NPOI vs EPPlus 导出Excel简单对比

1.引用NPOI.dll和EPPlus.dll

2.EPPlus的导出实验

/// <summary>
/// EPPlus V4.1 for .NET3.5 24.8万行数据，总用时14秒,EXCEL共6.24MB
/// </summary>
protected void ToExcel_epp(DataTable dt)
{
using (ExcelPackage package = new ExcelPackage())
{
var worksheet = package.Workbook.Worksheets.Add("sheet1");   //创建sheet
//worksheet.Cells[1, 1, 3, 6].Merge = true;        //合并单元格 worksheet.Cells[int fromRow, fromCol, int toRow,int toCol]
//worksheet.Cells["A1"].Value = "LOUV数据汇总";  //标题
worksheet.Cells.Style.Font.Name = "华文细黑";  //字体设置
worksheet.Cells.Style.Font.Size = 12;
worksheet.Column(0).Style.Font.Name = "微软雅黑"; //根据列设置样式
worksheet.Cells.Style.Border.Left.Style = ExcelBorderStyle.Thin;  //边框样式
worksheet.Cells.Style.Border.Right.Style = ExcelBorderStyle.Thin;
worksheet.Cells.Style.Border.Bottom.Style = ExcelBorderStyle.Thin;
worksheet.Cells.Style.Border.Top.Style = ExcelBorderStyle.Thin;
worksheet.Cells.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;  //水平对齐方式
worksheet.Cells.Style.VerticalAlignment = ExcelVerticalAlignment.Bottom;  //垂直对齐方式
//worksheet.Cells.Style.Fill.BackgroundColor.SetColor(Color.DarkGray);  //背景色
//worksheet.Cells.Style.Fill.PatternType = ExcelFillStyle.LightUp;
//worksheet.Cells.Style.WrapText = true;  //折行显示
worksheet.Cells.Style.ShrinkToFit = true;  //单元格自适应大小

//写入data
for (int i = 0; i < dt.Rows.Count; i++)
{
worksheet.Cells[i + 3, 1].Value = dt.Rows[i]["VouID"];
worksheet.Cells[i + 3, 2].Value = dt.Rows[i]["SampleName"];
worksheet.Cells[i + 3, 3].Value = dt.Rows[i]["Mat"];
worksheet.Cells[i + 3, 4].Value = dt.Rows[i]["LINE"];
worksheet.Cells[i + 3, 5].Value = dt.Rows[i]["UserID"];
worksheet.Cells[i + 3, 6].Value = dt.Rows[i]["Grade"];
}

//Write it back to the client
var data = package.GetAsByteArray();
Response.Clear();
Response.AddHeader("content-disposition", "attachment; filename=Lvou.xlsx");
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.BinaryWrite(data);
Response.Flush();
Response.End();
}
}

3.NPOI的导出实验

/// <summary>
/// NPOI V2.0 for .NET3.5 24.8万行数据，总用时13秒，EXCEL共32MB
/// </summary>
protected void ToExcel_npoi(DataTable dt)
{
HSSFWorkbook workbook = new HSSFWorkbook();
ISheet sheet = workbook.CreateSheet();//创建sheet
//ISheet sheet = workbook.GetSheet("sheet1"); //获取到有名字的sheet
//ISheet sheet = workbook.GetSheetAt(0);//获取索引处的sheet
//workbook.SetSheetName(0, "Lvou表"); //设置索引为0的sheet的名字

#region 右击文件 属性信息
{
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "NPOI";
workbook.DocumentSummaryInformation = dsi;

SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = "文件作者信息"; //填加xls文件作者信息
si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
si.Comments = "作者信息"; //填加xls文件作者信息
si.Title = "标题信息"; //填加xls文件标题信息
si.Subject = "主题信息";//填加文件主题信息
si.CreateDateTime = DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion

ICellStyle cellstyle = workbook.CreateCellStyle(); //样式
//IDataFormat format = workbook.CreateDataFormat();
//cellstyle.DataFormat = format.GetFormat("yyyy-mm-dd");
sheet.SetColumnWidth(0,5000); //设置列宽
sheet.SetColumnWidth(1,3000);
IFont font = workbook.CreateFont();
font.FontName = "微软雅黑";
//font.Boldweight = 700;
cellstyle.SetFont(font);

#region 列头及样式
//{
//    HSSFRow headerRow = sheet.CreateRow(1);
//    HSSFCellStyle headStyle = workbook.CreateCellStyle();
//    headStyle.Alignment = NPOI.HSSF.UserModel.HSSFCellStyle.ALIGN_CENTER;
//    HSSFFont font = workbook.CreateFont();
//    font.FontHeightInPoints = 10;
//    font.Boldweight = 700;
//    headStyle.SetFont(font);
//    foreach (DataColumn column in dtSource.Columns)
//    {
//        headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
//        headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

//        //设置列宽
//        sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
//    }
//    // headerRow.Dispose();
//}
#endregion

#region 取得列宽
//int[] arrColWidth = new int[dt.Columns.Count];
//foreach (DataColumn item in dt.Columns)
//{
//    arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
//}
//for (int i = 0; i < dt.Rows.Count; i++)
//{
//    for (int j = 0; j < dt.Columns.Count; j++)
//    {
//        int intTemp = Encoding.GetEncoding(936).GetBytes(dt.Rows[i][j].ToString()).Length;
//        if (intTemp > arrColWidth[j])
//        {
//            arrColWidth[j] = intTemp;
//        }
//    }
//}
#endregion

//写入数据
int k = 1;
int q = 1;
foreach (DataRow dr in dt.Rows)
{
if (k == 60000)
{
sheet = workbook.CreateSheet("sheet" + q);
k = 1;
q++;
}
IRow row = sheet.CreateRow(k+2);

row.CreateCell(0).SetCellValue(dr[
4000
"VouID"].ToString());
row.GetCell(0).CellStyle = cellstyle;
row.CreateCell(1).SetCellValue(dr["SampleName"].ToString());
row.GetCell(1).CellStyle = cellstyle;
row.CreateCell(2).SetCellValue(dr["Mat"].ToString());
row.GetCell(2).CellStyle = cellstyle;
row.CreateCell(3).SetCellValue(dr["LINE"].ToString());
row.GetCell(3).CellStyle = cellstyle;
row.CreateCell(4).SetCellValue(dr["UserID"].ToString());
row.GetCell(4).CellStyle = cellstyle;
row.CreateCell(5).SetCellValue(dr["Grade"].ToString());
row.GetCell(5).CellStyle = cellstyle;
k++;
}

HttpContext curContext = HttpContext.Current;
// 设置编码和附件格式
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.ContentEncoding = Encoding.UTF8;
curContext.Response.Charset = "";
curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode("Lvou.xls", Encoding.UTF8));
Response.BinaryWrite(WriteToStream(workbook).GetBuffer());
Response.End();
}

/// 导出到文件流
/// <summary>
/// 导出到文件流
/// </summary>
/// <param name="hssfworkbook"></param>
/// <returns></returns>
private MemoryStream WriteToStream(HSSFWorkbook hssfWorkbook)
{
MemoryStream file = new MemoryStream();
hssfWorkbook.Write(file);
return file;
}

4.结论