how to call Response.Redirect after Response.TransmitFile

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how can we call response.redirect after Response.TrsnsmitFile

Posted 12-Jun-13 20:44pm

mahakaal

Updated 6-Jun-17 19:33pm

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Prasad Khandekar 13-Jun-13 3:07am

Hello,

Unfortunately you can not call Redirect after TransmitFile. According to the MSDN documentation for Response.Redirect(string url), it will throw an HttpException when "a redirection is attempted after the HTTP headers have been sent". Since Response.Redirect(string url) uses the Http "Location" response header (http://en.wikipedia.org/wiki/HTTP_headers#Responses), calling it will cause the headers to be sent to the client. This means that if you call it a second time, or if you call it after you've caused the headers to be sent in some other way, you'll get the HttpException.

What you can instead do is to redirect to a page with meta-refresh tag (http://en.wikipedia.org/wiki/Meta_refresh) in the <head></head> section, pointing to the download url. This way the redirected page would show up in the browser first and then after a while file will get downloaded.

e.g. <meta http-equiv="refresh" content="5; url=http://example.com/getFile?id=537373">

Regards,

mahakaal 13-Jun-13 4:18am

Thanx Prasad for your sharing valuable info...

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 13-Jun-13 4:38am

Please check my answer.

mahakaal 13-Jun-13 8:52am

Tadit, thanks as your suggestion has worked for me.. but would you help me if i will try to solve the same issue with different approach...

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 13-Jun-13 8:54am

Most welcome. So, what is the different approach? Explain.

mahakaal 13-Jun-13 9:02am

it's not actually a different approach. Right know i am saving the pdf generated from crystal report on my server than i am sending it to browser.. Can i directly send the pdf to browser without saving it..

Below is my code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.CrystalReports;
using CrystalDecisions.Shared;
using CrystalDecisions.Web;
using CrystalDecisions.Reporting;
using CrystalDecisions.ReportSource;
using System.Data.SqlClient;
using System.Configuration;
using System.Threading;
public partial class SaveJobCard : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

string PDFName,temp;
if (Request.QueryString["jobid"].ToString() != "")
{
PDFName = Request.QueryString["jobid"].ToString();
temp = PDFName;
PDFName=PDFName.ToString();
PDFName = Environment.GetFolderPath(Environment.SpecialFolder.Desktop)+"\\temp\\"+ PDFName + ".pdf";
}
else
{
PDFName = "report";
}
using (SqlConnection con = new SqlConnection())
{
con.ConnectionString = ConfigurationManager.ConnectionStrings["dsd"].ConnectionString;
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "Delete from JobCard";
cmd.ExecuteNonQuery();
cmd.CommandText = "INSERT INTO JobCard(jobno,job_name,Bill_noBill,job_type,department,login_date,dispatch_dateTime,dmode,company_name,Client_department,contact_person,contact_no,Email_id,Delivery_addl1,Delivery_addl2,Delivery_addl3,Delivery_City,Delivery_State,Delivery_Pin,PMethod,PO_Date,PO_No,Paper_type,Paper_size,Grammage,qty,LPrint_Remark,lBind_Remark,LDispatch_Remark,dispatched,delivered,challan_ready,SONo,acc_remarks,challan_no,Tran_Id,guid,printdoneby,printdonetime,bindingdonetime,bindingdoneby,loginby,Diff_Location,DLocation_path,Verify,Binding_remark,Cordinator_PrintingRemark,Dispatch_done_remark,Delivery_done_remark,Need_Form38,modify,consulted_person,C_media,Modification_remark,old_dispatch_date,overflow,PendingFromBinding,PendingFromPrinting,PendingFromChallan,BindingDoneRemarks,PrintingDoneRemarks,ItemRate,TotalAmount) SELECT jobno,job_name,Bill_noBill,job_type,department,login_date,dispatch_dateTime,dmode,company_name,Client_department,contact_person,contact_no,Email_id,Delivery_addl1,Delivery_addl2,Delivery_addl3,Delivery_City,Delivery_State,Delivery_Pin,PMethod,PO_Date,PO_No,Paper_type,Paper_size,Grammage,qty,LPrint_Remark,lBind_Remark,LDispatch_Remark,dispatched,delivered,challan_ready,SONo,acc_remarks,challan_no,Tran_Id,guid,printdoneby,printdonetime,bindingdonetime,bindingdoneby,loginby,Diff_Location,DLocation_path,Verify,Binding_remark,Cordinator_PrintingRemark,Dispatch_done_remark,Delivery_done_remark,Need_Form38,modify,consulted_person,C_media,Modification_remark,old_dispatch_date,overflow,PendingFromBinding,PendingFromPrinting,PendingFromChallan,BindingDoneRemarks,PrintingDoneRemarks,ItemRate,TotalAmount FROM login where JobNo='" + Request.QueryString["jobid"].ToString() + "'";
cmd.ExecuteNonQuery();
cmd.Dispose();
con.Close();
}

ReportDocument printJ = new ReportDocument();

// string FileName = "test.rpt";

//Session["file"] = "yes";
printJ.Load(Server.MapPath("JobCard.rpt"));
printJ.SetDatabaseLogon("sa", "Perfact@1234", "192.168.1.7", "DispatchStatus");
printJ.Refresh();
ExportOptions CrExportOptions;
DiskFileDestinationOptions CrDiskFileDestinationOptions = new DiskFileDestinationOptions();
PdfRtfWordFormatOptions CrFormatTypeOptions = new PdfRtfWordFormatOptions();
CrDiskFileDestinationOptions.DiskFileName

mahakaal 13-Jun-13 9:05am

= PDFName;
CrExportOptions = printJ.ExportOptions;
CrExportOptions.ExportDestinationType = ExportDestinationType.DiskFile;
CrExportOptions.ExportFormatType = ExportFormatType.PortableDocFormat;
CrExportOptions.DestinationOptions = CrDiskFileDestinationOptions;
CrExportOptions.FormatOptions = CrFormatTypeOptions;
printJ.Export(CrExportOptions);
printJ.Dispose();
printJ.Close();
GC.Collect();
Response.ContentType = "application/pdf";
Response.AddHeader("Refresh", "3; url=joblogin.aspx");
Response.AppendHeader("Content-Disposition", "attachment; filename="+Request.QueryString["jobid"].ToString()+".pdf");

Response.TransmitFile(PDFName);

}

}

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 13-Jun-13 10:01am

Change the content-disposition to inline instead of attachment.

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Accepted Answer · 2013-06-12T22:19:00

Solution 1

Problem

The Response.Redirect() before the Response.End() will redirect, but the file is never going to be generated.
If you put the Response.Redirect() after the Response.End(), the file will be generated, but it will not redirect.

Solutions

Showing the thank you message at the beginning of the file generation.
Users are used to this anyway, and you can word it like: “Thanks. Your download will start in a second”. This is the most modern approach.
Refer - Redirecting to another page after Response.End() has been called in C#[^]
Quote:
I suggest to add a redirect header. Something like this:

C#
```
Response.AddHeader("Refresh", "3; url=index.html");
```
Where 3 is time delay and index.html is url you need to redirect to

Posted 12-Jun-13 22:19pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Updated 12-Jun-13 22:20pm

v2

Comments

mahakaal 19-Jun-13 0:47am

Tadit, the solution you gave me is working but not on all internet browsers.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 19-Jun-13 0:53am

Which solution you tried? Second one?
In which browser it is not working?

mahakaal 19-Jun-13 1:10am

either in chrome or firefox..
i had tried the second one.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 19-Jun-13 2:15am

Ok, then go for Solution 1, which is the most popular and modern one.

mahakaal 19-Jun-13 6:34am

Talit, i haven't try the 1st fmethod. but after trying the second method. i thought of doing this with the help of timer. which is serving my purpose. but i would want your suggestion on that. Below is the logic i have used for it.

on submit button
1. i am saving information into database
2. Saving the jobno into session variable session["temp_jobno"] and then reloading the page
3. on page load event if session["temp_jobno"] value is not null than calling a timer with interval of 1 sec.
4. on tick event of timer i am saving session value into a string variable(which is acutally jobno) and setting session["temp_jobno"]=null as well as disabling the timer control then sending the pdf to browser for dowload.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 19-Jun-13 6:53am

Ok... It sounds good. Is there any problem?

mahakaal 19-Jun-13 7:07am

it's working... but should i continue with this logic or should i give a try to 1st solution which you had shared.

but i couldn't get the first solution. how to do that ...

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 19-Jun-13 7:20am

If it is not working in some browsers as you have mentioned, so better to go for 1st solution.

Your goal is to redirect to another page and show thank you message.
So, as per solution 1, first you redirect to a page, then show a message saying "Thanks for downloading. Download will start in seconds.".
And then you write the logic to download in that page. Got?

For example -
http://www.opensubtitles.us/en/opensubtitles-player.save-subtitles/sub/5048801

mahakaal 19-Jun-13 7:26am

thanx, i got it.. i will try this method..

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 19-Jun-13 7:30am

My pleasure. Most welcome. :)

mahakaal 19-Jun-13 7:37am

i have checked the link but after the download user will have to manually get back to the page from where they had made request.

after download they are not reloading the page. they are just sending file to browser.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 19-Jun-13 8:27am

Actually I gave that link to just show you how they are first opening the thank you page and then downloading after some time.

Your logic may be different according to your code. Just try to open the thanks page before the download.

mahakaal 19-Jun-13 9:01am

Thanks Talit

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 19-Jun-13 9:51am

Welcome... And my name is Tadit :P