到目前为止,这是我下载powerpoint文件的代码。我为powerpoint使用了aspose软件包,这是指向aspose文档https://docs.aspose.com/dashboard.action
的链接 [HttpGet]
[Route("exportpowerpoint1")]
public HttpResponseMessage Export()
{
using (Presentation presentation = new Presentation(HttpContext.Current.Server.MapPath("~/PPTexports/testfile.pptx")))
{
MemoryStream stream = new MemoryStream();
presentation.Save(stream,SaveFormat.Pptx);
stream.Position = 0;
var returnResult = Request.CreateResponse(HttpStatusCode.OK);
returnResult.Content = new StreamContent(stream);
returnResult.Content.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.presentationml.presentation");
returnResult.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = "testfile.pptx"
};
return returnResult;
}}
使用此代码,我可以下载文件,但是当我打开文件时,powerpoint会显示此错误消息,并且文件大小也加倍
Error message: powerpoint found unreadable content in testfile.pptx
我认为内存流两次写入文件,这是大小增加一倍并且由于重复的内容而导致文件无法打开的原因,但是我无法找到问题的原因有人可以帮忙吗?