c#使用aspose.cells 从datatable导出数据到excel

string json=value.Value;
                    DataTable dt=Utils.JsonDataTableConvert.ToDataTable(json);


                    string fileName = tableTemplate.Name + ".xls";
                    string savePath = Server.MapPath("~/Upload/TempExcelDownLoad/" + fileName);

                  
                    Workbook book = new Workbook();
                    Worksheet sheet = book.Worksheets[0];
                    Cells cells = sheet.Cells;


                    int Colnum = dt.Columns.Count;//表格列数 
                    int Rownum = dt.Rows.Count;//表格行数 






                    //生成行 列名行 
                    for (int i = 0; i < Colnum; i++)
                    {
                        cells[0, i].PutValue(dt.Columns[i].ColumnName);
                    }


                    //生成数据行 
                    for (int i = 0; i < Rownum; i++)
                    {
                        for (int k = 0; k < Colnum; k++)
                        {
                            cells[1 + i, k].PutValue(dt.Rows[i][k].ToString());
                        }
                    }




                    book.Save(savePath);
                    System.Threading.Thread.Sleep(400);
                    Response.AddHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(fileName));
                    //Response.AddHeader("Content-Length", file.Length.ToString());
                    Response.WriteFile(savePath);
                    Response.End();