ShapeCollection.InsertImageWatermark(DocumentPosition, Image, ImageWatermarkOptions) Method
Inserts an image watermark into the section header.
Namespace: DevExpress.XtraRichEdit.API.Native
Assembly: DevExpress.RichEdit.v23.2.Core.dll
NuGet Packages: DevExpress.RichEdit.Core, DevExpress.Win.Navigation
Declaration
[Browsable(false)]
Shape InsertImageWatermark(
DocumentPosition pos,
Image image,
ImageWatermarkOptions watermarkOptions
)Parameters
| Name | Type | Description |
|---|---|---|
| pos | DocumentPosition | The position of the watermark anchor. |
| image | Image | A watermark image. |
| watermarkOptions | ImageWatermarkOptions | An object that contains image watermark options. |
Returns
| Type | Description |
|---|---|
| Shape | The watermark inserted into the header. |
Remarks
Watermarks are stored in shape collections (ShapeCollection) of section headers. Call the Section.BeginUpdateHeader method to access a specific section header. Use the header’s SubDocument.Shapes property to return a collection of shapes located in the header. Call the InsertImageWatermark method to add an image watermark to the header. This method displays the watermark in the center of the page.
Note
When you add a watermark to a section header, 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.
You can use properties of the Shape object to change watermark position, rotate the watermark, and change its appearance (modify image settings, add an outline, and so on).
The following example adds an image watermark to the first document section, customizes the watermark’s appearance, and rotates the watermark counterclockwise by 45 degrees:
using DevExpress.XtraRichEdit;
using DevExpress.XtraRichEdit.API.Native;
using System.Drawing;
// ...
document.LoadDocument(@"Documents\Watermarks.docx");
// Access the first document section.
Section firstSection = document.Sections[0];
// Obtain the section's primary header.
var headerContent = firstSection.BeginUpdateHeader();
// Add an image watermark to the section.
Shape watermark = headerContent.Shapes.InsertImageWatermark(headerContent.Range.End,
Image.FromFile(@"Images\DevExpressLogo.png"),
new ImageWatermarkOptions() { Washout = false});
// Add a border to the watermark image.
watermark.Line.Thickness = 3;
watermark.Line.Fill.SetSolidFill(Color.Gray);
// Rotate the watermark.
watermark.RotationAngle = -45;
firstSection.EndUpdateHeader(headerContent);
document.SaveDocument(@"Documents\WatermarksUpd.docx", DocumentFormat.OpenXml);
The following image demonstrates the result:
