XinXiBu
/
OA2023


			
				
					
						
						
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							using Aspose.Words;
using Aspose.Words.Loading;
using Markdig;
using System.Text;
using System.Text.RegularExpressions;

public static class WordExporter
{
    private static readonly MarkdownPipeline MarkdownPipeline = new MarkdownPipelineBuilder()
        .UseAdvancedExtensions()
        .Build();

    public static void MarkdownToWord(string markdown, string outputPath)
    {
        if (string.IsNullOrWhiteSpace(markdown))
            throw new ArgumentException("markdown 不能为空", nameof(markdown));

        // 清理 AI 常带的 ```markdown 和 ```
        markdown = CleanMarkdown(markdown);
        // AI 返回内容有时会把表格压成一行，这里做一次轻量修复
        markdown = NormalizeSingleLineTableMarkdown(markdown);

        // Markdown -> HTML，再由 Aspose 读取 HTML 保留格式
        var htmlBody = Markdown.ToHtml(markdown, MarkdownPipeline);
        var htmlContent = BuildHtmlDocument(htmlBody);
        var htmlBytes = Encoding.UTF8.GetBytes(htmlContent);
        using var stream = new MemoryStream(htmlBytes);
        stream.Position = 0;

        var loadOptions = new LoadOptions
        {
            LoadFormat = LoadFormat.Html,
            Encoding = Encoding.UTF8
        };

        //判断路径是否存在
        var dir = Path.GetDirectoryName(outputPath);
        if (!string.IsNullOrWhiteSpace(dir) && !Directory.Exists(dir))
        {
            Directory.CreateDirectory(dir);
        }

        var doc = new Document(stream, loadOptions);
        doc.Save(outputPath, SaveFormat.Docx);
    }

    private static string CleanMarkdown(string input)
    {
        input = input.Trim();

        if (input.StartsWith("```markdown", StringComparison.OrdinalIgnoreCase))
            input = input.Substring("```markdown".Length);

        if (input.StartsWith("```"))
            input = input.Substring(3);

        if (input.EndsWith("```"))
            input = input.Substring(0, input.Length - 3);

        return input.Trim();
    }

    private static string NormalizeSingleLineTableMarkdown(string markdown)
    {
        if (string.IsNullOrWhiteSpace(markdown))
            return markdown;

        // 已经是多行内容则不处理
        if (markdown.Contains('\n') || markdown.Contains('\r'))
            return markdown;

        // 仅在明显是表格时处理，避免误伤普通文本
        if (!markdown.Contains("|") || !Regex.IsMatch(markdown, @"\|\s*[-:]{3,}"))
            return markdown;

        // 把单行中的“行结束 + 下一行开始”从 "| |" 规整为换行
        var normalized = Regex.Replace(markdown, @"\|\s+\|", "|\n|");
        return normalized;
    }

    private static string BuildHtmlDocument(string body)
    {
        return $@"<!DOCTYPE html>
<html>
<head>
    <meta charset=""utf-8"" />
    <style>
        body {{ font-family: Calibri, 'Microsoft YaHei', sans-serif; line-height: 1.6; }}
        pre, code {{ font-family: Consolas, 'Courier New', monospace; }}
        pre {{ background: #f6f8fa; padding: 8px; border-radius: 4px; }}
        table {{ border-collapse: collapse; width: 100%; }}
        th, td {{ border: 1px solid #d0d7de; padding: 6px 8px; }}
        blockquote {{ border-left: 4px solid #d0d7de; margin: 8px 0; padding-left: 12px; color: #57606a; }}
    </style>
</head>
<body>
{body}
</body>
</html>";
    }
}