C#实现给Word每一页设置不同图片水印

using Spire.Doc;
using Spire.Doc.Documents;
using Spire.Doc.Fields;

namespace ImageWatermark2
{
    class Program
    {
        static void Main(string[] args)
        {
            //加载Word测试文档
            Document doc = new Document();
            doc.LoadFromFile("test.docx");

            //获取文档第一节
            Section section1 = doc.Sections[0];

            //定义水印图片的纵向坐标位置
            float y = section1.PageSetup.PageSize.Height/3;

            //添加图片水印1
            HeaderFooter header1 = section1.HeadersFooters.Header;//获取页眉
            header1.Paragraphs.Clear();//删除原有页眉格式的段落
            Paragraph para1 = header1.AddParagraph();//重新添加段落
            DocPicture pic1 = para1.AppendPicture("logo1.png");//添加图片
            pic1.TextWrappingStyle = TextWrappingStyle.Behind;//图片置于文字下方
            pic1.VerticalPosition = y;
            pic1.HorizontalAlignment = ShapeHorizontalAlignment.Center;//设置图片对齐方式

            //同理设置第二节页眉中的图片水印2
            Section section2 = doc.Sections[1];
            HeaderFooter header2 = section2.HeadersFooters.Header;
            header2.Paragraphs.Clear();
            Paragraph para2 = header2.AddParagraph();
            DocPicture pic2 = para2.AppendPicture("logo2.png");
            pic2.TextWrappingStyle = TextWrappingStyle.Behind;
            pic2.VerticalPosition = y;
            pic2.HorizontalAlignment = ShapeHorizontalAlignment.Center;

            //同理设置第三节中的页眉中的图片水印3
            Section section3 = doc.Sections[2];
            HeaderFooter header3 = section3.HeadersFooters.Header;
            header3.Paragraphs.Clear();
            Paragraph para3 = header3.AddParagraph();
            DocPicture pic3 = para3.AppendPicture("logo3.png");
            pic3.TextWrappingStyle = TextWrappingStyle.Behind;
            pic3.VerticalPosition = y;
            pic3.HorizontalAlignment = ShapeHorizontalAlignment.Center;

            //保存文档
            doc.SaveToFile("DifferentImageWatermark.docx", FileFormat.Docx2013);
            System.Diagnostics.Process.Start("DifferentImageWatermark.docx");
        }
    }
}

Imports Spire.Doc
Imports Spire.Doc.Documents
Imports Spire.Doc.Fields

Namespace ImageWatermark2
    Class Program
        Private Shared Sub Main(args As String())
            '加载Word测试文档
            Dim doc As New Document()
            doc.LoadFromFile("test.docx")

            '获取文档第一节
            Dim section1 As Section = doc.Sections(0)

            '定义水印图片的纵向坐标位置
            Dim y As Single = section1.PageSetup.PageSize.Height / 3

            '添加图片水印1
            Dim header1 As HeaderFooter = section1.HeadersFooters.Header
            '获取页眉
            header1.Paragraphs.Clear()
            '删除原有页眉格式的段落
            Dim para1 As Paragraph = header1.AddParagraph()
            '重新添加段落
            Dim pic1 As DocPicture = para1.AppendPicture("logo1.png")
            '添加图片
            pic1.TextWrappingStyle = TextWrappingStyle.Behind
            '图片置于文字下方
            pic1.VerticalPosition = y
            pic1.HorizontalAlignment = ShapeHorizontalAlignment.Center
            '设置图片对齐方式
            '同理设置第二节页眉中的图片水印2
            Dim section2 As Section = doc.Sections(1)
            Dim header2 As HeaderFooter = section2.HeadersFooters.Header
            header2.Paragraphs.Clear()
            Dim para2 As Paragraph = header2.AddParagraph()
            Dim pic2 As DocPicture = para2.AppendPicture("logo2.png")
            pic2.TextWrappingStyle = TextWrappingStyle.Behind
            pic2.VerticalPosition = y
            pic2.HorizontalAlignment = ShapeHorizontalAlignment.Center

            '同理设置第三节中的页眉中的图片水印3
            Dim section3 As Section = doc.Sections(2)
            Dim header3 As HeaderFooter = section3.HeadersFooters.Header
            header3.Paragraphs.Clear()
            Dim para3 As Paragraph = header3.AddParagraph()
            Dim pic3 As DocPicture = para3.AppendPicture("logo3.png")
            pic3.TextWrappingStyle = TextWrappingStyle.Behind
            pic3.VerticalPosition = y
            pic3.HorizontalAlignment = ShapeHorizontalAlignment.Center

            '保存文档
            doc.SaveToFile("DifferentImageWatermark.docx", FileFormat.Docx2013)
            System.Diagnostics.Process.Start("DifferentImageWatermark.docx")
        End Sub
    End Class
End Namespace