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C# 基于xml数据的文本块wpf显示_C#_Xml_Wpf_Xaml_Listbox - Fatal编程技术网

C# 基于xml数据的文本块wpf显示

C# 基于xml数据的文本块wpf显示,c#,xml,wpf,xaml,listbox,C#,Xml,Wpf,Xaml,Listbox,我正在开发一种存储之类的东西,在那里我阅读RSS提要并在列表框中显示其内容。RSS提要包含其他数据(例如“下载”或“自定义类别”),我使用(或希望使用)这些数据对列表框的结果进行排序。列表框如下所示: <ListBox Grid.Column="2" HorizontalAlignment="Stretch" Name="ItemsListParent" VerticalAlignment="Stretch" Margin="0,25,0,0"> <I

我正在开发一种存储之类的东西,在那里我阅读RSS提要并在列表框中显示其内容。RSS提要包含其他数据(例如“下载”或“自定义类别”),我使用(或希望使用)这些数据对列表框的结果进行排序。列表框如下所示:

<ListBox  Grid.Column="2" HorizontalAlignment="Stretch" Name="ItemsListParent" VerticalAlignment="Stretch" Margin="0,25,0,0">
            <ItemsControl Name="ItemsList" ItemsSource="{Binding Source={StaticResource rssData}}">
            <ItemsControl.ItemTemplate>
                <DataTemplate> 
                    <StackPanel Name="itemElement" Orientation="Horizontal" Loaded="itemElement_Loaded">
                        <StackPanel.Background>
                            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                                <GradientStop Color="White" Offset="0.15" />
                                <GradientStop Color="LightGray" Offset="0.85" />
                                <GradientStop Color="White" Offset="1" />
                            </LinearGradientBrush>
                        </StackPanel.Background>

                        <!--<Image Width="15" Margin="2" Source="{Binding XPath=url, Path=InnerText}"/>-->
                        <!--<TextBlock Margin="2" FontSize="16" VerticalAlignment="Center" Text="{Binding XPath=title}" FontWeight="Normal">
                            <Hyperlink Name="lnkGoToArticle" Tag="{Binding XPath=link, Path=InnerText}" Click="lnkGoToArticle_Click">
                                >>
                            </Hyperlink>
                            <Button Name="lnkDownload" Tag="{Binding XPath=download, Path=InnerText}" Style="{DynamicResource NoChromeButton}" Click="lnkDownload_Click">
                                <Image Source="Images/download31.png" Name="DownloadIcon" Width="30" Height="30" />
                            </Button>
                        </TextBlock>-->
                    </StackPanel>

                </DataTemplate>
            </ItemsControl.ItemTemplate>
            </ItemsControl>
        </ListBox>
但是它完成了整个列表框(与之前在wpf代码中一样)而无需重复调用我想为排序添加某种条件,比如if(xmldp.idonknowtheExactName==selectedCategory){显示文本块}或者{不显示它并转到XML中的下一项},但我真的不知道如何做。请对我耐心,因为我是WPF的新手,这也是我的第一个问题。如果你没有真正实现我的目标,下面是一个简单的列表:

1) 我想加载XML并在ItemsList中显示它的所有项

2) 我想在列表框中选择一个名为categoriesList的项目,并基于选择更新项目列表,以仅显示其customCategory==已选择的项目(selected是一个字符串,将根据categoriesList选择进行更新)

问题是,我不知道把条件放在哪里,也不知道它应该是什么样子,甚至不知道它是否可能

希望你能理解,并能帮助我


谢谢你的回答;)Andy

好吧,忘了通过代码构建视图吧,WPF不是这样工作的。返回到原始xaml模板

现在的问题是要对
ItemsControl
中的项进行排序和筛选。为此,您需要基于rssFeed将
ItemsControl
ItemsSource
绑定到
CollectionView
,而不是绑定到rssFeed本身

CollectionView
允许您轻松对集合进行排序和筛选

顺便说一下,您的XAML中似乎有一个冗余的
列表框。它没有做任何事情,因为您在它里面声明了一个
ItemsControl
<代码>列表框
已从
项控件
派生。
如果您想要滚动条,那么只需使用
列表框

是,如果您确实想要,可以通过代码进行构造,但它破坏了使用WPF的目的,WPF的目的是方便地用XAML表示并绑定到基础数据。它将表示与数据分开,因此如果需要,可以对相同的数据应用完全不同的GUI。了解一下MVVM,它可以很好地保持这种划分。非常感谢,我一定会尝试的!:)
<!-- -->     
void UpdateListBox()
    {
        ItemsList.Items.Clear();

        selected = (string)CategoriesList.SelectedItem;
        //if (selected==xmldp

        /*System.Xml.XmlDocument data = new System.Xml.XmlDocument();
        data.Load(@"http://www.andystore.bluefile.cz/?feed=rss2");
        xmldp.Document = data;
        xmldp.XPath = "//item";*/


        Thickness mrg = new Thickness();
        mrg.Left = 2;
        mrg.Right = 2;
        mrg.Top = 2;
        mrg.Bottom = 2;
        TextBlock itemTitle=new TextBlock();
        itemTitle.Margin=mrg;
        itemTitle.FontSize=16;
        itemTitle.VerticalAlignment = VerticalAlignment.Center;
        itemTitle.Text = "{Binding XPath=title}";
        itemTitle.FontWeight = FontWeights.Normal;
        itemTitle.Name="itemTitle";
        Binding itemTitleBinding=new Binding();
        itemTitleBinding.XPath="title";
        itemTitle.SetBinding(TextBlock.TextProperty,itemTitleBinding);

        itemElement.Children.Add(itemTitle);
        itemElement.RegisterName(itemTitle.Name, itemTitle);

        Label gta = new Label();
        Hyperlink goToArticle = new Hyperlink();
        goToArticle.Click += new RoutedEventHandler(lnkGoToArticle_Click);
        goToArticle.Inlines.Add(@">>");
        Binding goToArticleBinding = new Binding();
        goToArticleBinding.Path = new PropertyPath("InnerText");
        goToArticleBinding.XPath = "link";
        goToArticle.SetBinding(Hyperlink.TagProperty, goToArticleBinding);
        gta.Content = goToArticle;

        itemElement.Children.Add(gta);
        itemElement.RegisterName(goToArticle.Name, goToArticle);

        Button downloadButton = new Button();
        downloadButton.Name = "lnkDownload";
        downloadButton.Cursor = Cursors.Hand;
        downloadButton.Click += new RoutedEventHandler(lnkDownload_Click);
        Binding downloadButtonBinding = new Binding();
        downloadButtonBinding.XPath = "download";
        downloadButtonBinding.Path = new PropertyPath("InnerText");
        downloadButton.SetBinding(Button.TagProperty, downloadButtonBinding);
        Style downloadButtonStyle = this.FindResource("NoChromeButton") as Style;
        downloadButton.Style = downloadButtonStyle;
        BitmapImage dbiBitmap = new BitmapImage();
        dbiBitmap.BeginInit();
        dbiBitmap.UriSource = new Uri("pack://application:,,,/AndyLaunchWPF;component/Images/download31.png");
        dbiBitmap.EndInit();
        Image dbi = new Image();
        dbi.Width = 30;
        dbi.Height = 30;
        dbi.Name = "downloadIcon";
        dbi.Source = dbiBitmap;
        downloadButton.Content = dbi;

        itemElement.Children.Add(downloadButton);
        itemElement.RegisterName(downloadButton.Name, downloadButton);

        //itemElement.Children.Add(dbi);
        //itemElement.RegisterName(dbi.Name, dbi);
    }