c# - 如何返回 MemoryStream docx 文件 MVC？

Question

我有一个 docx 文件，我想在编辑后返回该文件。我有以下代码...

object useFile = Server.MapPath("~/Documents/File.docx");
object saveFile = Server.MapPath("~/Documents/savedFile.docx");
MemoryStream newDoc = repo.ChangeFile(useFile, saveFile);
return File(newDoc.GetBuffer().ToArray(), "application/docx", Server.UrlEncode("NewFile.docx"));

文件看起来不错，但我收到错误消息(“文件已损坏”和另一条消息“Word 发现无法读取的内容。如果您信任来源，请单击是”)。有什么想法吗？

提前致谢

编辑

这是我模型中的 ChangeFile...

    public MemoryStream ChangeFile(object useFile, object saveFile)
    {
        byte[] byteArray = File.ReadAllBytes(useFile.ToString());
        using (MemoryStream ms = new MemoryStream())
        {
            ms.Write(byteArray, 0, (int)byteArray.Length);
            using (WordprocessingDocument wordDoc = WordprocessingDocument.Open(ms, true))
            {                    
                string documentText;
                using (StreamReader reader = new StreamReader(wordDoc.MainDocumentPart.GetStream()))
                {
                    documentText = reader.ReadToEnd();
                }

                documentText = documentText.Replace("##date##", DateTime.Today.ToShortDateString());
                using (StreamWriter writer = new StreamWriter(wordDoc.MainDocumentPart.GetStream(FileMode.Create)))
                {
                    writer.Write(documentText);
                }
            }
            File.WriteAllBytes(saveFile.ToString(), ms.ToArray());
            return ms;
        }
    }

Answer 1

我使用 FileStreamResult :

var cd = new System.Net.Mime.ContentDisposition
    {
        FileName = fileName,

        // always prompt the user for downloading, set to true if you want 
        // the browser to try to show the file inline
        Inline = false,
    };
Response.AppendHeader("Content-Disposition", cd.ToString());

return new FileStreamResult(documentStream, "application/vnd.openxmlformats-officedocument.wordprocessingml.document");