定到ItemsControl的ItemsSource。 ItemsPanelTemplate设置为通过辅助类绑定的网格。问题在于ItemContainerStyle，它在Silverlight（5）中不起作用。

 <   ItemsControl     ItemsSource   =  {Binding Path = Fields} >  
 <   ItemsControl.ItemsPanel  >  
 <   ItemsPanelTemplate  >  
 <  网格    local：GridHelper.RowCount   =  {Binding Path = RowCount}    local：GridHelper.ColumnCount   =  {Binding Path = ColumnCount}  /  >  
 <   / ItemsPanelTemplate  >  
 <   / ItemsControl.ItemsPanel  >  
 <   ItemsControl.ItemContainerStyle  >  
 <  样式    TargetType   =  {x ：类型FrameworkElement} >  
 <   Setter    属性  =   Grid.Row   值  =  {Binding Row}  /  >  
 <   Setter    属性  =  Grid.Column <温泉n class =code-attribute>  值  =  {Binding Column}  /  >  
 <   / Style  >  
 <   / ItemsControl.ItemContainerStyle  >  
 <   / ItemsControl  >  

我是Silverlight的新手，希望这不是一个愚蠢的问题:)提前谢谢！

解决方案

1。 Silverlight对 Style.TargetType 属性有不同的语法，使用

  <   style     targettype   =  FrameworkElement >  < /   style  >  

（ Style.TargetType Property ）。



2.在Silverlight 5中添加了属性设置器中的绑定。因此，如果使用SL4，它将无法正常工作。



3. ItemsControl 上没有 ItemContainerStyle 属性。它存在于派生控件上，例如 ListBox 。如果您不需要某些特定于ListBox的行为（例如选择），请使用简化的 ListBoxItem 控件模板，例如：

 <  样式    TargetType   =  ListBoxItem >  
 < Setter  Property =Grid.RowValue ={绑定 行}/> 
 < Setter  Property =Grid.ColumnValue ={ Binding  列}/> 
 < Setter  Property =Horizo​​ntalAlignmentValue =Stretch/> 
 < Setter  Property =VerticalAlignmentValue =Stretch/> 
 < Setter  Property =Horizo​​ntalContentAlignmentValue =Stretch/> 
 < Setter  Property =VerticalContentAlignmentValue =Stretch/> 
 < Setter  Property =Template> 
 < Setter  .Value> 
 < ControlTemplate  TargetType =ListBoxItem> 
 < Grid  Background ={ TemplateBinding  背景}> 
 < ContentPresenter  x：Name =contentPresenter
 Content ={ TemplateBinding  内容}  
 ContentTemplate ={ TemplateBinding   ContentTemplate }  
 Horizo​​ntalAlignment ={ TemplateBinding   Horizo​​ntalContentAlignment }  
 Margin ={{span class =code-attribute> TemplateBinding  填充}/> 
 < /  网格 >  
 <   / ControlTemplate  >  
 <   / Setter.Value  >  
 <   / Setter  >  
 <   / Style  >  

Hi. I am struggling with something in silverlight while trying to port some code from WPF. I have an ObservableCollection in my ViewModel called Fields, which is bound to the ItemsSource of an ItemsControl. The ItemsPanelTemplate is set to a grid with bindings through a helper class. The problem is with the ItemContainerStyle, it does not work in Silverlight (5).

<ItemsControl ItemsSource="{Binding Path=Fields}">
                        <ItemsControl.ItemsPanel>
                            <ItemsPanelTemplate>
                                <Grid local:GridHelper.RowCount="{Binding Path=RowCount}" local:GridHelper.ColumnCount="{Binding Path=ColumnCount}"/>
                            </ItemsPanelTemplate>
                        </ItemsControl.ItemsPanel>
                        <ItemsControl.ItemContainerStyle>
                            <Style TargetType="{x:Type FrameworkElement}">
                                <Setter Property="Grid.Row" Value="{Binding Row}"/>
                                <Setter Property="Grid.Column" Value="{Binding Column}"/>
                            </Style>
                        </ItemsControl.ItemContainerStyle>
                    </ItemsControl>

I am new to Silverlight, hope it is not a dumb question :) Thanks in advance!

解决方案

1. Silverlight has different syntax for Style.TargetType property, use

<style targettype="FrameworkElement"></style>

(Style.TargetType Property).

2. Binding in the property setters has been added in Silverlight 5. So if you use SL4, it won''t work.

3. There is no ItemContainerStyle property on the ItemsControl. It exists on derived controls such as ListBox. If you don''t need some ListBox-specific behavior, such as selection, use simplified ListBoxItem control template, for example:

<Style TargetType="ListBoxItem">
     <Setter Property="Grid.Row" Value="{Binding Row}"/>
     <Setter Property="Grid.Column" Value="{Binding Column}"/>
     <Setter Property="HorizontalAlignment" Value="Stretch"/>
     <Setter Property="VerticalAlignment" Value="Stretch"/>     
     <Setter Property="HorizontalContentAlignment" Value="Stretch"/>                    
     <Setter Property="VerticalContentAlignment" Value="Stretch"/>                    
     <Setter Property="Template">
         <Setter.Value>
             <ControlTemplate TargetType="ListBoxItem">
                 <Grid Background="{TemplateBinding Background}">
                     <ContentPresenter x:Name="contentPresenter"
                           Content="{TemplateBinding Content}"
                           ContentTemplate="{TemplateBinding ContentTemplate}"
                           HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                           Margin="{TemplateBinding Padding}"/>
                 </Grid>
             </ControlTemplate>
         </Setter.Value>
     </Setter>
</Style>

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