导出巨大的 Excel 文件时 'System.OutOfMemoryException' 发生在 mscorlib.dll

Question

我正在尝试使用 EPPlus 导出包含 1,800,000 多行数据和 9 列的 Excel 文件。我使用了一个数据集并将其分成批次（每个数据表 100,000 个）。目前，它最多可以导出 1,000,000 行。

下面是我的导出代码：

    public FileContentResult ExportInventory()
    {
         DataSet dsInventory = Session["Live_Inventory"] as DataSet;

         var filename = "Excel Inventory.xlsx";
         var excelContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
         byte[] excelContent = ExportExcel(dsInventory);

         return File(excelContent, excelContentType, filename);
    }

    public byte[] ExportExcel(DataSet dsInventory)
    {
         byte[] result = null;
         ExcelWorksheet workSheet = null;

         var package = new ExcelPackage();
         for (int tbl = 1; tbl <= dsInventory.Table.Count; tbl++)
         {
              workSheet = package.Workbook.Worksheets.Add(String.Format("Sheet " + tbl));
              workSheet.Cells["A1"].LoadFromDataTable(dsInventory.Tables[tbl], true);                  
         }

         result = package.GetAsByteArray();//Exception occurs here when table count > 10 
         return result;
    }

Answer 1

更新答案：

你应该看看这个：Export large data to an exel file

这绝对能帮到你。

Answer 2

public void DataToExcel(DataTable dataToConvert, HttpResponse response)
{
    FileInfo myFile = new FileInfo("~/MyProject/Inventory.xlsx");
    using (ExcelPackage package = new ExcelPackage(myFile))
    {
        ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Sheet1");

        worksheet.Cells["A1"].LoadFromDataTable(dataToConvert, true, OfficeOpenXml.Table.TableStyles.Light1);

        package.Save();


        response.Clear();
        response.ContentType = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
        response.AddHeader("Content-Disposition", string.Format("attachment;filename=\"{0}\"", "Inventory.xlsx"));
        response.WriteFile("~/MyProject/Inventory.xlsx");
        response.Flush();
        response.End();

    }

}