c#生成Excel操作字体合并行等

Workbook xBk;
        _Worksheet xSt;

        Microsoft.Office.Interop.Excel.ApplicationClass excel = new Microsoft.Office.Interop.Excel.ApplicationClass();
        //xBk.re
        xBk = excel.Workbooks.Add(true);

        xSt = (_Worksheet)xBk.ActiveSheet;
        //合并整行
        xSt.get_Range(excel.Cells[1, 1], excel.Cells[1, 2]).Merge(0);
        excel.Cells[1, 1] = "标题";
        xSt.get_Range(excel.Cells[1, 1], excel.Cells[1, 1]).Font.Size = 16;
        xSt.get_Range(excel.Cells[1, 1], excel.Cells[1, 1]).Font.Name = "楷体";
        //设置整个报表的标题为跨列居中 
        // 
        xSt.get_Range(excel.Cells[1, 1], excel.Cells[1, 1]).Select();
        xSt.get_Range(excel.Cells[1, 1], excel.Cells[1, 1]).HorizontalAlignment = XlHAlign.xlHAlignCenterAcrossSelection;


        excel.Cells[2, 1] = "test";
        excel.Cells[2, 2] = "test2";
        xBk.SaveCopyAs(Server.MapPath("/data") + "\\" + "2008.xls");
        System.IO.FileInfo file = new System.IO.FileInfo(Server.MapPath("/data") + "\\" + "2008.xls");
        Response.Clear();
        Response.Charset = "";
        Response.ContentEncoding = System.Text.Encoding.UTF8;
        // 添加头信息，为"文件下载/另存为"对话框指定默认文件名 
        Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name));
        // 添加头信息，指定文件大小，让浏览器能够显示下载进度 
        Response.AddHeader("Content-Length", file.Length.ToString());

        // 指定返回的是一个不能被客户端读取的流，必须被下载 
        Response.ContentType = "application/ms-excel";

        // 把文件流发送到客户端 
        Response.WriteFile(file.FullName);
        // 停止页面的执行 

        Response.End();