using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using DocumentFormat.OpenXml;

using DocumentFormat.OpenXml.Packaging;

using DocumentFormat.OpenXml.Wordprocessing;

namespace AddStringToWord

{

    public class Program

    {

        public static void Main(string[] args)

        {

            AddString("Test.docx", "你好呀");

        }

        public static void AddString(string filePath, string str)

        {

            using (WordprocessingDocument doc = WordprocessingDocument.Open(filePath, true))

            {

                Paragraph paragraph = new Paragraph();

                Run run = new Run();

                RunProperties runProperties = new RunProperties(); //属性

                RunFonts fonts = new RunFonts() { EastAsia = "DFKai-SB" }; // 设置字体

                FontSize size = new FontSize() { Val = "52" }; // 设置字体大小

                Color color = new Color() { Val = "red" }; // 设置字体样式

                // 将样式添加到属性里面

                runProperties.Append(color);

                runProperties.Append(size);

                runProperties.Append(fonts);

                run.Append(runProperties);

                run.Append(new Text(str));

                paragraph.Append(run);

                doc.MainDocumentPart.Document.Body.Append(paragraph);

                doc.MainDocumentPart.Document.Save();

            }

        }

    }

}