javascript - .NET C# 使用 ExcelPackage 通过 JS post 导出到 excel

Question

我不确定我在这里遗漏了什么。我有一个按钮，单击该按钮时，我正在使用 javascript 调用 Controller 。该 Controller 应创建一个 excel 文件并将其返回给用户，使他们能够下载/保存该文件。我尝试了几种不同的方法，但无法让它发挥作用。这是我的 JavaScript 方面:

function exportList() {
    var val = $("#team-dropdown").val();
    const date = new Date().toISOString();
    const param = {
        "Date": date,
        "GroupID": 1
    }

    $.ajax({
        url: "@Url.Action("ExportToExcel", "Home")",
        type: "POST",
        data: param
    });
}

这是我的服务器端:

public FileResult ExportToExcel(DateTime date, int groupID)
        {
            Load l = new Load();
            List<Load> loadList = l.GetLoadsForGroup(date, groupID);

            var fileDownloadName = "fileName.xlsx";
            var contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

            ExcelPackage pck = new ExcelPackage();
            var ws = pck.Workbook.Worksheets.Add("New workbook");
            ws.View.ShowGridLines = true;
            ws.DefaultColWidth = 25;
            ws.Cells[1, 1].Value = "Order #";

            var currRow = 2;
            foreach (var load in loadList)
            {
                ws.Cells[2, 2].Value = load.LoadNumber;                    
            }



            var fs = new MemoryStream();
            pck.SaveAs(fs);
            fs.Position = 0;
            var fsr = new FileStreamResult(fs, contentType);
            fsr.FileDownloadName = fileDownloadName;
            return (fsr);
        }

不确定最好的方法是什么。如果有更好的方法，请随时详细说明。

Answer 1

您的方法看起来不错。在那种情况下，您只需要使用 html form 来发布而不是使用 js 函数。或者，如果您想使用 ActionResult，您可以这样写:

public ActionResult ExportToExcel()
    {
        Load l = new Load();
        List<Load> loadList = l.GetLoadsForGroup(date, groupID);

        var fileDownloadName = "fileName.xlsx";
        var contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

        ExcelPackage pck = new ExcelPackage();
        var ws = pck.Workbook.Worksheets.Add("New workbook");
        ws.View.ShowGridLines = true;
        ws.DefaultColWidth = 25;
        ws.Cells[1, 1].Value = "Order #";

        var currRow = 2;
        foreach (var load in loadList)
        {
            ws.Cells[2, 2].Value = load.LoadNumber;
        }

        Response.Clear();
        Response.ContentType = contentType;
        Response.AddHeader("content-disposition", "attachment; filename=\"" + fileDownloadName + "\"");
        Response.BinaryWrite(pck.GetAsByteArray());
        Response.Flush();
        Response.End();
        return View();
    }

并且您会得到与您的方法相同的结果。