File Download inside iframe - asp.net

Question

I'm using following method to download a file.on a button click inside a iframe.it's working fine in every browser except IE.can some one plz suggest me a sollution
private void DownloadToBrowser(string filePath)
{
try
{
FileInfo file = new FileInfo(filePath);
Context.Response.Clear();
Context.Response.ClearHeaders();
Context.Response.ClearContent();
Context.Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
Context.Response.AddHeader("Content-Length", file.Length.ToString());
Context.Response.ContentType = "text/plain";
Context.Response.Flush();
Context.Response.TransmitFile(file.FullName);
Context.Response.End();
}
catch (Exception ex)
{
throw ex;
}
}

Answer 1

I would suggest removing the Context.Response.Flush(); line... I don't think it's necessary (as it will happen as part of Context.Response.End(); line), and maybe messing up how the browser receives the file on the next line.
Also, is the file you're transmitting definitely a plain-text file? If not, you'll need to provide a different Context.Response.ContentType();

Answer 2

You have most probably missed some HTTP response headers required by IE.
There is KB on microsoft web.
Also take a look at similar question on SO : PHP script to download file not working in IE

Answer 3

You could try something like this :
Context.Response.Buffer = true;
Context.Response.ContentType = "application/pdf";
Context.Response.AddHeader("Content-Disposition", "attachment;filename=" + FileName );
Context.Response.OutputStream.Write(dataBytes ,0,FileContentLength);
Also try adding this to your aspx page :
<%# Page aspCompat="True" other attributes %>

Answer 4

For Understanding I m using Dataset,
For download as a Excel File
Use Namespace:
using System.IO;
using System.Data;
DataSet ds = new DataSet("Table");
ds.Tables.Add("Table1");
ds.Tables[0].Columns.Add("Field1");
ds.Tables[0].Columns.Add("Field2");
ds.Tables[0].Columns.Add("Field3");
ds.Tables[0].Rows.Add();
ds.Tables[0].Rows[0][0] = "1";
ds.Tables[0].Rows[0][1] = "2";
ds.Tables[0].Rows[0][2] = "3";
HttpResponse response = HttpContext.Current.Response;
// first let's clean up the response.object
response.Clear();
response.Charset = "";
// set the response mime type for excel
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename=sample.xls");
// create a string writer
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
// instantiate a datagrid
DataGrid dg = new DataGrid();
dg.DataSource = ds.Tables[0];
dg.DataBind();
dg.RenderControl(htw);
response.Write(sw.ToString());
response.End();
}
}
For Download as a Word File
Replace
response.ContentType = "application/msword";
response.AddHeader("Content-Disposition", "attachment;filename=sample.doc");