MemoryStream生成Excel

public static MemoryStream ToExcel<T>(List<T> list, string filePath = null)

{

var memoryStream = new MemoryStream();

 

IWorkbook workbook = new HSSFWorkbook();

string sheetName = typeof(T).Name;

ISheet sheet = workbook.CreateSheet(sheetName);

IRow headerRow = sheet.CreateRow(0);

Type elementType = typeof(T);

// handling header.

int headerIndex = 0;

elementType.GetProperties().ToList().ForEach(propInfo =>

{

ICell headerCell = headerRow.CreateCell(headerIndex);

headerIndex = headerIndex + 1;

headerCell.SetCellValue(propInfo.Name);

});

int rowIndex = 1;

foreach (T item in list)

{

IRow dataRow = sheet.CreateRow(rowIndex);

int rowcellIndex = 0;

elementType.GetProperties().ToList().ForEach(propInfo =>

{

ICell cell = dataRow.CreateCell(rowcellIndex);

string value = (propInfo.GetValue(item, null) ?? "").ToString();

cell.SetCellValue(value);

rowcellIndex++;

});

rowIndex++;

}

///storage/emulated/0/DCIM

//FileStream fs = new FileStream("/storage/emulated/0/DCIM/log.xls", FileMode.OpenOrCreate, FileAccess.ReadWrite);

workbook.Write(memoryStream);

//fs.Write(memoryStream.ToArray(), 0, (int)memoryStream.Length);

 

//fs.Dispose();

workbook = null;

return memoryStream;

 

}