ASP.NET Display File from FileUpload Control

Question

I have an HTML page (OK, ASP.NET) with a FileUpload control.

<asp:GridView ID="DocGrid" ShowFooter="True" AutoGenerateColumns="False" runat="server" DataKeyNames="doc_id,req_id,doc_name,doc_path" BorderStyle="Solid" BorderWidth="1px" BorderColor="Silver" Width="500px" BackColor="White">
  <Columns>
    <asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderText="Document">
      <ItemTemplate>
        <asp:HyperLink ID="HyperLink1" Text='<%# Bind("doc_name") %>' NavigateUrl='<%# Bind("doc_path") %>' Target="_blank" runat="server"></asp:HyperLink>
      </ItemTemplate>
      <FooterTemplate>
        <asp:FileUpload ID="fuFooter" runat="server" Width="350px" />
      </FooterTemplate>
    </asp:TemplateField>
  </Columns>
</asp:GridView>

That isn't all of the HTML, but it should be everything needed to understand the question.

In VB code behind, the uploaded files are correctly saved using this bit of code:

Dim fuFooter As FileUpload = CType(DocGrid.FooterRow.FindControl("fuFooter"), FileUpload)
If (fuFooter.HasFile) Then
  Dim uploadDir As String = Server.MapPath(VIRTUAL_REC_DOCS)
  If Not String.IsNullOrEmpty(uploadDir) Then
    Dim item As New ReqDoc()
    item.doc_name = fuFooter.FileName
    item.doc_path = uploadDir & fuFooter.FileName
    fuFooter.SaveAs(item.doc_path)
    item.req_id = Request.QueryString("Req_id")
    DocReqManager.insertReqDoc(item)
    bindDocGridgrid()
  End If
Else
  lblMessage.Text = "No file attached."
End If

The files do, in fact, upload to my VIRTUAL_REC_DOCS folder and saves to the database.

After data binding, the items display in the form's HyperLink control.

screenshot

For whatever reason, clicking the HyperLink does NOT open the item.

Is there a problem with the way the NavigateUrl is displaying the path or is something else going on?

You need a relative path to the upload folder, not the absolute from the C drive. — Mansfield
– Mansfield, Commented Jul 10, 2013 at 14:53
Is there a simple solution? NavigateUrl='<%# Bind(Server.MapPath("doc_path")) %>' does not work. — user153923
– user153923, Commented Jul 10, 2013 at 14:57

Claudio Redi · Accepted Answer · 2013-07-10 15:30:06Z

1

You're using a physical path but you need to use the file Url. NavigateUrl should be something like

NavigateUrl='<%# YourPageClassName.VIRTUAL_REC_DOCS + Bind("doc_name") %>'

Where YourPageClassName is the name of your page class.

edited Jul 10, 2013 at 15:30

answered Jul 10, 2013 at 14:56

Claudio Redi

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5 Comments

user153923 Over a year ago

The page does not like my VIRTUAL_REC_DOCS defined in code behind. How would I define this in the HTML?

Mansfield Over a year ago

@jp2code just change item.doc_path to be VIRTUAL_REC_DOCS + item.doc_name.

Claudio Redi Over a year ago

@jp2code: where's VIRTUAL_REC_DOCS defined? is part of the page class?

user153923 Over a year ago

It is defined at the top of the code behind: Protected Const VIRTUAL_REC_DOCS As String = "~/ReqTrackerDocs/". Isn't my file uploading routine already doing this: item.doc_path = uploadDir & fuFooter.FileName (where uploadDir is Server.MapPath(VIRTUAL_REC_DOCS))?

Claudio Redi Over a year ago

@jp2code: it does the opossite: converts a url into a physical path. BTW, updated my answer

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