'Chart (linked to Excel data)' pasting option availability

pmestevez · October 6, 2010, 10:49pm

Hi,
I have been trying to insert Excel charts in PowerPoint slides using Aspose.Cells in combination with Aspose.Slides. As I have mentioned in my previous posts; I want to obtain the same result as if I had copied the chart in Excel 2007 and pasted it in PowerPoint 2007.
I will use the attached file “Input book.xlsx” to describe the process that I want to automate. When I open this file, copy the chart, do not close Excel and go to PowerPoint and create a new presentation with a blank slide and paste, it gives me the following options:

1- Paste as ‘Chart (linked to Excel data)’
2- Paste as ‘Excel Chart (entire workbook)’
3- ‘Paste as Picture’

If prior to pasting I close Excel then option number 2 is disabled.
Considering that I need to allow other users to perform changes to the charts in the presentation, then option 3 is not valid for our project.
Charts obtained from option 1 can be manipulated directly in PowerPoint even if the original file is no longer available. When selected it is also shown a menu tab named ‘Chart Tools’. When inspecting a ppt presentation containing this chart, Aspose.Slides recognizes that shape as a PictureFrame.
When opening a similar saved ppt presentation, but in which the Chart has been pasted with option 2, then the available menu tab is ‘Drawing tools’, you cannot edit the items in the chart without double clicking on it, and in this particular case (using the chart from “Input book.xlsx”) when the chart is deselected, it gets resized (but keeps formatting). When inspected this presentation with Aspose.Slides, the chart shape is recognized as an OleObjectFrame. I have already read the articles and posts you provide for these objects when inserting charts in presentations.

My question is: Is there any way to obtain shapes equivalent to if I had selected option 1?

Option 2 is not good enough for our project because the quality of the images used for the OleObjectFrames is not the best; and when deselecting the charts after having edited them, they lose the formatting. I tried the recommendations in the article available at http://www.aspose.com/documentation/.net-components/aspose.slides-for-.net/working-solution-for-chart-resizing.html and they still keep losing the format. Could you please let us know so we can make some important decisions?
I am attaching the mentioned saved ppt presentations.

Thanks in advance for your support and efforts,
Pablo

mudassir.fayyaz · October 7, 2010, 12:25pm

Dear Pablo,

I am afraid to share that unfortunately, the only work able option for you in case of Aspose.Slides for .NET is option 2. There may be some compromise as well in terms of image quality. As far as the chart resizing issue is concerned, I feel the the article for chart resizing may prove helpful to you. Please share with us, if you have any issue using the article.

Thanks and Regards,

pmestevez · October 8, 2010, 2:46am

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static void Main(string[] args)

{

Aspose.Slides.License slidesLicense = new Aspose.Slides.License();

slidesLicense.SetLicense("Aspose.Slides.lic");

Aspose.Cells.License cellsLicense = new Aspose.Cells.License();

cellsLicense.SetLicense("Aspose.Cells.lic");

Workbook workbook = new Workbook("Pie Chart.xlsx");

Chart chart = workbook.Worksheets[0].Charts[0];

Presentation presentation = new Presentation("Presentation1.ppt");

Slide slide = presentation.Slides[0];

Shape sizeShape = slide.Shapes[0];

CopyExcelChart(workbook, chart, 0, slide, sizeShape.X, sizeShape.Y,

sizeShape.Width, sizeShape.Height);

try

{

presentation.Save("Presentation1 - saved.ppt", Aspose.Slides.Export.SaveFormat.Ppt);

}

catch { }

}

public static Shape CopyExcelChart(Workbook workbook, Chart chart, int worksheetIndex,

Slide destinationSlide, int x, int y, int width, int height)

{

ImageOrPrintOptions options = new ImageOrPrintOptions()

{

Quality = 100,

ImageFormat = ImageFormat.Jpeg,

};

chart.SizeWithWindow = true;

workbook.Worksheets.WindowWidthInch = width / 576f;

workbook.Worksheets.WindowHeightInch = height / 576f;

//workbook.Worksheets.ActiveSheetIndex = worksheetIndex;

Bitmap bitmap = chart.ToImage(options);

MemoryStream workbookStream = workbook.SaveToStream();

Picture picture = new Picture(destinationSlide.Parent, bitmap);

int picId = destinationSlide.Parent.Pictures.Add(picture);

byte[] chartOleData = new byte[workbookStream.Length];

workbookStream.Position = 0;

workbookStream.Read(chartOleData, 0, chartOleData.Length);

OleObjectFrame oof = destinationSlide.Shapes.AddOleObjectFrame(

x, y, width, height, "Excel.Sheet.8", chartOleData);

oof.PictureId = picId;

bitmap.Dispose();

workbookStream.Close();

return oof;

}

mudassir.fayyaz · October 8, 2010, 6:57am

Dear Pablo,

I am greatly sorry for your inconvenience,

I have worked with the code snippet shared by you. The code snippet generated the correct presentation as desired. The problem is when you activate the Ole frame, it actually opens the excel sheet in edit mode for the chart and when you deactivate the excel sheet the setting is no longer preserved. This is a logical behavior as you have tried to edit the Ole frame in PowerPoint and you will be presented with the sheet for editing the chart data. Secondly, even if you try to scroll vertically and horizontally the sheet containing the chart, you may not receive same chart size again. The reason behind this is that in your code you have set the chart size in accordance with shape size in slide and when in edit mode the shape is no longer preserved. Hope it answers the query. I will request our development team for any possibility of implementation of the Option 1 issue mentioned in previous post and will be obliged to share the information with you once any update is available.

Thanks and Regards,

pmestevez · October 8, 2010, 1:07pm

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Dear Mudassir,

Thanks again for your detailed response. I understood the explanation you gave me, but what I still do not know is if there is a chance to amend that.

Using the same file “Pie Chart.xlsx”, I will open it in Excel and will copy the chart, pasting it as an OleObject Frame (Option 2) in a new presentation in PowerPoint that I will save as “Presentation2.ppt”. I if close the file and open it again, PowerPoint 2007 prompts a message with text “To edit this chart using the new features available in the 2007 Microsoft Office System, you must first convert it to the 2007 Office system format. Do you want to convert this chart to the new format?”. If I click on “Edit Existing” it activates the Ole frame, and I can edit the content in the worksheet. The difference is that the chart instead of being in embedded in the sheet, now it is in a separate one. In this case it opens the Excel sheet in edit mode, with the same size of the Chart in PowerPoint. Once deactivated the chart image is updated correctly.

My questions are:

1. How should I modify the code snippet included in my previous post? I want to be able to modify the data and have an updated chart image, the same way I do it in PowerPoint.

2. Why when I double click the chart generated with your library as an Ole object in PowerPoint (Presentation1 – saved.ppt) it does not ask me if I want to convert it to the new 2007 format? That might be good enough for our purposes.

Thanks and regards,

Pablo