open xml sdk 将dataTable写入Excel 并下载 FileStrem

/// <summary>    
        /// 将集合类转换成DataTable    
        /// </summary>    
        /// <param name="list">集合</param>    
        /// <returns></returns>    
        public static DataTable ToDataTableTow(List<ElectronicReceiptModel> list)
        {
            DataTable result = new DataTable();
            if (list.Count > 0)
            {
                PropertyInfo[] propertys = list[0].GetType().GetProperties();

                foreach (PropertyInfo pi in propertys)
                {
                    result.Columns.Add(pi.Name, pi.PropertyType);
                }
                for (int i = 0; i < list.Count; i++)
                {
                    ArrayList tempList = new ArrayList();
                    foreach (PropertyInfo pi in propertys)
                    {
                        object obj = pi.GetValue(list[i], null);
                        tempList.Add(obj);
                    }
                    object[] array = tempList.ToArray();
                    result.LoadDataRow(array, true);
                }
            }
            return result;
        }

/// <summary>  
        /// 创建excel,并且把dataTable导入到excel中  
        /// </summary>         
        /// <param name="destination">保存路径</param>  
        /// <param name="table">数据源</param>   
 public static MemoryStream CreateExcel(DataTable table)
        {
            MemoryStream stream = new MemoryStream();
            using (var workbook = SpreadsheetDocument.Create(stream, DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))
            {
                var workbookPart = workbook.AddWorkbookPart();
                workbook.WorkbookPart.Workbook = new DocumentFormat.OpenXml.Spreadsheet.Workbook();
                workbook.WorkbookPart.Workbook.Sheets = new DocumentFormat.OpenXml.Spreadsheet.Sheets();

                uint sheetId = 1;
                bool isAddStyle = false;
                //foreach (DataTable table in dataTables)
                //{
                var sheetPart = workbook.WorkbookPart.AddNewPart<WorksheetPart>();
                var sheetData = new SheetData();
                sheetPart.Worksheet = new Worksheet();
                if (!isAddStyle)
                {
                    var stylesPart = workbook.WorkbookPart.AddNewPart<WorkbookStylesPart>();
                    Stylesheet styles = new CustomStylesheet();
                    styles.Save(stylesPart);
                    isAddStyle = true;
                }
                //Columns headColumns = CrateColunms(table);
                //sheetPart.Worksheet.Append(headColumns);
                DocumentFormat.OpenXml.Spreadsheet.Sheets sheets =
                    workbook.WorkbookPart.Workbook.GetFirstChild<DocumentFormat.OpenXml.Spreadsheet.Sheets>();
                string relationshipId = workbook.WorkbookPart.GetIdOfPart(sheetPart);

                if (sheets.Elements<DocumentFormat.OpenXml.Spreadsheet.Sheet>().Count() > 0)
                {
                    sheetId =
                        sheets.Elements<DocumentFormat.OpenXml.Spreadsheet.Sheet>().Select(s => s.SheetId.Value).Max() +
                        1;
                }
                string sheetName = "电子单";


                DocumentFormat.OpenXml.Spreadsheet.Sheet sheet = new DocumentFormat.OpenXml.Spreadsheet.Sheet()
                {
                    Id = relationshipId,
                    SheetId = sheetId,
                    Name = sheetName
                };
                sheets.Append(sheet);//创建表

                DocumentFormat.OpenXml.Spreadsheet.Row headerRow = new DocumentFormat.OpenXml.Spreadsheet.Row();

                List<String> columns = new List<string>();
                foreach (DataColumn column in table.Columns)
                {
                    columns.Add(column.ColumnName);

                    DocumentFormat.OpenXml.Spreadsheet.Cell cell = new DocumentFormat.OpenXml.Spreadsheet.Cell();
                    cell.DataType = DocumentFormat.OpenXml.Spreadsheet.CellValues.String;
                    cell.StyleIndex = 11;
                    cell.CellValue = new DocumentFormat.OpenXml.Spreadsheet.CellValue(column.ColumnName);
                    headerRow.AppendChild(cell);
                }
                sheetData.AppendChild(headerRow);//创建表头

                foreach (DataRow dsrow in table.Rows)
                {
                    DocumentFormat.OpenXml.Spreadsheet.Row newRow = new DocumentFormat.OpenXml.Spreadsheet.Row();
                    foreach (String col in columns)
                    {
                        DocumentFormat.OpenXml.Spreadsheet.Cell cell = new DocumentFormat.OpenXml.Spreadsheet.Cell();
                        cell.DataType = DocumentFormat.OpenXml.Spreadsheet.CellValues.String;
                        cell.StyleIndex = 10;
                        cell.CellValue = new DocumentFormat.OpenXml.Spreadsheet.CellValue(dsrow[col].ToString()); //  
                        newRow.AppendChild(cell);
                    }
                    sheetData.AppendChild(newRow);
                }
                sheetPart.Worksheet.Append(sheetData);//创建单元格

                workbook.Close();
            }
            stream.Position = 0;
            return stream;
        }

//字符流的形式下载Excel
1   DataTable table = ElectronicReceiptView.ToDataTableTow(proList);
var stream= ElectronicReceiptView.CreateExcel(table);
      return  File(stream, "application/ms-excel", name);