固定页面中的WPF复选框状态不会更新

时间:2012-11-13 19:40:12

标签: wpf checkbox fixeddocument

我试图基于在WPF中用作模板的FixedPage元素导出一些数据,我似乎在更新复选框的值时遇到了问题。奇怪的是我在模板中也使用了Textblocks和Textboxes,但这些更新内容没有问题。

所以...从一开始。我要导出的数据位于一个名为RepairStatement的类中,该类允许使用printForm函数打印到自定义xps文件。

    public class RepairStatement
{
    // Variables
    public bool hasKulanz { get; set; }
    public bool hasRepair { get; set; }
    public Client client { get; set; }

    /// <summary>
    /// Export repair statement to XPS file. 
    /// </summary>
    /// <param name="file">output xps file</param>
    public void printForm(string file)
    {
        string printTemplateRepairStatementPath = "Print Templates\\RepairStatement.xaml";

        // Define general purpose handlers to be used in browsing the print templates
        FileStream fileStream;

        if (!File.Exists(file))
        {
            FileStream newfile = File.Create(file);
            newfile.Close();
        }

        // Check that all xaml templates exist
        if (!File.Exists(printTemplateRepairStatementPath))
        {
            throw new ArgumentNullException(printTemplateRepairStatementPath, 
                "Repair Statement print template is not available. Check file source");
        }

        FixedDocument doc = new FixedDocument();
        // A4 Standard: 8.27 x 11.69 inch; 96 dpi
        Size documentSize = new Size(96 * 8.27, 96 * 11.69);
        doc.DocumentPaginator.PageSize = documentSize;

        // 1. Reparatur-Bericht
        //  a. Open the filestream
        try
        {
            fileStream = new FileStream(printTemplateRepairStatementPath, FileMode.Open);
        }
        catch (Exception e)
        {
            throw new ArgumentNullException(LoginAgent.userSerializationPath,
                "Repair Statement print template could not be open due to " + e.Message);
        }

        //  b. Read the XAML tree
        FixedPage fixedPage = XamlReader.Load(fileStream) as FixedPage;

        //  c. Set the data
        (fixedPage.FindName("receiptAddress") as TextBox).Text = client.receiptAddress; // Works
        (fixedPage.FindName("deliveryAddress") as TextBox).Text = client.deliveryAddress;// Works
        (fixedPage.FindName("hasEndorser") as CheckBox).IsChecked = true;  // Has no effect

        //  d. Set the page size
        fixedPage.Width = doc.DocumentPaginator.PageSize.Width;
        fixedPage.Height = doc.DocumentPaginator.PageSize.Height;

        // Add to document
        PageContent pageContent = new PageContent();
        ((IAddChild)pageContent).AddChild(fixedPage);
        doc.Pages.Add(pageContent);

        // Convert to XPS
        XpsDocument xpsDocument = new XpsDocument(file, FileAccess.Write);
        XpsDocumentWriter documentWriter = XpsDocument.CreateXpsDocumentWriter(xpsDocument);
        documentWriter.Write(doc);
        xpsDocument.Close();
    }
}

我使用的xaml模板如下所示:

<FixedPage xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
       Name="RepairStatementFixedPage"
       Background="White"
       Width="793.92" Height="1122.24" VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
<Border Name="bigPage" BorderThickness="1" BorderBrush="#FFCB9999" Width="793.92" Height="1122.24" 
        HorizontalAlignment="Center" VerticalAlignment="Center">
  <Border Name="content" Margin="96, 96">
    <DockPanel LastChildFill="False">
        <Grid DockPanel.Dock="Top" Name="title">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="120" />
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="120" />
          </Grid.ColumnDefinitions>
          <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="10" />
            <RowDefinition Height="*" />
          </Grid.RowDefinitions>
            <Image Grid.Column="0" Grid.RowSpan="3" Width="120" 
              Source="/DesktopLibrarian;component/Content/lib-bg.jpg"
              VerticalAlignment="Top" HorizontalAlignment="Left" />
            <TextBlock Grid.Column="1" Grid.RowSpan="3" HorizontalAlignment="Center" VerticalAlignment="Bottom" 
              TextBlock.FontSize="23">
              Reparaturbericht
            </TextBlock>
            <TextBlock Grid.Column="2" Grid.Row="0" Grid.RowSpan="3" 
              VerticalAlignment="Top" HorizontalAlignment="Right" Name="repairNumber">
              TEST
            </TextBlock>
        </Grid>
        <Border DockPanel.Dock="Top" Height="20" />
        <Grid DockPanel.Dock="Top" Name="deviceInfo">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
          </Grid.ColumnDefinitions>
          <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
          </Grid.RowDefinitions>
        </Grid>

        <!-- Client information --> 
        <GroupBox DockPanel.Dock="Top" Header="Kundeninformationen">
          <Grid Margin="3">
            <Grid.ColumnDefinitions>
              <ColumnDefinition Width="130" />
              <ColumnDefinition Width="3" />
              <ColumnDefinition Width="110" />
              <ColumnDefinition Width="8" />
              <ColumnDefinition Width="*" />
              <ColumnDefinition Width="8" />
              <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
              <RowDefinition Height="Auto" />
              <RowDefinition Height="Auto" />
              <RowDefinition Height="Auto" />
              <RowDefinition Height="Auto" />
              <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>

            <!-- Name -->
            <TextBlock Grid.Column="0" Grid.ColumnSpan="3" Grid.Row="0" Name="clientName" 
              TextBlock.FontWeight="Bold">
              TEST
            </TextBlock>

            <!-- Phone Number -->
            <TextBlock Grid.Column="0" Grid.Row="2">Telefonnummer:</TextBlock>
            <TextBlock Grid.Column="2" Grid.Row="2" Name="phoneNumber">TEST</TextBlock>

            <!-- Auftragsnummer -->
            <TextBlock Grid.Column="0" Grid.Row="3">Auftragsnummer (RMA):</TextBlock>
            <TextBlock Grid.Column="2" Grid.Row="3" Name="orderNumber">TEST</TextBlock>

            <!-- Receipt Address -->
            <TextBlock Grid.Column="4" Grid.Row="1">Rechnungsadresse:</TextBlock>
              <TextBox Grid.Column="4" Grid.Row="2" Grid.RowSpan="2" Name="receiptAddress" BorderThickness="0"
                 AcceptsReturn="True" TextWrapping="Wrap">
                TEST
              </TextBox>

            <!-- Delivery Address -->
            <TextBlock Grid.Column="6" Grid.Row="1">Lieferadresse:</TextBlock>
              <TextBox Grid.Column="6" Grid.Row="2" Grid.RowSpan="2" Name="deliveryAddress" BorderThickness="0"
                 AcceptsReturn="True" TextWrapping="Wrap">
                TEST
              </TextBox>
          </Grid>
        </GroupBox>
        <Border DockPanel.Dock="Top" Height="20" />

        <!-- Device information -->
        <GroupBox DockPanel.Dock="Top" Header="Geräteinformationen">
          <Grid Margin="3">
            <Grid.ColumnDefinitions>
              <ColumnDefinition Width="90" />
              <ColumnDefinition Width="3" />
              <ColumnDefinition Width="150" />
              <ColumnDefinition Width="8" />
              <ColumnDefinition Width="*" />
              <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
              <RowDefinition Height="Auto" />
              <RowDefinition Height="Auto" />
              <RowDefinition Height="Auto" />
              <RowDefinition Height="Auto" />
              <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>

            <!-- Model -->
            <TextBlock Grid.Column="0" Grid.ColumnSpan="3" Grid.Row="0" Name="model" TextBlock.FontWeight="Bold">
              TEST
            </TextBlock>

            <!-- Repair -->
            <CheckBox Grid.Column="4" Grid.Row="1" Name="hasRepair">Reparatur</CheckBox>

            <!-- Device has endorser -->
            <CheckBox Grid.Column="4" Grid.Row="2" Name="hasEndorser">Endorsergerät</CheckBox>
          </Grid>
        </GroupBox>

    </DockPanel>
  </Border>
</Border>

问题出在printForm函数的这三行中:

            //  c. Set the data
        (fixedPage.FindName("receiptAddress") as TextBox).Text = client.receiptAddress;
        (fixedPage.FindName("deliveryAddress") as TextBox).Text = client.deliveryAddress;
        (fixedPage.FindName("hasEndorser") as CheckBox).IsChecked = true;

前两行正常修改文本框的内容。我也可以毫无问题地修改Textblocks的内容,但无论我尝试做什么,复选框的值都不会改变。我认为它与FixedPage或FixedDocument有关,但我无法理解问题可能是什么。如果我在XAML中设置IsChecked =“True”,则复选框将在最终的xps文档中显示为已选中,但类似地我无法取消选中它。

任何关于可能出现的问题的提示都将不胜感激。如果您知道有关FixedPage和FixedDocument的好教程或信息来源,我也很想看看它们,因为到目前为止我找到的文档至少可以说是谦虚。

谢谢!

更新: 我还在msdn论坛here上提出了这个问题,并在导出到xps之前得到了一些关于使用Measure(),Arrange和updatelayout()的提示。不幸的是,这个解决方案似乎不起作用。考虑到textblock和textbox元素的行为符合预期,我认为它本来是一个很远的镜头。我只有复选框的问题。

我决定制作一个显示错误的小项目,以便您也可以自己进行一些实验。你可以找到它here

如果你想出办法,请告诉我:D

2 个答案:

答案 0 :(得分:2)

我发现了问题,我也找到了解决方案的一些开端。

显式启用的复选框在导出到wpf时不会检查。我想开发人员在编写代码时的想法是,只能手动检查一张纸上的复选框。最不幸的是,我想以编程方式检查它们。

我也找到了解决这个问题的方法。已禁用的复选框显示为已选中且未选中。当然主要的缺点是它们都是灰色的,就像看起来像残疾复选框一样。

嗯......我想是时候弄清楚如何重新设置我的禁用复选框,看起来它们已经启用了。嗯....也许打印其中五个在彼此之上?手指交叉!

答案 1 :(得分:1)

RadioButtons也会出现同样的问题。我通过在打印前在PrintPreview窗口中显示我的FixedDocument来解决它(使用DocumentViewer)(链接:http://www.nbdtech.com/Blog/archive/2009/07/09/wpf-printing-part-4-ndash-print-preview.aspx)。

编辑:差不多半年后再回到这个问题。我的应用程序的要求发生了变化,我不得不实现静默打印,不再允许我使用上面提到的PrintPreview窗口解决方法。解决方案最终与另一个答案中提到的解决方案类似。我最终添加了自定义复选框/ radiobutton模板,并禁用了IsEnabled样式触发器。问题是找到Aero BulletChrome模板。以下问题在这方面有所帮助https://stackoverflow.com/a/24863563/1288473