我正在使用 NPOI 插件将内容导出为 Excel 文件。问题是,当导出文件达到最小导出大小(比如,65535)时,它会抛出超出大小限制的异常。所以我决定去动态创建另一个工作表来修改65535之后的记录。但我不知道如何编写这个逻辑。请指导我如何做到这一点的逻辑。
代码
GridModel model = GetItems().AsQueryable().ToGridModel(page, int.MaxValue, orderBy, string.Empty, filter);
var orders = model.Data.Cast<ViewModel>();
//Create new Excel workbook
var workbook = new HSSFWorkbook();
//Create new Excel sheet
var sheet = workbook.CreateSheet();
//int index = workbook.AddPicture(@"D:\Temp\2\autocomplete tables", HSS);
// HSSFPicture signaturePicture = patriarch.CreatePicture(anchor, index);
////(Optional) set the width of the columns
sheet.SetColumnWidth(0, 10 * 256);
sheet.SetColumnWidth(1, 20 * 256);
sheet.SetColumnWidth(2, 110 * 256);
sheet.SetColumnWidth(3, 30 * 256);
//Create a header row
var headerRow = sheet.CreateRow(0);
//Set the column names in the header row
headerRow.CreateCell(0).SetCellValue("Itemid");
headerRow.CreateCell(1).SetCellValue("ItemNo");
headerRow.CreateCell(2).SetCellValue("Title");
headerRow.CreateCell(3).SetCellValue("Status");
//(Optional) freeze the header row so it is not scrolled
sheet.CreateFreezePane(0, 1, 0, 1);
int rowNumber = 1;
//Populate the sheet with values from the grid data
foreach (ViewModel order in orders)
{
//Create a new row
if (rowNumber < 65535)
{
var row = sheet.CreateRow(rowNumber++);
//Set values for the cells
row.CreateCell(0).SetCellValue(order.Itemid);
row.CreateCell(1).SetCellValue(order.INo);
row.CreateCell(2).SetCellValue(order.BTags);
row.CreateCell(3).SetCellValue(order.Sid);
}
else
{
}
}
//Write the workbook to a memory stream
MemoryStream output = new MemoryStream();
workbook.Write(output);
//Return the result to the end user
return File(output.ToArray(), //The binary data of the XLS file
"application/vnd.ms-excel", //MIME type of Excel files
"Items.xls"); //Suggested file name in the "Save as" dialog which will be displayed to the end user
}
谢谢