C#借助Spire.Doc for .NET实现Word段落和文本添加底纹

using spire.doc;
using spire.doc.documents;
using system.drawing;

namespace paragraphshading
{
    class program
    {
        static void main(string[] args)
        {
            // 创建一个新的word文档
            document document = new document();
            section section = document.addsection();

            // 添加一个段落
            paragraph paragraph1 = section.addparagraph();
            paragraph1.appendtext("这是一个没有底纹的段落。");

            // 添加另一个段落，并设置底纹
            paragraph paragraph2 = section.addparagraph();
            paragraph2.appendtext("这个段落将拥有一个绿色的背景底纹。");
            
            // 设置段落底纹的背景颜色
            paragraph2.format.shading.backgroundpatterncolor = color.lightgreen;
            // 可以选择设置底纹图案和前景颜色，这里我们使用纯色，所以texture为solid，foregroundcolor不影响
            paragraph2.format.shading.texture = texturestyle.texturesolid;
            // paragraph2.format.shading.foregroundcolor = color.darkgreen; // 如果texture不是solid，可以设置前景颜色

            // 添加第三个段落，演示不同底纹效果
            paragraph paragraph3 = section.addparagraph();
            paragraph3.appendtext("这个段落将使用一个水平条纹底纹。");
            paragraph3.format.shading.backgroundpatterncolor = color.lightblue;
            paragraph3.format.shading.foregroundcolor = color.darkblue;
            paragraph3.format.shading.texture = texturestyle.texturehorizontal;

            // 保存文档
            document.savetofile("paragraphshading.docx", fileformat.docx2013);
            document.dispose();
            system.console.writeline("文档已生成：paragraphshading.docx");
        }
    }
}

using spire.doc;
using spire.doc.documents;
using system.drawing;

namespace textshading
{
    class program
    {
        static void main(string[] args)
        {
            document document = new document();
            section section = document.addsection();

            paragraph paragraph = section.addparagraph();
            paragraph.appendtext("这是一段包含重要关键词的文本。");

            // 通过查找文本来获取textrange
            textselection selection = paragraph.find("重要关键词", true, true);
            if (selection != null)
            {
                textrange textrange = selection.getasonerange();
                // 设置textrange的底纹
                textrange.characterformat.shading.backgroundpatterncolor = color.yellow;
                textrange.characterformat.shading.texture = texturestyle.texturesolid;
            }

            // 也可以在追加文本时直接设置其底纹
            paragraph paragraph2 = section.addparagraph();
            textrange tr1 = paragraph2.appendtext("另一个示例：");
            textrange tr2 = paragraph2.appendtext("高亮文本");
            tr2.characterformat.shading.backgroundpatterncolor = color.lightcoral;
            tr2.characterformat.shading.texture = texturestyle.texturesolid;
            textrange tr3 = paragraph2.appendtext("，继续普通文本。");

            // 保存文档
            document.savetofile("textshading.docx", fileformat.docx2013);
            document.dispose();
            system.console.writeline("文档已生成：textshading.docx");
        }
    }
}