在MVC控制器中導出具有編碼的CSV文件

Question

我有以下用於導出csv文件的控制器操作

public ActionResult ExportExcel(int projectId)
        {
            var risks = new RiskRepository().GetRisksByProjectId(projectId);
            var commaDelimmeted =
                    risks.Select(
                        r => r.RiskDescription + "," + r.RiskTypeId.ToString() + "," + r.Likelihood.ToString() + "," + r.Impact + "," + r.Action + "," + r.ActionBy + ",")
                        .ToList();

            string data = commaDelimmeted.Aggregate(string.Empty, (current, line) => current + line + Environment.NewLine);

            Response.ClearContent();
            Response.Buffer = true;
            // set the header
            var aliasName = "someFile.csv";
            Response.AddHeader("content-disposition", "attachment; filename=" + aliasName);
            Response.ContentType = "application/csv";
            Response.Charset = "";
            Response.ContentEncoding = Encoding.UTF8;
            Response.Output.Write(data);
            Response.Flush();
            Response.End();

            return File(Response.OutputStream, "application/csv");
        }

輸出的csv文件無法正確顯示從右到左的語言字符，因此我將響應內容編碼標頭設置為問題仍然存在。

有什么想法嗎？

編輯：看這篇文章中達林的解決方案不能解決我的問題，在csv輸出文件中輸出顯示System.Byte []。

Answer 1

 Have you tried setting the encoding in a meta tag in the HTML?

 <meta http-equiv="content-type" content="application/xhtml+xml; charset=UTF-8" />
   Excel won't see the response headers, so it won't know what the Response.Encoding is. The meta tag allows it to find out.

Answer 2

除非絕對需要將其作為CSV文件，否則建議您將其轉換為使用ClosedML（在NuGet上可用）以生成正確的XLSX文件-然后，您可以使用GetMimeMapping函數並返回FileStreamResult。

Answer 3

根據這篇文章 ，事實證明編碼前導必須附加到csv數據中，如下所示：

using (var sw = System.IO.File.Create(csvPath))
            {
                var preamble = Encoding.UTF8.GetPreamble();
                sw.Write(preamble, 0, preamble.Length);
                var databytes = Encoding.UTF8.GetBytes(data);
                sw.Write(databytes, 0, data.Length);
            }

這成功了。