如何在iframe中显示从ftp服务器恢复的pdf或图像文件 [英] How to show pdf or image file retrived from ftp server in iframe

问题描述

我想在IFrame控件中显示从FTP服务器检索到的pdf或图像文件



我尝试过：

  string  ParentFolder = ConfigurationManager.AppSettings [  DocReqFolder]。ToString（）; 
  int  l = filePath.IndexOf（'  。'）+  1 ; 
  string  Extn = filePath.Substring（l）; 
 Ftp_FileHandler Ftp =  new  Ftp_FileHandler（）; 
 Ftp.FtpPath_withCredents（）; 
 Ftp.FTP_DownloadFile（filePath，ParentFolder）; 
  var  context = System.Web.HttpContext.Current; 
 context.Response.Clear（）; 
 context.Response.AddHeader（  Content-Disposition，  attachment; filename = + filePath）; 
  if （Extn.Contains（  PDF ）==  true  || Extn.Contains（  pdf）==  true ）
 HttpContext.Current.Response.ContentType =   application / pdf; 
  else  
 HttpContext.Current.Response.ContentType =  应用/八位字节流; 
 context.Response.OutputStream.Write（Ftp.file， 0 ，Ftp.file.Length）; 
 context.Response.End（）; 
 

解决方案

将iframe的src属性设置为指向文档：

 <   iframe    < span class =code-attribute> src   =  https://i.ytimg.com/ vi / 7rB0Hvt1i3Q / maxresdefault.jpg >  
 <   p  > 您的浏览器不支持iframe。<   / p  >  
 <   / iframe  >  

如果您想直接流式传输内容而直接打印到文件，可以在这里看到：

使用简单网页流式传输文档 [ ^ ]

将 Content-Disposition 设置为附件强制浏览器下载文件。



将其更改为 inline 让浏览器内联显示文件：

< pre lang =C＃> context.Response.AddHeader（ Content-Disposition， inline; filename = + filePath）;

Content-Disposition - HTTP | MDN [ ^ ]



注意：有些浏览器不支持显示内联PDF。您需要使用像 PDF.js 这样的库[ ^ ]如果你需要支持它们。

I want to show pdf or image file retreived from FTP server in IFrame control

What I have tried:

string ParentFolder = ConfigurationManager.AppSettings["DocReqFolder"].ToString();
              int l = filePath.IndexOf('.') + 1;
              string Extn = filePath.Substring(l);
              Ftp_FileHandler Ftp = new Ftp_FileHandler();
              Ftp.FtpPath_withCredents();
              Ftp.FTP_DownloadFile(filePath, ParentFolder);
              var context = System.Web.HttpContext.Current;
              context.Response.Clear();
              context.Response.AddHeader("Content-Disposition", "attachment; filename=" + filePath);
              if (Extn.Contains("PDF") == true || Extn.Contains("pdf") == true)
                  HttpContext.Current.Response.ContentType = "application/pdf";
              else
                  HttpContext.Current.Response.ContentType = "application/octet-stream";
              context.Response.OutputStream.Write(Ftp.file, 0, Ftp.file.Length);
              context.Response.End();

解决方案

Set iframe's src attribute to point to the document:

<iframe src="https://i.ytimg.com/vi/7rB0Hvt1i3Q/maxresdefault.jpg">
  <p>Your browser does not support iframes.</p>
</iframe>

If you want to stream the content instead to pint to the file directly you can see here how:
Stream Your Documents Using Simple Web Page[^]

Setting the Content-Disposition to attachment forces the browser to download the file.

Change it to inline to let the browser display the file inline:

context.Response.AddHeader("Content-Disposition", "inline; filename=" + filePath);

Content-Disposition - HTTP | MDN[^]

NB: Some browsers don't support displaying PDFs inline. You'll need to use a library like PDF.js[^] if you need to support them.

这篇关于如何在iframe中显示从ftp服务器恢复的pdf或图像文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！