How to download file from Gridview in asp.net?

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I want to download file from gridview link button uploaded by respective user but getting exception

'E:/Latest_jobportal/jvportal/Uploads/purushottam.kumar/purushottam.kumarCV.docx' is a physical path, but a virtual path was expected.

my code is as follows

C#

if (e.CommandName == "cmd")
        {
            string filename = e.CommandArgument.ToString();
            if (filename != "")
            {
                string path = MapPath(filename);
                byte[] bts = System.IO.File.ReadAllBytes(path);
                Response.Clear();
                Response.ClearHeaders();
                Response.AddHeader("Content-Type", "Application/octet-stream");
                Response.AddHeader("Content-Length", bts.Length.ToString());

                Response.AddHeader("Content-Disposition", "attachment;   filename=" + filename);

                Response.BinaryWrite(bts);

                Response.Flush();

                Response.End();
            }
}

}

Posted 6-May-14 22:43pm

Member 10310320

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Member 10310320 7-May-14 5:26am

Can any one Help me??

2 solutions

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Darshan.Pa · Answer 1 · 2014-05-06T22:49:00

Solution 1

In cs file add following

C#

protected void DownloadFile(object sender, EventArgs e)
   {
       string filePath = (sender as LinkButton).CommandArgument;
       Response.ContentType = ContentType;
       Response.AppendHeader("Content-Disposition", "attachment; filename=" + Path.GetFileName(filePath));
       Response.WriteFile(filePath);
       Response.End();
   }

In aspx file add Templatefiled in Columns in Gridview

XML

<asp:TemplateField HeaderText="Download" HeaderStyle-Width="7%">
                  <ItemTemplate>
                      <asp:LinkButton ID="lnkDownload" Text="Download" CommandArgument='<%# Eval("FilePath") %>' runat="server" OnClick="DownloadFile"></asp:LinkButton>
                  </ItemTemplate>
              </asp:TemplateField>

Posted 6-May-14 22:49pm

Darshan.Pa

Comments

Member 10310320 7-May-14 4:56am

Do I have to remove my previous code from rowCommand event?????

Member 10310320 7-May-14 5:22am

No this code is not working.....

Darshan.Pa 7-May-14 5:33am

it is not like that, you copy and paste code given and it will run.
you have to change code as per your requirement. I can give you solution not exact code as per your requirement

Member 10310320 7-May-14 5:52am

I have used this code according to my requirement this time i am not getting any exception....but my problem remain the same file is not downloading..

Darshan.Pa 7-May-14 7:11am

make sure value coming fom database is like for ex. "~/docs/041609-1145.TXT".

Member 10310320 8-May-14 0:44am

its not like that but proper path is coming from database whatever saved there...

Member 13416095 24-Jan-20 9:30am

code working fine!!!!

DamithSL · Answer 2 · 2014-05-06T23:27:00

Solution 2

since you already has real path, you don't need MapPath

C#

byte[] bts = System.IO.File.ReadAllBytes(filename);

Posted 6-May-14 23:27pm

DamithSL

Updated 6-May-14 23:28pm

v2

Comments

Member 10310320 7-May-14 5:35am

I removed MapPath still its not working