Working with worksheet headers and footers Leave feedback
You can extract information about all the headers and footers in an Excel document as shown in the below code sample.
AdvancedUsage.AddingWatermarks.AddWatermarksToSpreadsheets.SpreadsheetGetHeaderFooterInformation
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Specify an absolute or relative path to your document. Ex: @"C:\Docs\spreadsheet.xlsx"
using (Watermarker watermarker = new Watermarker("spreadsheet.xlsx", loadOptions))
{
SpreadsheetContent content = watermarker.GetContent<SpreadsheetContent>();
foreach (SpreadsheetWorksheet worksheet in content.Worksheets)
{
foreach (SpreadsheetHeaderFooter headerFooter in worksheet.HeadersFooters)
{
Console.WriteLine(headerFooter.HeaderFooterType);
foreach (SpreadsheetHeaderFooterSection section in headerFooter.Sections)
{
Console.WriteLine(section.SectionType);
if (section.Image != null)
{
Console.WriteLine(section.Image.Width);
Console.WriteLine(section.Image.Height);
Console.WriteLine(section.Image.GetBytes().Length);
}
Console.WriteLine(section.Script);
}
}
}
}
You can also clear a particular header or footer using GroupDocs.Watermark as shown in the below code sample.
AdvancedUsage.AddingWatermarks.AddWatermarksToSpreadsheets.SpreadsheetClearHeaderFooter
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Specify an absolute or relative path to your document. Ex: @"C:\Docs\spreadsheet.xlsx"
using (Watermarker watermarker = new Watermarker("spreadsheet.xlsx", loadOptions))
{
SpreadsheetContent content = watermarker.GetContent<SpreadsheetContent>();
foreach (SpreadsheetHeaderFooterSection section in content
.Worksheets[0].HeadersFooters[OfficeHeaderFooterType.HeaderPrimary]
.Sections)
{
section.Script = null;
section.Image = null;
}
watermarker.Save("spreadsheet.xlsx");
}
Using GroupDocs.Watermark, you can also clear a particular section of header or footer as shown in the sample code below.
AdvancedUsage.AddingWatermarks.AddWatermarksToSpreadsheets.SpreadsheetClearSectionOfHeaderFooter
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Specify an absolute or relative path to your document. Ex: @"C:\Docs\spreadsheet.xlsx"
using (Watermarker watermarker = new Watermarker("spreadsheet.xlsx", loadOptions))
{
SpreadsheetContent content = watermarker.GetContent<SpreadsheetContent>();
SpreadsheetHeaderFooterSection section = content.Worksheets[0]
.HeadersFooters[OfficeHeaderFooterType.HeaderEven]
.Sections[SpreadsheetHeaderFooterSectionType.Left];
section.Image = null;
section.Script = null;
watermarker.Save("spreadsheet.xlsx");
}
GroupDocs.Watermark enables you to add watermark to images inside any header or footer. You can use below code sample to achieve this.
AdvancedUsage.AddingWatermarks.AddWatermarksToSpreadsheets.SpreadsheetAddWatermarkToImagesInHeaderFooter
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
// Specify an absolute or relative path to your document. Ex: @"C:\Docs\spreadsheet.xlsx"
using (Watermarker watermarker = new Watermarker("spreadsheet.xlsx", loadOptions))
{
// Initialize image or text watermark
TextWatermark watermark = new TextWatermark("Protected image", new Font("Arial", 8));
watermark.HorizontalAlignment = HorizontalAlignment.Center;
watermark.VerticalAlignment = VerticalAlignment.Center;
watermark.RotateAngle = 45;
watermark.SizingType = SizingType.ScaleToParentDimensions;
watermark.ScaleFactor = 1;
SpreadsheetContent content = watermarker.GetContent<SpreadsheetContent>();
foreach (SpreadsheetWorksheet worksheet in content.Worksheets)
{
foreach (SpreadsheetHeaderFooter headerFooter in worksheet.HeadersFooters)
{
foreach (SpreadsheetHeaderFooterSection section in headerFooter.Sections)
{
if (section.Image != null)
{
// Add watermark to the image
section.Image.Add(watermark);
}
}
}
}
watermarker.Save("spreadsheet.xlsx");
}
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