How to export dataset to xls and save on server harddisk

Question

I used the following code to convert a dataset into xls. It works fine but it throws an error. (Some formatting problem)

I want to save an xls file created in a specific location without the user's permission.

conn.Open();
SqlDataAdapter getData = new SqlDataAdapter("SELECT * FROM profile", conn);
data.Clear();
getData.Fill(data);
conn.Close();
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.Charset = "";
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename=\"" +"siv" +"\"");
using (StringWriter sw = new StringWriter())
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
    DataGrid dg = new DataGrid();
    dg.DataSource = data.Tables[0];
    dg.DataBind();
    dg.RenderControl(htw);
    response.Write(sw.ToString());
    response.End();
}

Answer 1

That is obviously not possible because that would pose an enormous security risk . You can't drop files onto the users hard drive.

There is no workaround that doesn't require the users consent. If there was I'd be very nervous to use a web browser...

If you manage to do this you probably are rewarded 50,000$ in cash by Google as part of their security reward program.