为什么不超链接打开该文件？ [英] Why doesn't the hyperlink open the file?

问题描述

此前开发商已经把使用这个标签code和它变成了一个超链接在运行时间。

 ＆LT; ASP：标签ID =lbl_Attachment=服务器＆GT;
＆LT; / ASP：标签＆gt;lbl_Attachment.Text =＆LT; A HREF ='.. /上传/+
                      ds_row [附件]的ToString（）+'。＆gt;中+
                      ds_row [附件]的ToString（）+＆LT; / A＆gt;中。
 

但是，这是行不通的。所以我改变了code以下在新的浏览器标签页中打开的任何文件（图像/ PDF /字）和错误仍然存​​在：

  hyperlinkAppDoc.NavigateUrl =
          RESOLVEURL（../上传/+
          。ds_row [附件]的ToString（））;
      hyperlinkAppDoc.Target =_blank;
 

我能做些什么来解决这个问题？ MIME类型是在IIS可用。

---

更新：
我尝试了不同的方法。然而，使用Server.Mappath 在本地驱动器，而不是wwwroot文件poiting。我怎么可以指向路径wwwroot文件夹？

 字符串pdfPath =使用Server.Mappath（〜/ SomeFile.pdf的）;
Web客户端的客户端=新的WebClient（）;
字节[]缓冲= client.DownloadData（pdfPath）;
Response.ContentType =应用程序/ PDF
Response.AddHeader（内容长度，buffer.Length.ToString（））;
Response.BinaryWrite（缓冲液）;
 

解决方案

您也可以使用 asp.hyperlink 。就像下面

＆LT; ASP：超链接ID =hyperlink1NavigateUrl =＆LT; set_from_ code_behind＆gt;中文本=TEXT重定向=服务器/＆GT;

和从code设置NavigateUrl背后如下。

hyperlink1.NavigateUrl =上传/+ ds_row [附件]的ToString（）;

Earlier developer had put this code using a label and it was turned into a hyperlink during the run time.

<asp:Label ID="lbl_Attachment" runat="server">
</asp:Label>

lbl_Attachment.Text = "<a href='../Uploads/" + 
                      ds_row["Attachment"].ToString() + "'>" + 
                      ds_row["Attachment"].ToString() + "</a>";

But this is not working. So I changed the code to the following to open the any file (image/pdf/word) in a new browser tab and the error persists:

      hyperlinkAppDoc.NavigateUrl = 
          ResolveUrl("../Uploads/" + 
          ds_row["Attachment"].ToString());
      hyperlinkAppDoc.Target = "_blank";  

What can I do to fix this issue? MIME types are available in the IIS.

---

UPDATE: I am trying out a different approach. However the Server.MapPath is poiting at local drive instead of wwwroot. How can I point the path to wwwroot folder?

string pdfPath = Server.MapPath("~/SomeFile.pdf");
WebClient client = new WebClient();
Byte[] buffer = client.DownloadData(pdfPath);
Response.ContentType = "application/pdf";
Response.AddHeader("content-length", buffer.Length.ToString());
Response.BinaryWrite(buffer);

解决方案

You could have used asp.hyperlink. Like following

<asp:HyperLink id="hyperlink1" NavigateUrl="<set_from_code_behind>" Text="Text to redirect" runat="server"/>

And set NavigateUrl from code behind as following.

hyperlink1.NavigateUrl= "Uploads/" + ds_row["Attachment"].ToString();

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