Как визуализировать большой список элементов в RenderTargetBitmap? - PullRequest
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Как визуализировать большой список элементов в RenderTargetBitmap?

1 голос
/ 03 апреля 2019

Я пытаюсь визуализировать представление списка, используя RenderTargetBitmap. Код ниже отображает только одну страницу. Он не добавляет страницы в загруженный PDF в соответствии с представлением списка. Этот код делает снимок того, что показано на странице, но не весь список. Я перешел по этой ссылке: Преобразование XAML в PDF

Это мой код файла: 

using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Graphics.Display;
using Windows.Graphics.Imaging;
using Windows.Storage;
using Windows.Storage.Pickers;
using Windows.UI.Popups;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Media.Imaging;
using Windows.UI.Xaml.Navigation;


namespace XAMLtoPDF_Sample
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
    public class ItemsListPDF
    {
        public string CarrierName { get; set; }
        public string PackageID { get; set; }
        public int Bill { get; set; }
        public string Location { get; set; }
        public string ItemType { get; set; }
        public string Quantity { get; set; }
        public string DeliverTo { get; set; }
        public string Sender { get; set; }
        public string CreationDate { get; set; }
        public string PONumber { get; set; }
        public string ControlNumber { get; set; }
    }
    public MainPage()
    {
        this.InitializeComponent();
        var item1 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item2 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item3 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item4 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item5 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item6 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item7 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item8 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item9 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item10 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item11 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var item12 = new ItemsListPDF { CarrierName = "asdasd", PackageID = "erwerwer", Bill = 1, Location = "er wrrty", ItemType = "xcvxcv", Quantity = "4", DeliverTo = "kiran", Sender = "tushar", CreationDate = "12/12/19", PONumber = "1", ControlNumber = "1" };
        var itemsList = new List<ItemsListPDF>();
        itemsList.Add(item1);
        itemsList.Add(item1);
        itemsList.Add(item2);
        itemsList.Add(item3);
        itemsList.Add(item4);
        itemsList.Add(item5);
        itemsList.Add(item6);
        itemsList.Add(item7);
        itemsList.Add(item8);
        itemsList.Add(item9);
        itemsList.Add(item10);
        itemsList.Add(item11);
        itemsList.Add(item12);
        PDFItemsList.ItemsSource = itemsList;
    }
    private async void button_Click(object sender, RoutedEventArgs e)
    {

        //Creating new PDF Document

        PdfDocument document = new PdfDocument();

        //Initializing to render to Bitmap
        var logicalDpi = DisplayInformation.GetForCurrentView().LogicalDpi;
        var renderTargetBitmap = new RenderTargetBitmap();

        //Create the Bitmpap from xaml page
        await renderTargetBitmap.RenderAsync(SyncfusionForm);
        var pixelBuffer = await renderTargetBitmap.GetPixelsAsync();

        //Save the XAML in Bitmap image
        using (var stream = new Windows.Storage.Streams.InMemoryRandomAccessStream())
        {
            var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
            encoder.SetPixelData(
                BitmapPixelFormat.Bgra8,
                BitmapAlphaMode.Ignore,
                (uint)renderTargetBitmap.PixelWidth,
                (uint)renderTargetBitmap.PixelHeight,
                logicalDpi,
                logicalDpi,
                pixelBuffer.ToArray());

            await encoder.FlushAsync();

            //Load and draw the Bitmap image in PDF
            PdfImage img = PdfImage.FromStream(stream.AsStream());
            if (img.Width > img.Height)
                document.PageSettings.Orientation = PdfPageOrientation.Portrait;
            else
                document.PageSettings.Orientation = PdfPageOrientation.Landscape;
            var section = document.Sections.Add();
            section.PageSettings.Size = new SizeF(img.Width, img.Height);

            PdfPage page = section.Pages.Add();
            page.Graphics.DrawImage(img, new RectangleF(0, 0, img.Width, img.Height));
        }

        //Save the Pdf document
        MemoryStream docStream = new MemoryStream();
        document.Save(docStream);
        document.Close(true);
        Save(docStream, "Sample.pdf");

    }

    #region Helper Methods
    async void Save(MemoryStream stream, string filename)
    {

        stream.Position = 0;
        StorageFile stFile;
        if (!(Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons")))
        {
            FileSavePicker savePicker = new FileSavePicker();
            savePicker.DefaultFileExtension = ".pdf";
            savePicker.SuggestedFileName = "Sample";
            savePicker.FileTypeChoices.Add("Adobe PDF Document", new List<string>() { ".pdf" });
            stFile = await savePicker.PickSaveFileAsync();
        }
        else
        {
            StorageFolder local = Windows.Storage.ApplicationData.Current.LocalFolder;
            stFile = await local.CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);
        }

        if (stFile != null)
        {
            Windows.Storage.Streams.IRandomAccessStream fileStream = await stFile.OpenAsync(FileAccessMode.ReadWrite);
            Stream st = fileStream.AsStreamForWrite();
            st.SetLength(0);
            st.Write((stream as MemoryStream).ToArray(), 0, (int)stream.Length);
            st.Flush();
            st.Dispose();
            fileStream.Dispose();
            MessageDialog msgDialog = new MessageDialog("Do you want to view the Document?", "File created.");
            UICommand yesCmd = new UICommand("Yes");
            msgDialog.Commands.Add(yesCmd);
            UICommand noCmd = new UICommand("No");
            msgDialog.Commands.Add(noCmd);
            IUICommand cmd = await msgDialog.ShowAsync();
            if (cmd == yesCmd)
            {
                // Launch the retrieved file
                bool success = await Windows.System.Launcher.LaunchFileAsync(stFile);
            }
        }


    }
    #endregion
}

}

Это код Xaml: 

<Page
x:Class="XAMLtoPDF_Sample.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:XAMLtoPDF_Sample"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">

<Grid x:Name="SyncfusionForm" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <!--<TextBlock Text="First Name&#xA;" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="64,91,0,0" RenderTransformOrigin="-3.711,-1.5" Width="130" Foreground="#FF1038EC" Height="30"/>
    <TextBlock Text="Last Name" HorizontalAlignment="Left" VerticalAlignment="Top" RenderTransformOrigin="1.842,4.5" Margin="64,128,0,0" Foreground="#FF1038EC"/>
    <TextBox HorizontalAlignment="Left" Height="20" TextWrapping="Wrap" VerticalAlignment="Top" Width="212" Margin="293,128,0,0" RenderTransformOrigin="0.351,0.761"/>
    <TextBox HorizontalAlignment="Left" Height="20" TextWrapping="Wrap" VerticalAlignment="Top" Width="211" Margin="292,91,0,0"/>
    <TextBlock Text="Email" HorizontalAlignment="Left" VerticalAlignment="Top" RenderTransformOrigin="1.395,6" Margin="64,163,0,0" Foreground="#FF1038EC"/>
    <TextBlock Text="Mobile No&#xA;" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="64,200,0,0" Width="84" Foreground="#FF1038EC" RenderTransformOrigin="0.637,0.548" Height="30"/>
    <TextBox HorizontalAlignment="Left" Height="20" TextWrapping="Wrap" VerticalAlignment="Top" Width="211" Margin="292,205,0,0"/>
    <TextBox HorizontalAlignment="Left" Height="20" TextWrapping="Wrap" VerticalAlignment="Top" Width="211" Margin="294,165,0,0" />
    <TextBlock Text="Education Grade&#xA;" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="51,295,0,0" Width="120" Foreground="#FFAA0909" RenderTransformOrigin="0.439,-0.619" Height="26"/>
    <TextBlock Text="General Information" HorizontalAlignment="Left" VerticalAlignment="Top" RenderTransformOrigin="2.211,2.346" Margin="51,65,0,0" Foreground="#FFAA0909" Width="156"/>
    <TextBlock Text="Highest Qualification" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="51,335,0,0" RenderTransformOrigin="0.842,-1.231" Foreground="#FF1038EC"/>
    <CheckBox Content="Post Graduate" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="64,406,0,0" Foreground="#FF1038EC" RenderTransformOrigin="0.5,0.5" Height="20" Width="126">
    </CheckBox>
    <CheckBox Content="College" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="367,370,0,0" Foreground="#FF1038EC" Width="95" Height="24"/>
    <CheckBox Content="Bachelor degree" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="236,370,0,0" Foreground="#FF1038EC" Height="24" Width="125"/>
    <CheckBox Content="Associate degree" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="64,370,0,0" Width="143"  Foreground="#FF1038EC" Height="24"/>
    <CheckBox Content="MBA" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="237,411,0,0"  Foreground="#FF1038EC" RenderTransformOrigin="-0.75,0.503" Height="26" Width="62">
    </CheckBox>-->
    <Button x:Name="button" Click="button_Click" Content="Submit" HorizontalAlignment="Center" VerticalAlignment="Top" Height="31"/>
    <ListView Grid.Row="1" x:Name="PDFItemsList" Height="Auto" VerticalAlignment="Top" Margin="0,40,0,0" Foreground="Black" Background="White" Visibility="Visible" IsItemClickEnabled="False">
        <ListView.ItemContainerStyle>
            <Style TargetType="ListViewItem">
                <Setter Property="BorderThickness" Value="0,0,0,1" />
                <Setter Property="BorderBrush" Value="Black"/>
                <Setter Property="Foreground" Value="Black"/>
            </Style>
        </ListView.ItemContainerStyle>
        <ListView.ItemTemplate>
            <DataTemplate>
                <ContentControl>
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                        </Grid.ColumnDefinitions>
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition/>
                                <RowDefinition/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
                            <TextBlock Text="{Binding CarrierName}" Foreground="Black" Margin="20,20,0,0"/>
                            <TextBlock Text="{Binding PackageID}" Foreground="Black" Grid.Row="1" Margin="20,20,0,0"/>
                            <TextBlock Text="{Binding Bill}" Foreground="Black" Grid.Row="2" Margin="20,20,0,0"/>
                        </Grid>
                        <Grid Grid.Column="1">
                            <Grid.RowDefinitions>
                                <RowDefinition/>
                                <RowDefinition/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
                            <TextBlock Text="{Binding Location}" Foreground="Black" Margin="20,20,0,0"/>
                            <TextBlock Text="{Binding ItemType}" Foreground="Black" Grid.Row="1" Margin="20,20,0,0"/>
                            <TextBlock Text="{Binding Quantity}" Foreground="Black" Grid.Row="2" Margin="20,20,0,0"/>
                        </Grid>
                        <Grid Grid.Column="2" HorizontalAlignment="Right">
                            <Grid.RowDefinitions>
                                <RowDefinition/>
                                <RowDefinition/>
                                <RowDefinition/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
                            <TextBlock Text="{Binding DeliverTo}" HorizontalAlignment="Right" Foreground="Black" Margin="20,20,0,0"/>
                            <TextBlock Text="{Binding Sender}" HorizontalAlignment="Right" Foreground="Black" Grid.Row="1" Margin="20,20,0,0"/>
                            <TextBlock Text="" Foreground="Black" HorizontalAlignment="Right" Grid.Row="2" Margin="20,20,0,0"/>
                            <TextBlock Text="Signature" HorizontalAlignment="Right" Foreground="Black" FontWeight="ExtraLight" Grid.Row="3" Margin="20,20,0,0"/>
                        </Grid>
                        <Grid Grid.Column="3" HorizontalAlignment="Right">
                            <Grid.RowDefinitions>
                                <RowDefinition/>
                                <RowDefinition/>
                                <RowDefinition/>
                                <RowDefinition/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
                            <TextBlock Text="{Binding CreationDate}" HorizontalAlignment="Right" Foreground="Black" Margin="20,20,0,0"/>
                            <TextBlock Text="{Binding PONumber}" HorizontalAlignment="Right" Grid.Row="1" Foreground="Black" Margin="20,20,0,0"/>
                            <TextBlock Text="{Binding ControlNumber}" HorizontalAlignment="Right" Grid.Row="2" Foreground="Black" Margin="20,20,0,0"/>
                            <TextBlock Text="" Foreground="Black" Grid.Row="3" Margin="20,20,0,0"/>
                            <TextBlock Text="Print Name Here" HorizontalAlignment="Right" Foreground="Black" FontWeight="ExtraLight" Grid.Row="4" Margin="20,20,0,0"/>
                        </Grid>
                    </Grid>
                </ContentControl>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</Grid>

Заранее спасибо.

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