Possible Memory Leak in C1PdfViewer

Possible Memory Leak in C1PdfViewer

Posted by: tobias.heilmannseder on 7 September 2018, 12:45 am EST

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  tobias.heilmannseder

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  Posted 7 September 2018, 12:45 am EST

  When I make a really small Wpf Application with only one C1PdfViewer Control it is using huge amounts of memory when I scroll pages.
  
  See attached solution.

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  tobias.heilmannseder

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  Posted 7 September 2018, 12:47 am EST

  <Window
      x:Class="PdfViewerMemoryLeak.MainWindow"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:c1="http://schemas.componentone.com/winfx/2006/xaml"
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
      xmlns:local="clr-namespace:PdfViewerMemoryLeak"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
      Title="MainWindow"
      Width="800"
      Height="450"
      mc:Ignorable="d">
      <Grid>
          <c1:C1PdfViewer
              x:Name="C1PdfViewer"
              Focusable="True"
              Loaded="PdfHelpViewer_OnLoaded"
              OpenButtonVisibility="Visible"
              ToolbarVisibility="Visible"
              Visibility="Visible" />
      </Grid>
  </Window>
  

  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Threading.Tasks;
  using System.Windows;
  using System.Windows.Controls;
  using System.Windows.Data;
  using System.Windows.Documents;
  using System.Windows.Input;
  using System.Windows.Media;
  using System.Windows.Media.Imaging;
  using System.Windows.Navigation;
  using System.Windows.Shapes;
  using C1.WPF.PdfViewer;
  
  namespace PdfViewerMemoryLeak
  {
      /// <summary>
      /// Interaction logic for MainWindow.xaml
      /// </summary>
      public partial class MainWindow : Window
      {
          public MainWindow()
          {
              InitializeComponent();
          }
  
          private void PdfHelpViewer_OnLoaded(object sender, RoutedEventArgs e)
          {
              if (sender is C1PdfViewer c1PdfViewer && c1PdfViewer.IsVisible)
              {
                  c1PdfViewer.ViewMode = ViewMode.FitWidth;
                  c1PdfViewer.LoadDocument(@"..\..\made-with-cc.pdf");
              }
          }
      }
  }
  
  

• 

  Ruchir.Agarwal

  

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  Posted 9 September 2018, 3:45 pm EST - Updated 4 October 2022, 12:14 am EST

  Hello,

  Thank you for sharing the code snippets. I am able to reproduce the issue at my end.
  
  Could you please try loading your PDF using the C1FlexView/C1PdfDocumentSource controls. For this, I would suggest to use the product sample installed at \Documents\ComponentOne Samples\WPF\C1.WPF.Document\CS\PdfView location and verify the behavior at your end.
  
  I would also suggest you to move your application to use C1PdfDocumentSource which should work fine. Please refer attached video.

  Thanks,
  
  Ruchir