C# npoi向word插入表格

可以使用 NPOI 库来向 Word 文档中插入表格。以下是一个示例代码：

using System;
using System.IO;
using NPOI.XWPF.UserModel;
using NPOI.OpenXmlFormats.Wordprocessing;

namespace InsertTableInWord
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建 Word 文档对象
            XWPFDocument doc = new XWPFDocument();

            // 创建一个段落对象
            XWPFParagraph paragraph = doc.CreateParagraph();

            // 创建一个表格对象
            XWPFTable table = doc.CreateTable(3, 3);

            // 设置表格样式
            CT_TblPr tblPr = table.GetCTTbl().tblPr;
            tblPr.tblBorders = new CT_TblBorders();
            tblPr.tblBorders.top = new CT_Border();
            tblPr.tblBorders.top.val = ST_Border.single;
            tblPr.tblBorders.bottom = new CT_Border();
            tblPr.tblBorders.bottom.val = ST_Border.single;
            tblPr.tblBorders.left = new CT_Border();
            tblPr.tblBorders.left.val = ST_Border.single;
            tblPr.tblBorders.right = new CT_Border();
            tblPr.tblBorders.right.val = ST_Border.single;
            tblPr.tblLayout = new CT_TblLayoutType();
            tblPr.tblLayout.type = ST_TblLayoutType.autofit;

            // 设置表格内容
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    // 获取单元格对象
                    XWPFTableCell cell = table.GetRow(i).GetCell(j);

                    // 设置单元格内容
                    cell.SetText("Row " + i + ", Column " + j);
                }
            }

            // 将表格添加到段落中
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            XWPFRun run = paragraph.CreateRun();
            run.SetText("Table Title");
            run.IsBold = true;
            run.FontSize = 14;
            run.FontFamily = "Times New Roman";
            run.SetTextPosition(20);
            paragraph = doc.CreateParagraph();
            paragraph.SpacingBefore = 200;
            paragraph.SpacingAfter = 200;
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("This is a sample table:");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");
            paragraph = doc.CreateParagraph();
            paragraph.Alignment = ParagraphAlignment.CENTER;
            paragraph.VerticalAlignment = TextAlignment.CENTER;
            paragraph.CreateRun().SetText("");

            // 保存 Word 文档
            using (FileStream stream = new FileStream("table.docx", FileMode.Create))
            {
                doc.Write(stream);
            }
        }
    }
}

在上面的示例代码中，首先创建了一个 Word 文档对象，然后创建了一个段落对象和一个表格对象，并且设置了表格的样式和内容。接着将表格添加到段落中，并设置段落的样式。最后将文档保存到指定的文件中。

注意：上面的代码示例中，为了使表格居中，特意在表格前添加了多个空行来进行排版。实际使用时，可以根据需要调整段落的样式和排版方式。