download files from gridview

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C#

ASP.NET

SQL-Server

, +

hi friends,
I want to download files and the file path is in database. by using grid view if I select the specific file in gridview I want to download the data.

I am using link button in grid view to download files

my code is given below

public void filedownload()
    {
        con.Open();
        string command="select * from tblname where int_filename="+FileUpload.FileName+"";
        string path = Server.MapPath("images\\" + command);
        FileInfo file = new FileInfo(path);
        Response.Clear();
        Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
        Response.AddHeader("Content-Length", file.Length.ToString());
        Response.ContentType = "application/octet-stream";
        Response.WriteFile(file.FullName);
        con.Close();
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
           string p = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "FileName"));

        }
    }
    
protected void  GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
        GridViewRow row = GridView1.SelectedRow;
}
protected void  GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
        GridViewRow row = (GridViewRow)(((LinkButton)e.CommandSource).NamingContainer);
        LinkButton lblProdId = (LinkButton)row.FindControl("FileName");
       string s=lblProdId.Text;  
        if (e.CommandName == "filedownload")
        {

            filedownload();
        }
    }