I have a page that exports large amount of data to excel 2007 macro enabled format. I have Response.Redirect at the end to redirect to another page after the excel file is created but the redirect does not work when I have really large amount of data i.e about 60,000+ rows.
Below is the snippet of the code that I am using to save the excel file:
Response.Clear();
Response.AppendHeader("content-disposition", "attachment; filename=RegionData.xlsm");
Response.ContentType = "application/octet-stream";
wbRegionData.Save(Response.OutputStream);//();
Response.End();
Response.Redirect("RegionData.aspx?PALID=" + AVListID, true);
Thank you for your help.
You cannot do a file download and a redirect in the same server response. If you need to perform a redirect after a successful file download you will need to somehow tell the client that a file download successfully occurred which can only be accomplished by writing a cookie as far as I know.
I have created the jQuery File Download plugin (Demo) (GitHub) (Blog Posts) that simplifies a lot of this stuff, using the plugin your code could be like this:
ASP.NET CODE:
Response.Clear();
Response.AppendHeader("content-disposition", "attachment; filename=RegionData.xlsm");
Response.ContentType = "application/octet-stream";
Response.SetCookie(new HttpCookie("fileDownload", "true"){Path = "/"});
wbRegionData.Save(Response.OutputStream);//();
Response.End();
JavaScript:
$.fileDownload("/urltofiledownload/", {
successCallback: function (url) {
window.location = "/redirecturl/";
}
});
Without more of your code I can't give you a complete solution (look at the Demo for examples) but I think using the plugin would be your easiest and best bet.
You can't because you are closing the response by calling Response.End(); You must have to add define these two actions separately (Download and redirection).
It will not work because the Respose.End() Method stop the normal execution of the page, I have refatored your code and delete de Response.End() Method, now it's work.
Response.Clear();
Response.AppendHeader("content-disposition", "attachment; filename=RegionData.xlsm");
Response.ContentType = "application/octet-stream";
wbRegionData.Save(Response.OutputStream);//();
Response.Redirect("RegionData.aspx?PALID=" + AVListID, true);
Related
I have the following code that downloads a file to the client's machine and it works great. However, I also need to ask the user where they want to save the file before the download begins.
Is this something I do in the action method (someone in the below code) or is this an option the client has to set on his/her browser and independent of what my code does?
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.Clear();
response.ContentType = "text/plain";
response.AddHeader("Content-Disposition", "attachment; filename=" + fileName + ";");
response.TransmitFile(filePath + fileName);
response.Flush();
response.End();
Yes, "this an option the client has to set on his/her browser and independent of what my code does".
As best I can tell, that is the responsibility/behavior of the browser. If you want more client side control, you would have to write a client side app to save off to a specific location, or (easier) have the end user configure their browser to ask where to save downloads to.
I'm newbie on asp.net, i am developing Online Report Generator, i want to let the client to choose where he/she want to put his/her files so this is my code but didn't seems to work, it returning to my ajax error statement my ConfigurationManager.AppSettings["ExtractFolder"] is equal to "c:\temp\": just want to ask what's wrong with the code?
context.Response.ContentType = "application/vnd.ms-excel";
context.Response.AddHeader("content-disposition", "attachment;filename="+filename);
context.Response.WriteFile(ConfigurationManager.AppSettings["ExtractFolder"]+filename);
context.Response.Flush();
context.Response.End();
Try this
String FileName = "FileName.txt";
String FilePath = "C:/...."; //Replace this
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.Clear();
response.ContentType = "text/plain";
response.AddHeader("Content-Disposition", "attachment; filename=" + FileName + ";");
response.TransmitFile(FilePath);
response.Flush();
response.End();
For more content types check our http://en.wikipedia.org/wiki/MIME_type#List_of_common_media_types
Basically you can't do what you want to do the way you are trying to do it.
The ASP.net code that you have is dependant on being part of a full http Request/Response cycle. The part where it is setting headers is where it telling the browser to download stuff.
An AJAX request is looking for a specific return with its request, generally javascript passable data. You are not returning this but rather the contents of a file.
Here's an article the explains the concepts and problems a little more. It also provides you an alternate solution. Basically the solution revolves around using an iFrame to handle the file download request.
First, check that your source file you want to send to the user is in c:\temp\ and that you have set filename to the name of the file you are sending. Next you will want to make sure that your .net process has permission to c:\temp on your server. It probably doesn't.
Also, make sure you understand that response.writefile actually reads a file from the server and writes it out to the browser. You can't specify where the user saves the file to locally, this is handled by the browser not by your code.
Using Coders sample code make sure you change the following (see my comments)
String FileName = "FileName.xlsx"; //MAKE SURE THIS IS YOUR EXCEL FILENAME ON YOUR SERVER
String FilePath = "C:/...."; //SET THIS TO THE FOLDER THE FILE IS IN (put your file in your root folder of your website for now, you can move it later once you get the download code working)
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.Clear();
response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; //MAKE SURE YOU HAVE CHANGED THIS TOO
response.AddHeader("Content-Disposition", "attachment; filename=" + FileName + ";");
response.TransmitFile(FilePath);
response.Flush();
response.End();
I also suggest trying the above in a standalone page first then incorporate it into your AJAX page once you know its working.
I have a function in ASP that returns a TXT file.
I want the user to download the file but the browser wanted to keep displaying it when I did Response.Redirect("/Dir/Dir/TextFilePath.txt");
So I discovered that if you add this to the header it forces a download
Response.AddHeader("content-disposition",
"attachment;filename=/Dir/Dir/TextFilePath.txt");
And this DOES force download the file, with one catch.
The file is the aspx source code and not my txt file.... It's named correctly but it is most definitely not the txt file.
here is a correct way to download files in asp.net.
note the 'a correct way' and not 'the correct way', you can do it in other ways but this one works for me.
try
{
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.AddHeader("content-disposition", "attachment; filename=" + _Filename);
Response.AddHeader("Content-Type", "application/Word");
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Length", _FileLength_in_bytes);
Response.BinaryWrite(_Filedata_bytes);
Response.End();
}
catch (ThreadAbortException)
{ }
finally
{
}
the example above transmits a word file by sending it as a byte array.
you dont have to do it this way, but it works.
also i would like to add for anyone who decides to use my method,
this WILL throw a ThreadAbortException at Response.End().
its a known issue and it affects nothing, everything is being executed correctly but the exception is still thrown, so it must be caught.
You can't affect the headers of the URL supplied for the redirect from the page where the redirect was issued from. I suspect that you actually want to do something like:
var responseText =
File.ReadAllText(Server.MapPath("~/Dir/Dir/TextFilePath.txt"));
Response.ContentType="text/plain";
Response.AddHeader("content-disposition",
"attachment;filename=TextFilePath.txt");
Response.Output.Write(responseText);
Response.End();
Have you tried something like this?
this.Response.AddHeader("content-disposition", "attachment;filename=" + file);
Response.TransmitFile( Server.MapPath(fileName) );
Response.End();
My web application have a download button and when the client click it, it must show a message saying that file was already downloaded.
Here is the code to download:
FileInfo arquivo = new FileInfo(pathCompletoArquivo);
FileInfo fInfo = arquivo;
Response.Clear();
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=\"" + fInfo.Name + "\"");
Response.AddHeader("Content-Length", fInfo.Length.ToString());
Response.WriteFile(fInfo.FullName);
Response.Flush();
I want to show a message to the client after this, I tried popups, javascripts... but nothing would work.
Obs.: Dont need to show the message when the download is concluded.
You cannot do this on the same HTTP response that also sends the file contents back.
What you need to do is add a click handler on the download button that displays a popup if the file has been downloaded, and makes the actual request to download the file (that runs the code you show us) if it has not. You would do that using JavaScript.
Looks like your on the right track. Make sure you check Response.IsClientConnected when writing to the response stream.
This is my problem.
I load xml from my database and push it to the client using code.
But the problem is that the browser automatically opens that xml instead of offering it as a download.
Is there a way to force your browser to download that file and not showing it?
I'm working in a C#, Asp.net environment (with IIS7).
Thx
protected void DisplayDownloadDialog()
{
Response.Clear();
Response.AddHeader(
"content-disposition", string.Format("attachment; filename={0}", "filename.xml"));
Response.ContentType = "application/octet-stream";
Response.WriteFile("FilePath");
Response.End();
}
This will force to download the file and not display in the browser.
This will work for any file types
without requiring to specify any
special MIME type.
This is explained in this article: http://www.xefteri.com/articles/show.cfm?id=8
The key is in this line:
Response.AddHeader("Content-Disposition", "attachment; filename=" & file.Name)
Add a content-disposition: attachment header.