C#使用Spire.Doc for .NET获取并替换Word文档中的字体

using spire.doc;
using system;
using system.collections.generic;

class program
{
    static void main()
    {
        document doc = new document("input.docx");
        list<string> fonts = new list<string>(doc.getallfonts());
        
        console.writeline("文档字体列表：");
        foreach (string font in fonts)
        {
            console.writeline($"- {font}");
        }
        doc.close();
    }
}

文档字体列表：
- 微软雅黑
- arial
- times new roman

using spire.doc;

class program
{
    static void main()
    {
        document doc = new document("input.docx");
        
        foreach (section section in doc.sections)
        {
            foreach (paragraph para in section.paragraphs)
            {
                foreach (documentobject obj in para.childobjects)
                {
                    if (obj.documentobjecttype == documentobjecttype.textrange)
                    {
                        textrange tr = obj as textrange;
                        if (tr.characterformat.fontname == "微软雅黑")
                        {
                            tr.characterformat.fontname = "宋体";
                            tr.characterformat.fontsize = 12f;
                        }
                    }
                }
            }
        }
        
        doc.defaultsubstitutionfontname = "arial"; // 缺失字体默认替换
        doc.savetofile("output.docx", fileformat.docx2019);
        doc.close();
    }
}

try { /* 加载与处理 */ }
catch (exception ex) { console.writeline(ex.message); }