Question

I have a problem with file download. I have a grid which shows the file name and a link to download that file.
This is the code of my grid.

<asp:GridView ID="gv7" runat="server" AllowPaging="True" CssClass="tbl_green_parrot"
PageSize="5" Width="100%" AutoGenerateColumns="False" EmptyDataText="No Scheme data available" DataKeyNames="FilePath" OnPageIndexChanging="gv7_PageIndexChanging"             onrowdatabound="gv7_RowDataBound">
  <AlternatingRowStyle CssClass="tbl_green_parrot1" />
 <FooterStyle CssClass="tbl_green_parrotfoot" />
 <PagerStyle CssClass="tbl_green_parrotpager" />
 <SelectedRowStyle CssClass="tbl_green_parrotselect" />
 <EmptyDataRowStyle CssClass="tbl_green_parrotempty" />
 <Columns>
   <asp:TemplateField HeaderText="File Name">
   <ItemTemplate>
   <asp:HyperLink ID="lnkFile" Target="_blank" CausesValidation="false" runat="server"
   Text='<%# Bind("DisplayName") %>' NavigateUrl='<%# Bind("FilePath") %>' />
   </ItemTemplate>
   </asp:TemplateField>
   <asp:TemplateField HeaderText="Download" ItemStyle-Width="25px" ItemStyle-HorizontalAlign="Center">
   <ItemTemplate>
   <a id="lnkDLoad" href='<%# Bind("FilePath") %>' runat="server" target="_blank">
   <img src="Images/download.png" alt="Download" />
   </a>
   </ItemTemplate>
   <ItemStyle HorizontalAlign="Center" Width="25px" ></ItemStyle>
   </asp:TemplateField>
 </Columns>

Here I bind the filepath to the <a> tag. This code is running when I have the file in the same root folder in the website. But when I attempt to download the file which is inside the folder it doesn’t download.

The code behind for downloading:

DataTable new_dt = new DataTable();
    new_dt.Columns.Add("DisplayName");
    new_dt.Columns.Add("FileName");
    new_dt.Columns.Add("FilePath");
    string Query = "SELECT DisplayName,FilePath,Universal From DistScheme";
    dt = DataAccessLayer.DAL.getFromDataTable(Query);
    string filename = "";
    if (dt.Rows.Count > 0)
    {
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            DataRow new_dr = new_dt.NewRow();
            if (dt.Rows[i]["Universal"].ToString() == "False")
            {
                filename = DistributorID + "_" + dt.Rows[i]["FilePath"].ToString();
            }
            else
            {
                filename = dt.Rows[i]["FilePath"].ToString();
            }
            string filepath = Server.MapPath("Uploads/Scheme/") + filename;
            if (File.Exists(filepath))
            {
                new_dr["DisplayName"] = dt.Rows[i]["DisplayName"].ToString();
                new_dr["FileName"] = filename;
                new_dr["FilePath"] = filepath;
                new_dt.Rows.Add(new_dr);
            }
        }
    }
    gv7.DataSource = new_dt;
    gv7.DataBind();

How do I solve this problem?

Answer 1

Your file path should be start from “http”. Include complete path in the filepath like http://domian-name/foldername/filename with extenssion.