我当时在.NET Core项目中工作,应该从记录创建电子表格文件并下载它,而无需将其保存在服务器中。搜索上述标题并没有多大帮助,但给出了一些指示。另外,ASP.NET中使用的大多数方法在.NET Core中均不起作用。因此,我终于可以想出一个效果很好的解决方案。我将在下面的答案中与那些愿意像我一样进行搜索的人分享。
首先,您需要安装EPPlus.Core软件包。如果要通过Package Manager Console
安装它,则可以执行以下操作:
Install-Package EPPlus.Core
然后为OfficeOpenXml
添加您的using语句:
使用OfficeOpenXml;
然后您用于下载文件的示例方法将如下所示:
using OfficeOpenXml;
namespace MyProject.Controllers
{
public class SubscribersController : Controller
{
private readonly ApplicationDbContext _context;
public SubscribersController(ApplicationDbContext context)
{
_context = context;
}
public async Task<IActionResult> ExportToExcel()
{
var stream = new System.IO.MemoryStream();
using (ExcelPackage package = new ExcelPackage(stream))
{
var subscribers = await _context.Subscribers.ToListAsync();
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Subscribers");
worksheet.Cells[1, 1].Value = "Name";
worksheet.Cells[1, 2].Value = "Email";
worksheet.Cells[1, 3].Value = "Date Subscribed";
worksheet.Row(1).Style.Font.Bold = true;
for (int c = 2; c < subscribers.Count + 2; c++)
{
worksheet.Cells[c, 1].Value = subscribers[c - 2].Name;
worksheet.Cells[c, 2].Value = subscribers[c - 2].Email;
worksheet.Cells[c, 3].Value = subscribers[c - 2].DateCreated.ToString();
}
package.Save();
}
string fileName = "Subscribers.xlsx";
string fileType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
stream.Position = 0;
return File(stream, fileType, fileName);
}
}
}