如何使用XPath設置ListView控件的ItemSource

此問題有點棘手，因爲整個代碼是通過XSLT自動生成的。這意味着我必須面對一些限制（無CodeBehind等）如何使用XPath設置ListView控件的ItemSource

我成功生成了包含通過XSLT的ListView的XAML文件。 XAML文件還包含一個XMLDataProvider。數據源和提供者都很好，我只是不知道如何設置ListView ItemSource屬性的XPath。

這是我的數據源：

<RelatedContacts> 
     <Contact ShowsInterest="true"> 
      <Name>John</Name> 
      <Lastname>Doe</Lastname> 
     </Contact > 
     <Contact ShowsInterest="true"> 
      <Name>Max</Name> 
      <Lastname>Mustermann</Lastname> 
     </Contact > 
     <Contact ShowsInterest="true"> 
      <Name>Claire</Name> 
      <Lastname>Grube</Lastname> 
     </Contact > 
</RelatedContacts>

這是產生的ListView代碼段

<ListView ItemsSource="{Binding XPath=/Contact/RelatedContacts/*}" Name="listview1" DockPanel.Dock="Left, Right, Top, Bottom" Height="125" Background="White" Foreground="Black" Visibility="visible" BorderThickness="1,1,1,1" FontFamily="Tahoma" FontSize="9" FontStyle="Normal" TabIndex="0" IsTabStop="True"> 
     <ListView.View> 
     <GridView> 
      <GridViewColumn Header="Name" DisplayMemberBinding="{Binding XPath=../Contact/Name}" /> 
      <GridViewColumn Header="Lastname" DisplayMemberBinding="{Binding XPath=../Contact/Lastname}" /> 
     </GridView> 
     </ListView.View> 
    </ListView>

這個片段顯示第一項三次。（因爲數據源中有三個條目）我嘗試了很多其他組合，但無法找到可以使用XSLT生成的解決方案。這個例子但我不能用XSLT生成它：

<ListView ItemsSource="{Binding XPath=/Contact/RelatedContacts//Contact}" Name="listview1" DockPanel.Dock="Left, Right, Top, Bottom" Height="125" Background="White" Foreground="Black" Visibility="visible" BorderThickness="1,1,1,1" FontFamily="Tahoma" FontSize="9" FontStyle="Normal" TabIndex="0" IsTabStop="True"> 
    <ListView.View> 
    <GridView> 
     <GridViewColumn Header="Name" DisplayMemberBinding="{Binding XPath=Name}" /> 
     <GridViewColumn Header="Lastname" DisplayMemberBinding="{Binding XPath=Lastname}" /> 
    </GridView> 
    </ListView.View> 
</ListView>

如前所述，生成ListView。這裏談到其轉化與XSLT

<ListViewWrapper id="listview1" dock="Fill" text="" theme="" width="1078" height="125" backcolor="White" forecolor="Black" visible="True" mapNode="Contact\RelatedContacts" border-left="1" border-top="1" border-right="1" border-bottom="1" font-name="Tahoma" font-size="9" font-style="Regular"> 
    <TabIndex>0</TabIndex> 
    <TabStop>True</TabStop> 
    <Columns> 
     <Column title="Name" mapNode="Contact\Name" width="0" /> 
     <Column title="Lastname" mapNode="Contact\Lastname" width="0" /> 
    </Columns> 
    </ListViewWrapper>

當處理ListViewWrapper和創建XSLT處理器沒有關於列，因爲有更深層次的mapNode元素知識ListView的「源」片段。（我確信有一種方法，但我不知道該怎麼做。）此外，列還可以映射到不同的元素。

<Columns> 
    <Column title="Name" mapNode="Contact\Name" width="0" /> 
    <Column title="Lastname" mapNode="BusinessContact\Lastname" width="0" /> 
</Columns>

包裹起來，這是我儘量做到：

ItemsSource="{Binding XPath=/Contact/RelatedContacts//*}

然後

<GridViewColumn Header="Name" DisplayMemberBinding="{Binding XPath=Name}" />

顯示在ListView RelatedContacts的所有子元素，而無需顯式定義整個路徑。我正在尋找像佔位符之類的東西。沒有這個條件，它會看起來像XPath=/Contact/RelatedContacts//Contact。

對於那些興趣來了XSLT樣式表的一部分：

<!-- Transformiere ListViewWrapper zu ListView --> 
    <xsl:template match="ListViewWrapper"> 
    <xsl:element name="ListView"> 
     <xsl:attribute name="ItemsSource"> 
     <xsl:variable name="binding-path" select="./@mapNode"/> 
     <xsl:variable name="bindpath" select="translate($binding-path, '\','/')" /> 
     <xsl:value-of select="concat('{Binding XPath=/',$bindpath,'/*}')"/> 
     </xsl:attribute> 
     <xsl:apply-templates select="@*|*" mode="to-attr" /> 
     <xsl:element name="ListView.View"> 
     <xsl:apply-templates select="*" /> 
     </xsl:element> 
    </xsl:element> 
    </xsl:template> 

    <!-- ListView: Transformieren von Columns (Wrapper) zu GridView --> 
    <xsl:template match="Columns"> 
    <xsl:element name="GridView"> 
     <xsl:apply-templates select="*" /> 
    </xsl:element> 
    </xsl:template> 

    <!-- ListView: Transformieren von Column zu GridViewColumn --> 
    <xsl:template match="Column"> 
    <xsl:variable name="binding-path" select="./@mapNode"/> 
    <xsl:element name="GridViewColumn"> 
     <xsl:apply-templates select="@*" /> 
     <xsl:attribute name="Header"> 
     <xsl:value-of select="./@title" /> 
     </xsl:attribute> 
     <xsl:attribute name="DisplayMemberBinding"> 
     <xsl:variable name="bindpath" select="translate($binding-path, '\','/')" /> 
     <xsl:value-of select="concat('{Binding XPath=../',$bindpath,'}')"/> 
     </xsl:attribute> 
     <xsl:call-template name="listbox-width"/> 
    </xsl:element> 
    </xsl:template> 

    <!-- ListView: Setzen der Column width. Falls 0 dann nichts angeben (auto size) --> 
    <xsl:template match="width" name="listbox-width"> 
    <xsl:if test="./@width != 0"> 
     <xsl:attribute name="Width"> 
     <xsl:value-of select="./@width" /> 
     </xsl:attribute> 
    </xsl:if> 
    </xsl:template> 

    <!-- Ausschluss des ListView Width Attribut --> 
    <xsl:template match="ListViewWrapper/@width" 
       mode="to-attr" />

來源

2013-03-26 Joel

只是做正確的方式一個很有效！

<ListView ItemsSource="{Binding XPath=/Contact/RelatedContacts/*}" Name="listview1" DockPanel.Dock="Left, Right, Top, Bottom" Height="125" Background="White" Foreground="Black" Visibility="visible" BorderThickness="1,1,1,1" FontFamily="Tahoma" FontSize="9" FontStyle="Normal" TabIndex="0" IsTabStop="True"> 
     <ListView.View> 
     <GridView> 
      <GridViewColumn Header="Name" DisplayMemberBinding="{Binding XPath=Name}" /> 
      <GridViewColumn Header="Lastname" DisplayMemberBinding="{Binding XPath=Lastname}" /> 
      <GridViewColumn Header="Age" DisplayMemberBinding="{Binding XPath=Age}" /> 
      <GridViewColumn Header="Street" DisplayMemberBinding="{Binding XPath=Street}" /> 
      <GridViewColumn Header="City" DisplayMemberBinding="{Binding XPath=City}" /> 
      <GridViewColumn Header="Postal code" DisplayMemberBinding="{Binding XPath=PostalCode}" /> 
      <GridViewColumn Header="Country" DisplayMemberBinding="{Binding XPath=Country}" /> 
     </GridView> 
     </ListView.View> 
    </ListView>

來源

2013-03-26 15:02:52 Joel

如何使用XPath設置ListView控件的ItemSource

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