Centering an image on pdf

Aspose.PDF Product Family
1

Hey there again,

I’ve converted an aspose.slides presentation to images using GetThumbnail, then i add these images to an Aspose.PDF object.

The image is rendered, but it does not fit to page but rather is placed and the edge is a bit cut.

Is there a way to centralize the image or fit it to the page?

this is the code I’m using :

//Loop over the worksheets collection
for (int index = 0; index < wrkExcel.Worksheets.Count; index++)
{
MemoryStream ms = new MemoryStream();
Worksheet worksheet = wrkExcel.Worksheets[index];
//Define ImageOrPrintOptions
ImageOrPrintOptions imgOptions = new ImageOrPrintOptions();
//Specify the image format
imgOptions.ImageFormat = System.Drawing.Imaging.ImageFormat.Bmp;
//Only one page for the whole sheet would be rendered
imgOptions.OnePagePerSheet = false;
imgOptions.IsImageFitToPage = false;
//Render the sheet with respect to specified image/print options
SheetRender sr = new SheetRender(worksheet, imgOptions);
for (int j = 0; j < sr.PageCount; j++)
{
//sr.ToImage(0, ms);
//Render the image for the sheet
Bitmap bitmap = sr.ToImage(j);
bitmap.Save(ms, ImageFormat.Bmp);
int newindex = dstWrk.Worksheets.Add();
dstWrk.Worksheets[newindex].Pictures.Add(0, 0, ms);
}
}

How may I go about this ?

Thanks,
Garkler

2

Hello Garkler,

Thanks for using our products.

In order to center align the image while placing it inside PDF document, please try using Alignment property of ImageInfo class. Please take a look over following code snippet in which I have specified the alignment information for image as Center aligned.

[C#]

//Instantiate a Pdf object by calling its empty constructor
Pdf pdf1 = new Pdf();
//Create a section in the Pdf object
Aspose.Pdf.Section sec1 = pdf1.Sections.Add();

//Create an image object in the section
Aspose.Pdf.Image image1 = new Aspose.Pdf.Image(sec1);
// specify the Horizontal alignment information for image
image1.ImageInfo.Alignment = AlignmentType.Center;
//Add image object into the Paragraphs collection of the section
sec1.Paragraphs.Add(image1);
//Set the path of image file
image1.ImageInfo.File = "d:/pdftest/Photo.JPG";
//Set the type of image using ImageFileType enumeration
image1.ImageInfo.ImageFileType = ImageFileType.Jpeg;
// specify the image heigh information eqaul to Section height minus Top and Bottom margin of page
image1.ImageInfo.FixHeight = sec1.PageInfo.PageHeight - sec1.PageInfo.Margin.Top - sec1.PageInfo.Margin.Bottom;
// specify the image Width information eqaul to Section Width minus Left and Right margin of page
image1.ImageInfo.FixWidth= sec1.PageInfo.PageWidth- sec1.PageInfo.Margin.Left- sec1.PageInfo.Margin.Right;

//Save the Pdf
pdf1.Save("d:/pdftest/ImageConversionTest.pdf");

In case it does not resolve your problem, please share the source image so that we can test the scenario at our end. We are sorry for your inconvenience.

3

How could I do the same thing using the new DOM approach which is now the preferred method?

4
Hi Kerby,

Thanks for contacting support.

Please try using the following code snippet based on new Document Object Model (DOM) of Aspose.Pdf namespace.

[C#]

//Instantiate a Pdf object by calling its empty constructor

Aspose.Pdf.Document pdf1 = new Aspose.Pdf.Document();

//Create a section in the Pdf object

Aspose.Pdf.Page sec1 = pdf1.Pages.Add();

//Create an image object in the section

Aspose.Pdf.Image image1 = new Aspose.Pdf.Image();

// specify the Horizontal alignment information for image

image1.HorizontalAlignment= Aspose.Pdf.HorizontalAlignment.Center;

//Add image object into the Paragraphs collection of the section

sec1.Paragraphs.Add(image1);

//Set the path of image file

image1.File = "c:/pdftest/Illustrator+Screen+Capture.jpg";

// specify the image heigh information eqaul to Section height minus Top and Bottom margin of page

image1.FixHeight = sec1.PageInfo.Height - sec1.PageInfo.Margin.Top - sec1.PageInfo.Margin.Bottom;

// specify the image Width information eqaul to Section Width minus Left and Right margin of page

image1.FixWidth = sec1.PageInfo.Width - sec1.PageInfo.Margin.Left - sec1.PageInfo.Margin.Right;

//Save the Pdf

pdf1.Save("C:/pdftest/ImageConversionTest.pdf");