在WPF中打印像超级市场票据之类的票据

Question

我想按照商品打印超级市场账单之类的冗长账单 我使用xps文档，但它们仅打印在xps文档的一页上显示的10种产品

我尝试了下面提到的代码

这是我的用户控件

<UserControl x:Class="BillingSystem.Views.forPrinting"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:local="clr-namespace:BillingSystem.Views"
         mc:Ignorable="d" 
          d:DesignWidth="1000">
<UserControl.Resources>
    <Style TargetType="TextBlock">            
        <Setter Property="FontSize" Value="35"/>
        <Setter Property="FontWeight" Value="Bold"/>
    </Style>
</UserControl.Resources>
<ScrollViewer>
<StackPanel>
    <TextBlock HorizontalAlignment="Center" FontFamily="times" Text="افضل سویٹس غلہ منڈی دینہ"/>
    <TextBlock HorizontalAlignment="Center" FontFamily="times" Text="PH:0544-631031"/>

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="1.8*"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>

        <TextBlock Text="Customer:" Grid.Column="0"/>
        <TextBlock x:Name="tb" Grid.Column="1"/>
        <TextBlock Text="Bill No:" Grid.Column="2"/>
        <TextBlock x:Name="bill" Grid.Column="3"/>
    </Grid>

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="2.5*"/>
        </Grid.ColumnDefinitions>

        <TextBlock Text="Items:" Grid.Column="0"/>
        <TextBlock x:Name="totalitems"  Grid.Column="1"/>
        <TextBlock Text="Date:" Grid.Column="2"/>
        <TextBlock x:Name="date" Grid.Column="3"/>
    </Grid>
    <DataGrid x:Name="dg" GridLinesVisibility="Horizontal" MinColumnWidth="140" FontWeight="Bold" FontSize="35"  BorderBrush="Gray" AreRowDetailsFrozen="True" CanUserReorderColumns="False" BorderThickness="2"  IsReadOnly="True"/>
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="3*"/>
            <ColumnDefinition Width="*"/>

        </Grid.ColumnDefinitions>

        <TextBlock Text="Total" FontWeight="Bold" Grid.Column="0"/>
        <TextBlock x:Name="total"  Grid.Column="1"/>            
    </Grid>
    <TextBlock Text="Thanku for your Visit" HorizontalAlignment="Center"/>
    </StackPanel>
</ScrollViewer>

这是我用于打印此用户控件的代码

forPrinting fp = new forPrinting();
                    // Configure save file dialog box
                    SaveFileDialog dlg = new SaveFileDialog();
                    dlg.FileName = txtBill.Text;  // Default file name
                    dlg.DefaultExt = ".xps"; // Default file extension
                    dlg.Filter = "XPS Documents (.xps)|*.xps"; // Filter files by extension
                    dlg.InitialDirectory = @"D:\Bills";

                    /*
                    if (File.Exists(dlg.FileName))
                    {
                        File.Delete(dlg.FileName);
                    }*/

                    // Show save file dialog box
                    Nullable<bool> result = dlg.ShowDialog();
                    // Process save file dialog box results
                    if (result == true)
                    {
                        // Save document
                        string filename = dlg.FileName;                            

                        //FixedDocument doc = (FixedDocument)fp.Document;
                        XpsDocument xpsd = new XpsDocument(filename, FileAccess.ReadWrite); 

                        XpsDocumentWriter xw = XpsDocument.CreateXpsDocumentWriter(xpsd);

                        xw.Write(fp);

                        xpsd.Close();
                    }


                    //Print
                    PrintDialog printDlg = new PrintDialog();
                    printDlg.ShowDialog();
                    printDlg.PrintVisual(fp, "Grid Printing.");

我想根据产品的不同来打印像超级市场打印账单一样的账单，可以是0-100，因此账单也要打印