WatermarkManager Interface
Manages document watermarks.
Namespace: DevExpress.XtraRichEdit.API.Native
Assembly: DevExpress.RichEdit.v21.2.Core.dll
NuGet Package: DevExpress.RichEdit.Core
Declaration
Remarks
WatermarkManager allows you to add and remove watermarks without access to the watermark itself. You can use text or an image as a watermark.
Watermarks are located in section headers. If a document does not contain headers, WatermarkManager adds headers of the Primary type to all document sections.
If the document has multiple sections, WatermarkManager adds the same watermark to each section and each existing section header (first, primary, odd, or even).
The WatermarkManager.Type property indicates whether the document has watermarks. The property returns WatermarkType.None if the document does not contain watermarks.
Example
The code sample below adds a text watermark to all document pages.
using (RichEditDocumentServer wordProcessor = new RichEditDocumentServer())
{
wordProcessor.LoadDocument("DocumentProtection.docx");
TextWatermarkOptions textWatermarkOptions = new TextWatermarkOptions();
textWatermarkOptions.Color = System.Drawing.Color.LightGray;
textWatermarkOptions.FontFamily = "Calibri";
textWatermarkOptions.Layout = WatermarkLayout.Diagonal;
textWatermarkOptions.Semitransparent = true;
wordProcessor.Document.WatermarkManager.SetText("CONFIDENTIAL", textWatermarkOptions);
wordProcessor.SaveDocument("DocumentProtection_new.docx", DocumentFormat.OpenXml);
}