在word中插表格并居中

给Word文档绘制表格示例
//选择文件保存位置
 private Word.Application G_wa;//定义Word应用程序字段
        private object G_missing = //定义missing字段并赋值
            System.Reflection.Missing.Value;
        private object G_str_path;//定义文件保存路径字段
        private FolderBrowserDialog G_FolderBrowserDialog;//定义文件夹浏览对话框字段        private void btn_Select_Click(object sender, EventArgs e)
        {
            G_FolderBrowserDialog =//创建浏览文件夹对象
                 new FolderBrowserDialog();
            DialogResult P_DialogResult = //浏览文件夹
                G_FolderBrowserDialog.ShowDialog();
            if (P_DialogResult == DialogResult.OK)//确认已经选择文件夹
            {
                btn_New.Enabled = true;//启用新建按钮
                txt_path.Text = //显示选择路径
                    G_FolderBrowserDialog.SelectedPath;
            }
        }
//任意绘制表格
private void btn_New_Click(object sender, EventArgs e)
        {
            G_ToolProgressBar.Minimum = 1;//设置进度条最小值
            G_ToolProgressBar.Maximum = //设置进度条最大值
                int.Parse(txt_row.Text)+1;
            btn_New.Enabled = false;//停用新建按钮
            ThreadPool.QueueUserWorkItem(//使用线程池
                (P_temp) =>//使用lambda表达式
                {
                    G_wa = new Word.Application();//创建Word应用程序对象
                    Word.Document P_wd = G_wa.Documents.Add(//建立新文档
                        ref G_missing, ref G_missing, ref G_missing, ref G_missing);
                    Word.Range P_Range = P_wd.Paragraphs[1].Range;//得到文档范围对象
                    object P_DefaultTable = //创建表格参数对象
                        Word.WdDefaultTableBehavior.wdWord8TableBehavior;
                    object P_AutoFit = //创建表格参数对象
                        Word.WdAutoFitBehavior.wdAutoFitWindow;
                    Word.Table P_WordTable = P_Range.Tables.Add(//向文档中添加表格
                        P_Range,
                        int.Parse(txt_row.Text),
                        int.Parse(txt_column.Text),
                        ref P_DefaultTable, ref P_AutoFit);
                    for (int i = 1; i < int.Parse(txt_row.Text) + 1; i++)
                    {
                        for (int j = 1; j < int.Parse(txt_column.Text) + 1; j++)
                        {
                            P_WordTable.Cell(i, j).Range.Text =//使用双层循环向表格中添加数据
                                string.Format("{0}行 {1}列", i.ToString(), j.ToString());
                            Thread.Sleep(10);//线程挂起10毫秒
                        }
                        this.Invoke(//调用窗体线程
                            (MethodInvoker)(() => //使用Lambda表达式
                            {
                                G_ToolProgressBar.Value = i + 1;//设置进度信息
                            }));
                    }
                    G_str_path = string.Format(//计算文件保存路径
                        @"{0}\{1}", G_FolderBrowserDialog.SelectedPath,
                        DateTime.Now.ToString("yyyy年M月d日h时s分m秒fff毫秒") + ".doc");
                    P_wd.SaveAs(//保存Word文件
                        ref G_str_path,
                        ref G_missing, ref G_missing, ref G_missing, ref G_missing,
                        ref G_missing, ref G_missing, ref G_missing, ref G_missing,
                        ref G_missing, ref G_missing, ref G_missing, ref G_missing,
                        ref G_missing, ref G_missing, ref G_missing);
                    ((Word._Application)G_wa.Application).Quit(//退出应用程序
                        ref G_missing, ref G_missing, ref G_missing);
                    this.Invoke(//开始执行窗体线程
                        (MethodInvoker)(() =>//使用lambda表达式
                        {
                            btn_Display.Enabled = true;//启用显示按钮
                            MessageBox.Show("成功创建Word文档！", "提示！");
                        }));
                });
        }
//显示创建的文档
private void btn_Display_Click(object sender, EventArgs e)
        {
            G_wa = //创建应用程序对象
                 new Microsoft.Office.Interop.Word.Application();
            G_wa.Visible = true;//将文档设置为可见
            Word.Document P_Document = G_wa.Documents.Open(//打开Word文档
                ref G_str_path, ref G_missing, ref G_missing, ref G_missing, ref G_missing,
                ref G_missing, ref G_missing, ref G_missing, ref G_missing, ref G_missing,
                ref G_missing, ref G_missing, ref G_missing, ref G_missing, ref G_missing,
                ref G_missing);
        }