Create Transparent Image of Excel Worksheet

Sometimes, you need to generate the image of your worksheet as a transparent image. You want to apply transparency to all cells which have no fill colors. Aspose.Cells for Python via .NET provides the ImageOrPrintOptions.transparent property to apply transparency to the worksheet image. When this property is false, then cells with no fill colors are drawn with white color and when it is true, cells with no fill colors are drawn transparent.

In the following worksheet image, transparency has not been applied. The cells with no fill colors are drawn white.

Output without transparency: the cell background is white

While, in the following worksheet image, transparency has been applied. The cells with no fill colors are transparent.

Output with transparency enabled

The following sample code generates a transparent image from an Excel worksheet.

from aspose.cells import Workbook
from aspose.cells.drawing import ImageType
from aspose.cells.rendering import ImageOrPrintOptions, SheetRender

#  For complete examples and data files, please go to https:# github.com/aspose-cells/Aspose.Cells-for-.NET
# Source directory
sourceDir = RunExamples.Get_SourceDirectory()
# Output directory
outputDir = RunExamples.Get_OutputDirectory()
#  Create workbook object from source file
wb = Workbook(sourceDir + "sampleCreateTransparentImage.xlsx")
#  Apply different image or print options
imgOption = ImageOrPrintOptions()
imgOption.image_type = ImageType.PNG
imgOption.horizontal_resolution = 200
imgOption.vertical_resolution = 200
imgOption.one_page_per_sheet = True
#  Apply transparency to the output image
imgOption.transparent = True
#  Create image after apply image or print options
sr = SheetRender(wb.worksheets[0], imgOption)
sr.to_image(0, outputDir + "outputCreateTransparentImage.png")