Application hanging when drawing a grid

[umlprog]

Normally

rootGrid.Draw(page, new PointF(0, 0), layoutFormat);

document.Save(stream);

will create Pdf document with 2 pages.

However if we add a Bitmap image (5000x5000px) inside a grid, application hangs on rootGrid.Draw and keeps creating pages without any bounds.

Breaking into during debugging periodically reveals following callstack, number of pages created after several minutes is > 8000!

mscorlib.dll!System.Collections.Generic.List.Contains(Syncfusion.Pdf.PdfPageBase item) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfSection.IndexOf(Syncfusion.Pdf.PdfPage page) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfDocumentPageCollection.IndexOf(Syncfusion.Pdf.PdfPage page) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfDocumentTemplate.IsEven(Syncfusion.Pdf.PdfPage page) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfDocumentTemplate.GetBottom(Syncfusion.Pdf.PdfPage page) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfSection.GetBottomIndentHeight(Syncfusion.Pdf.PdfDocument document, Syncfusion.Pdf.PdfPage page, bool includeMargins) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfSection.GetActualBounds(Syncfusion.Pdf.PdfDocument document, Syncfusion.Pdf.PdfPage page, bool includeMargins) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfSection.GetActualBounds(Syncfusion.Pdf.PdfPage page, bool includeMargins) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfPageLayer.InitializeGraphics(Syncfusion.Pdf.PdfPageBase page) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.PdfPageLayer.Graphics.get() Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.GetNextPage(Syncfusion.Pdf.Graphics.PdfLayoutFormat format) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.LayoutOnPage(Syncfusion.Pdf.Graphics.PdfLayoutParams param) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.LayoutInternal(Syncfusion.Pdf.Graphics.PdfLayoutParams param) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridCell.Draw(Syncfusion.Pdf.Graphics.PdfGraphics graphics, System.Drawing.RectangleF bounds, bool cancelSubsequentSpans) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.DrawRowWithBreak(ref Syncfusion.Pdf.Grid.PdfGridLayouter.RowLayoutResult result, Syncfusion.Pdf.Grid.PdfGridRow row, float height) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.DrawRow(Syncfusion.Pdf.Grid.PdfGridRow row) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.LayoutOnPage(Syncfusion.Pdf.Graphics.PdfLayoutParams param) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.LayoutInternal(Syncfusion.Pdf.Graphics.PdfLayoutParams param) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridCell.Draw(Syncfusion.Pdf.Graphics.PdfGraphics graphics, System.Drawing.RectangleF bounds, bool cancelSubsequentSpans) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.DrawRowWithBreak(ref Syncfusion.Pdf.Grid.PdfGridLayouter.RowLayoutResult result, Syncfusion.Pdf.Grid.PdfGridRow row, float height) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.DrawRow(Syncfusion.Pdf.Grid.PdfGridRow row) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.LayoutOnPage(Syncfusion.Pdf.Graphics.PdfLayoutParams param) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGridLayouter.LayoutInternal(Syncfusion.Pdf.Graphics.PdfLayoutParams param) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Grid.PdfGrid.Layout(Syncfusion.Pdf.Graphics.PdfLayoutParams param) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Graphics.PdfLayoutElement.Draw(Syncfusion.Pdf.PdfPage page, System.Drawing.RectangleF layoutRectangle, Syncfusion.Pdf.Graphics.PdfLayoutFormat format) Unknown

Syncfusion.Pdf.Base.dll!Syncfusion.Pdf.Graphics.PdfLayoutElement.Draw(Syncfusion.Pdf.PdfPage page, System.Drawing.PointF location, Syncfusion.Pdf.Graphics.PdfLayoutFormat format) Unknown

at reportProvider.Save()

I can't pinpoint what causes this hang.

We add image to a cell with

public void AddImage(Stream stream, float? width, float? height)

{

var bitmap = new PdfBitmap(stream);

float actualHeight = height ?? bitmap.Height;

actualHeight += this.cell.Style.CellPadding.Top + this.cell.Style.CellPadding.Bottom;

this.row.Height = Math.Max(this.row.Height, actualHeight);

float actualWidth = width ?? bitmap.Width;

actualWidth += this.cell.Style.CellPadding.Left + this.cell.Style.CellPadding.Right;

this.grid.BeginCellLayout += BeginCellLayout;

this.cell.Style.BackgroundImage = bitmap;

// Event handler to reposition and fit image into a cell

void BeginCellLayout(object sender, PdfGridBeginCellLayoutEventArgs args)

{

if (args.CellIndex == this.parentColumn.Index && args.Style.BackgroundImage != null)

{

PdfImage backgroundOriginalImage = args.Style.BackgroundImage;

var bWidth = actualWidth - this.cell.Style.CellPadding.Left - this.cell.Style.CellPadding.Right;

var bHeight = actualHeight - this.cell.Style.CellPadding.Top - this.cell.Style.CellPadding.Bottom;

var x = args.Bounds.X + GetPosition(this.cell.Style.CellPadding.Left, this.cell.Style.CellPadding.Right, args.Bounds.Width, bWidth, (int)this.hAlign.GetValueOrDefault(VHorizontalAlignment.Left));

var y = args.Bounds.Y + GetPosition(this.cell.Style.CellPadding.Top, this.cell.Style.CellPadding.Bottom, args.Bounds.Height, bHeight, (int)this.vAlign);

args.Graphics.DrawImage(backgroundOriginalImage, new RectangleF(x, y, bWidth, bHeight));

args.Style.BackgroundImage = null;

}

}

}

[Surya Venkatesan]

Hi umlprog,

We have ensured to draw a grid with test images on the PDF document. It is working properly without any hanging issues. We request to try with the following KB documentation code snippet based on your requirement,

To draw the background picture in PDF table cell: https://www.syncfusion.com/kb/9807/how-to-draw-the-background-picture-in-pdf-table-cell-using-c-and-vb-net

To add image and text in the PDF table cell: https://www.syncfusion.com/kb/9675/how-to-add-image-and-text-in-the-pdf-table-cell-using-c-and-vb-net

To add multiple images in the PDF table cell: https://www.syncfusion.com/kb/9746/how-to-add-two-images-in-one-pdf-table-cell-using-c-and-vb-net

If the above KB documentation code snippet did not resolve your issues, Kindly revert us with the modified sample or complete code snippet with the input image to replicate the reported issue to analyze further and provide a precise solution on this.

Regards,

Surya V

[umlprog]

It happened with 5000x5000 test image.

[Gowthamraj Kumar]

Hi umlprog, 

We request you to share the particular 5000x5000 test image, replication sample with complete code snippet to reproduce the reported issue on our end, so that it will helpful for us. 

Regards 

Gowthamraj K