HOW CAN I PRINT A CANVAS IN WPF?

Takeshi Okada

Total Post:89

Points:629
Posted by  Takeshi Okada
WPF 
WPF
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Hi mindstick!

I used these code in order to print out the UI. Printing out is working, but if the size of paper is over, the UI cuts off in the middle of a canvas.

Is there any possible way not to be cut off in the middle?

<--cs code-->

PrintDialog dialog = new PrintDialog();

dialog.PrintVisual(lst , "print");

<--Xaml -->

<ListView Name="lst">

    <Grid Name="grdPrint">

        <Grid.RowDefinitions>

            <RowDefinition />

            <RowDefinition />

        </Grid.RowDefinitions>

        <Canvas  Grid.Row="0"    >

           .......

        </Canvas>

        <HListBox x:Name="lstImage" ItemsSource="{Binding IMG, Mode=TwoWay}" Grid.Row="1" IsHitTestVisible="True">

            <HListBox.ItemTemplate>

                <DataTemplate>

                    <HImage Margin="0"  Width="590"  Height="590" Stretch="Fill" Source="{Binding IMG_PATH_NM, Converter={StaticResource StrUriConverter}}" Tag="{Binding IMG_PATH_NM}">

                    </HImage>

                </DataTemplate>

            </HListBox.ItemTemplate>

            <HListBox.ItemsPanel>

                <ItemsPanelTemplate>

                    <StackPanel Orientation="Vertical" HorizontalAlignment="Center"  IsHitTestVisible="True"/>

                </ItemsPanelTemplate>

            </HListBox.ItemsPanel>

        </HListBox>

    </Grid>

</ListView>

Thanks kin advance


  1. shreesh chandra shukla

    Post:105

    Points:735
    Re: How can I print a canvas in wpf?

    Hi!

    This method will print the canvas to PNG file.

    public void ExportToPNG(string imgpath, Canvas surface)

    {

        Uri path = new Uri(imgpath);

        if (path == null)

            return;

        Transform transform = surface.LayoutTransform;

        surface.LayoutTransform = null; 

        Size size = new Size(surface.Width, surface.Height);

        surface.Measure(size);

        surface.Arrange(new Rect(size));

        RenderTargetBitmap renderBitmap =

            new RenderTargetBitmap(

            (int)size.Width,

            (int)size.Height,

            96d,

            96d,

            PixelFormats.Pbgra32);

        renderBitmap.Render(surface);

        using (FileStream outStream = new FileStream(path.LocalPath, FileMode.Create))

        {

            PngBitmapEncoder encoder = new PngBitmapEncoder();

            encoder.Frames.Add(BitmapFrame.Create(renderBitmap));

            encoder.Save(outStream);

        }

        surface.LayoutTransform = transform;

    }

    thanks

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