Question

我在服务器上使用EPPlus生成了一个Excel文件，该文件正确生成并使用window.location在本地计算机上正常工作，但在部署到服务器时无效。我正在尝试通过MVC控制器返回FileStreamResult，但我不认为它正在工作。我正在使用ajax调用来访问控制器方法，但在方法运行时无法输入.done。

我一直在寻找ASP.NET MVC EPPlus Download Excel File来获取我的C＃参考资料。

脚本

 function exportToExcel() {
    var batchName = $("#batchDateSelect option:selected").text();
    var bID = $("#batchDateSelect").val();
    var params = {
        BatchID: bID,
        BatchName: batchName
    };
    $.post(path + "Export/ExportToExcel", params)
    .done(function (Data, textStatus, jqXHR) {
        var fileName = "";

        ////window.location = path + "ExportFiles/"+fileName;
    });

}

控制器

public ActionResult ExportToExcel(int BatchID,string BatchName)
{

    FileStreamResult FSR = DataAccess.ExportUtility.CreateExcelFile(BatchID, BatchName);

    return FSR;

}

EPPlus方法

public static FileStreamResult CreateExcelFile(int batchid,string batchName)
    {

        string fileName = batchName + " Reason_Code_Export.xlsx";
        var serverPath = HttpContext.Current.Server.MapPath("~/ExportFiles/");
        DirectoryInfo outputDir = new DirectoryInfo(serverPath);

        FileInfo newfile = new FileInfo(outputDir.FullName + fileName);
        if (newfile.Exists)
        {
            newfile.Delete();
            newfile = new FileInfo(outputDir.FullName + fileName);
        }
        Dictionary<string,int> MAData = PolicyDataAccess.GetMatchActionData(batchid);
        MemoryStream MS = new MemoryStream();
        using (ExcelPackage package = new ExcelPackage(newfile))
        {
            ..........
            ........

            package.SaveAs(MS);
        }
        MS.Position = 0;
        var contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

        FileStreamResult FSR = new FileStreamResult(MS, contentType);
        FSR.FileDownloadName = fileName;



        return FSR;
    }

获取该文件的最简单方法是什么？

Answer 1

我对这个问题迟到了，但可能会对其他人有所帮助。

设置excel表格然后而不保存或将其添加到MemoryStream ，只需将字节数组作为 packge.GetAsByteArray（）并从您的操作中返回它作为文件而不是FileStreamResult 。

var FileBytesArray = packge.GetAsByteArray();
return File(FileBytesArray, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", filename + ".xlsx");

Answer 2

EPPLUS给了我一些真正的麻烦。
我对MVC并不熟悉，但我认为你想要直接写输出响应。在这种情况下，我会使用类似下面的内容我看到我在评论中留下了内存流写入的工作原理。这更接近你要求做的，但我目前没有在我的代码中使用它。所以买家要小心。

.cheers。

        Response.Clear();
        Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

        Response.AddHeader( "Content-Disposition", "attachment; filename=ProposalRequest-" + fileName + ".xslx" );
        Response.BinaryWrite( pck.GetAsByteArray() );
        // myMemoryStream.WriteTo(Response.OutputStream); //works too
        Response.Flush();
        Response.Close();

Answer 3

DougY发布的答案可能正常，但我确实在他发布之前找到了解决方案。

我不会将此标记为已回答，因为我确定有更好的方法，如果有人想发布或评论什么是最好的方法，那就标记答案了。

感谢DougY的回复

控制器的两种方法可能会合并，但这就是它最终的结果。

控制器

public static string ContentType { get; set; }
public static string FilePath { get; set; }
public static string FileName { get; set; }
public static byte[] Bytes { get; set; }

public void ExportToExcel(int BatchID,string BatchName)//is called first to set the variables
    {
        string contentType;
        byte[] bytes;
        string ret = DataAccess.ExportUtility.CreateExcelFile(BatchID, BatchName,out contentType, out bytes);
        ContentType = contentType;
        Bytes = bytes;

        FileName = ret[1];




    }
    public ActionResult DownloadExcelFile()//is then called to download the file
    {

        return File(Bytes, ContentType, FileName);

    }

ExportUtility类

public static string[] CreateExcelFile(int batchid,string batchName,out string ContentType, out byte[] Bytes)
    {

        string fileName = batchName + " Reason_Code_Export.xlsx";

        var serverPath = HttpContext.Current.Server.MapPath("~/ExportFiles/");
        DirectoryInfo outputDir = new DirectoryInfo(serverPath);
        byte[] bytes;
        FileInfo newfile = new FileInfo(outputDir.FullName + fileName);
        if (newfile.Exists)
        {
            newfile.Delete();
            newfile = new FileInfo(outputDir.FullName + fileName);
        }
        Dictionary<string,int> MAData = PolicyDataAccess.GetMatchActionData(batchid);
        MemoryStream MS = new MemoryStream();
        ExcelPackage package;
        using (package = new ExcelPackage(newfile))
        {
            ExcelWorksheet worksheet = package.Workbook.Worksheets.Add(batchName);

            worksheet.Cells["A1"].Value = batchName + " Reason_Code_Export";
            worksheet.Cells["A1"].Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
            worksheet.Cells["A1:B1"].Merge = true;
            worksheet.Cells["A1:B1"].Style.Font.Bold = true;

            worksheet.Cells["A2"].Value = "Reason Code";
            worksheet.Cells["B2"].Value = "Number of Reason Codes Selected";
            worksheet.Cells["A2:B2"].Style.Font.Bold = true;
            int row = 3;
            int col = 1;
            foreach (KeyValuePair<string,int> MA in MAData)
            {
                worksheet.Cells[row, col].Value = MA.Key;
                worksheet.Cells[row, col + 1].Value = MA.Value;
                row++;

            }
            worksheet.Column(1).Width = 34.29;
            worksheet.Column(2).Width = 34.29;

            package.Workbook.Properties.Title = batchName + " Reason_Code_Export";
            package.Workbook.Properties.Author = "Intranet Application: Unclaimed Properties";
            package.Workbook.Properties.Company = "Assurity Life 2013";
            Bytes = package.GetAsByteArray();
            //package.SaveAs(newfile);//MS);

        }
        MS.Position = 0;
        var rl = serverPath + fileName;
        var contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        ContentType = contentType;
        FileStreamResult FSR = new FileStreamResult(MS, contentType);
        FSR.FileDownloadName = fileName;
        string[] ret = new string[2];
        ret[0] = serverPath;
        ret[1] = fileName;


        return ret;
    }

如何在MVC中使用EPPlus从服务器下载.xlsx文件

3 个答案: