WebApi 使用 EPPlus excel 文件下载 - 打开时出错 - 无法读取内容 - 修复

Question

在我的 extjs 网络客户端上，我点击了一个按钮，它下载了一个 excel 模板并填充了数据。当我点击 CHROME 弹出窗口打开 excel 文件时，它给我下面的 excel 错误消息。有谁知道我该如何解决这个问题？实际文件对我来说很好。

这是我的 webapi 代码

        public HttpResponseMessage CreatePosSheet(string cName, string calcMethod, string username, int cid, HttpRequestMessage Request)
    {
        string templatePath = HttpContext.Current.Server.MapPath(@"~\tempLocation\");
        string templateFileName = System.Configuration.ConfigurationManager.AppSettings["TemplateFileName"];
        string templateName = string.Format("{0}{1}", templatePath, templateFileName);
        FileInfo xlTemplate = new FileInfo(templateName);

        HttpResponseMessage response;
        response = Request.CreateResponse(HttpStatusCode.OK);
        MediaTypeHeaderValue mediaType = new MediaTypeHeaderValue("application/octet-stream");
        //MediaTypeHeaderValue mediaType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.Content = new ByteArrayContent(ExcelSheet(xlTemplate, cName, calcMethod, username, cid));
        response.Content.Headers.ContentType = mediaType;
        response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
        response.Content.Headers.ContentDisposition.FileName = "Orders.xlsx";

        return response;
    }

这里是ExcelSheet代码

        public byte[] ExcelSheet(FileInfo xlTemplate, string cName, string calcMethod, string username, int cid)
    {
        object[] tempObj = Orders(username, cid);
        List<TradeDetailDTO> tList = new List<TradeDetailDTO>();
        List<TempClass> acctList = new List<TempClass>();
        List<TempClass2> sectorList = new List<TempClass2>();
        tList = tempObj[0] as List<TradeDetailDTO>;
        acctList = tempObj[1] as List<TempClass>;
        sectorList = tempObj[2] as List<TempClass2>;

        #region set column variables

        int colAcctNum = 1;
        int colAcctDesc = 2;
        int colAcctTrdLvl = 5;


        int colCname = 6;
        int rowCname = 15;

        #endregion

        using (var package = new ExcelPackage(xlTemplate))
        {

            var worksheet = package.Workbook.Worksheets["Data"];
            var wkshtFormula = package.Workbook.Worksheets["Formulas"];
            wkshtFormula.Cells[rowCname, colCname].Value = cName;

            package.Save();
            return package.GetAsByteArray();
        }
    }

Answer 1

您必须删除对 .Save() 的调用，因为它会作为副作用关闭 pck。有关详细信息，请参阅此内容：

WebApi 使用 EPPlus excel 文件下载 - 打开时出错 - 无法读取内容 - 修复

WebApi using EPPlus excel file download - error on open - unreadable content - repair

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