C#实现为Word文档特定字符或句子添加边框

using Spire.Doc;
using Spire.Doc.Documents;
using System.Drawing;

Document doc = new Document("input.docx");
Section sec = doc.LastSection;
Paragraph para = sec.AddParagraph();

TextRange tr = para.AppendText("关键**字符**需边框");
tr.CharacterFormat.Border.BorderType = BorderStyle.Single;
tr.CharacterFormat.Border.LineWidth = 1.0f;
tr.CharacterFormat.Border.Color = Color.Red;

try
{
    doc.SaveToFile("char_output.docx", FileFormat.Docx);
}
catch (Exception ex)
{
    Console.WriteLine($"处理失败: {ex.Message}");
}
finally
{
    doc.Dispose();
}

Document doc = new Document();
Section sec = doc.AddSection();
Paragraph para1 = sec.AddParagraph();
para1.AppendText("这是带边框的**完整句子**。");

para1.Format.Borders.BorderType = BorderStyle.Single;
para1.Format.Borders.Color = Color.Blue;
para1.Format.Borders.LineWidth = 1.5f;

// 批量处理
foreach (Paragraph p in sec.Paragraphs)
{
    if (p.Text.Contains("句子"))
    {
        p.Format.Borders.BorderType = BorderStyle.DotDash;
        p.Format.Borders.Color = Color.Green;
        p.Format.Borders.LineWidth = 1.0f;
    }
}

try
{
    doc.SaveToFile("sentence_output.docx", FileFormat.Docx);
}
catch (Exception ex)
{
    Console.WriteLine($"批量失败: {ex.Message}");
}
doc.Dispose();