WatermarkManager.SetImage(DocumentImageSource) Method
Adds an image watermark to a header of the specified section.
Namespace: DevExpress.XtraRichEdit.API.Native
Assembly: DevExpress.RichEdit.v23.2.Core.dll
NuGet Packages: DevExpress.RichEdit.Core, DevExpress.Win.Navigation
Declaration
Parameters
| Name | Type | Description |
|---|---|---|
| imageSource | DocumentImageSource | A watermark image. |
Remarks
If you need to add a watermark to a header of a specific section, ensure that the Section.IsHeaderLinkedToPrevious and Section.IsHeaderLinkedToNext methods return false for this header. Otherwise, the header has the same content as the header of the previous or next section, respectively.
If a section defined by the section parameter does not have a header of the specified type, the SetImage method creates this header. Consider the following when you use this method to create a header and insert a watermark:
Enable the Section.DifferentFirstPage property and pass the First value to the SetImage method to create a separate watermark for the section’s first page.
Enable the Document.DifferentOddAndEvenPages property if you need to add different watermarks to odd and even pages.
The code sample below adds different watermarks to the document sections. The document contains two sections: the first section occupies the first page, and the second section occupies the second page. All sections have no headers. The WatermarkManager.SetImage method creates the first page header for the first section and adds an image watermark to this header. The WatermarkManager.SetText method creates a primary header (the same header for all pages) for the second section and inserts a text watermark into this header.
using DevExpress.XtraRichEdit;
using DevExpress.XtraRichEdit.API.Native;
using System.Drawing;
// ...
document.LoadDocument(@"Documents\Watermarks.docx");
var firstSection = document.Sections[0];
var secondSection = document.Sections[1];
// Define image watermark options.
var imageWatermarkOptions = new ImageWatermarkOptions
{ Washout = false };
// Add an image watermark to the first page header.
firstSection.DifferentFirstPage = true;
document.WatermarkManager.SetImage(firstSection, HeaderFooterType.First,
DocumentImageSource.FromFile(@"Images\DevExpressLogo.png"), imageWatermarkOptions);
// Add a text watermark to the second section's header.
document.WatermarkManager.SetText(secondSection, HeaderFooterType.Primary, "DRAFT");
document.SaveDocument(@"Documents\WatermarksUpd.docx", DocumentFormat.OpenXml);