问OfficeOpenXml Excel 打印区域怎么设置？

using OfficeOpenXml;

using OfficeOpenXml.Style;

public void ExportBLL(string modelFilePath, string saveFilePath)

{

//文件拷贝

File.Copy(modelFilePath, saveFilePath);

FileInfo saveFile = new FileInfo(saveFilePath);

//打开Excel编辑

using (ExcelPackage package = new ExcelPackage(saveFile))

{

ExcelWorksheet worksheet = null;

//新建编辑表单

//编辑

worksheet = package.Workbook.Worksheets.Copy("报价表", "报价清单");

if (dt_Product == null)

{

return;

}

//根据产品数量插入行

int num = dt_Product.Rows.Count;

decimal count = 0;

if (num > 1)

worksheet.InsertRow(8, num-1);

}

}