C# - Error With Content-disposition?

May 17, 2010

how should I handle an exception that occurs after sending a Content-Disposition header for an attachment? I'm trying to generate a report at server and send it as a file, but if an exception occurs during the report generation, the error message itself is sent to browser which still takes it as a content of a file and shows a Save As dialog. User cannot know there was an error generating report, saves the file which is in wrong format now.Is there a way to cancel the response with this header and redirect to an error page? Or what else can I do to inform user about the error?

Probably I could generate the report first and only if there was no error send the headers, but I want the report render directly to the Response output stream so that it does not need to stay in memory.

Here is my code:

this.Response.ContentType = "application/octet-stream";
this.Response.AddHeader("Content-Disposition", @"attachment; filename=""" + item.Name + @"""");
this.Response.Flush();
GenerateReportTo(this.Response.OutputStream); // Exception occurs

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Web Forms :: Content-disposition Attachment Filename=?

Feb 15, 2008

Those of you who've dealt with transferring files via Response will understand the subject line. Basically I'm doing:Response.AppendHeader("content-disposition", "attachment; filename=" + myFilename);But how can I appropriately encode the filename? The simplest example being a space. Without doing any encoding, the filename presented to the user in the download window is cut off at that space. HtmlEncode suffers the same problem, and UrlEncode replaces space with a '+', which isn't translated at the client-side, so they just end up with '+' in their filename wherever there should be a space.

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Web Forms :: Using The Content-disposition Header To Force A File Download?

Dec 10, 2009

I'm using the content-disposition header to force a file download in ASP.NET.

It works, but my problem is that in the save dialog (in any browser), it doesn't seem to know the total file size. (In Internet Explorer, for example, it says Estimated time left: Unknown (Opened so far: XXX)

I thought I had encountered this in the past and fixed by also adding the content-length header. But this doesn't seem to have any affect.

Here's my code (part of the ProcessRequest method of IHttpHandler):

var file = new FileInfo(context.Server.MapPath(path));

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Jul 2, 2010

I want to open docx file in IE from asp.net. The IIS has mime type correctly mapped. I can open pdf fine but docx will always prompt me to download like content-disposition='attachment'. Is there any setting to be done?

[code].....

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Exporting GridView To XML To The Local Machine - Content-Disposition Fails (repost)?

Jul 7, 2009

I've got the followig:

sName = Session("uid") & " " & Session("outType") & Date.Today.Date.ToString
sName = Replace(sName, "/", "-")
sName = Replace(sName, ":", "-")

[code]...

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C# - Response.AddHeader("Content-Disposition") Not Opening File In IE6?

Oct 8, 2010

I'm using Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.HtmlEncode(FileName)); to pop a 'open/save file' dialog for the users, so that they can download an file on to their local machines.

This is working good normally in IE7,But on IE6 the file is not opening when user click on the open button in 'open/save file' dialog. I gone through the net and found that Response.AddHeader("Content-Disposition", "inline; filename="+Server.HtmlEncode(FileName)); should be provide to work that in IE6,and its works fine..

But the issue is most of the files that can open in browser opens on the page itself.. ie user on a mail page and click download an image file it opens there,, i need it to open in another window as in case of IE7 what can i do... other files that cannot open in bowser open with current application in system ie(word,excel etc)..

The Code i used is here....

Response.AddHeader("Content-Disposition", "attachment; filename=" +FileName);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = ReturnExtension(file.Extension.ToLower());
Response.TransmitFile(file.FullName);
Response.End();
private string ReturnExtension(string fileExtension)
{
switch (fileExtension)
{
case ".txt":
return "text/plain";
case ".doc":
return "application/ms-word";
case ".xls":
return "application/vnd.ms-excel";
case ".gif":
return "image/gif";
case ".jpg":
case "jpeg":
return "image/jpeg";
case ".bmp":
return "image/bmp";
case ".wav":
return "audio/wav";
case ".ppt":
return "application/mspowerpoint";
case ".dwg":
return "image/vnd.dwg";
default:
return "application/octet-stream";
}
}

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Sep 28, 2009

I am trying to convert a web form into a User control as suggested in this link:

[URL]

But I am getting an error in the designer: Content control can only be used in a content page.

I am surprised that I could'nt find anything on the internet for same.

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Nov 17, 2010

I bought a website a few years ago, hosted with WebHost4Life,. Since their migration their has been nothing but problems with my site, however, I am stuck because I don't have the knowledge to move it, have tried with no success. Anyway, recently I have been getting parser error messages, Webhost fixed them, and then it starts over again. It takes them weeks to get around to it and since its my livelihood, I can't afford for the site to be down for 5 days then running for one day. I've tried to contact the guy that built the site to no avail, he won't answer my emails.

why these parser errors keep happening. This is a recent thing from the past 2 months, never had this before. What can I do to stop it. it looks like the knowledge here is unreal, I'm in awe everytime I read your answers. BTW, heres my lastest parser error:

Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Only Content controls are allowed directly in a content page that contains Content controls. Source Error:

[Code]....

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Jun 21, 2008

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Jun 1, 2009

I am a novice at .net and am trying to get to the bottom of a problem with a website application that has been developed for myself. As a background, the website is hosted on a shared windows host. It speaks to a MSSQL2008 database and currently we are unable to get the index.aspx to work. There are other pages which at least present errors when you directly enter their URL, however the index.aspx tries to download a file rather than process the file with .NET. The hosts have informed us that the problem lies with our code. The index.aspx has the following code:

<%@ Page Language="C#" AutoEventWireup="true" Inherits="domainname.Controller" Trace="false" Codebehind="index.aspx.cs" MasterPageFile="~/templates/domainname.master" %>

There is no index.aspx.cs! i thought this was the problem but our develioper has informed us that it is a complied application and thats not a problem. The hosts have said that our application throws an error as below: The error from your weblogs is: HTTP/1.1 500 Internal Server Error Cache-Control: private Content-Type: text/html; charset=utf-8 Server: Microsoft-IIS/7.0 X-AspNet-Version: 2.0.50727 X-Powered-By:
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If i change the file name from index.aspx to default.aspx then we are presented with an error which is progress at least. Having worked on IIS in the past to me this means that index.aspx is not on the list of default documents. However the hosts argue that it is on there. When we run the files as default.aspx we are presented with: Server Error in '/' Application................

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Nov 16, 2010

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why this is happening with static content on a ASP.NET MVC site? I want to say it's something to do with the url routing handlers.

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Nov 24, 2009

Error Creating Control - Content

Content controls can only be used in a content page.

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Jan 20, 2009

I have created content deployment job for deploying contents from staging server to production server.

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[code]....

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Jan 29, 2010

I have the following code behind that was, until recently, working fine and dandy!

tbxProdAC.Attributes.Add("onclick", "$('#" + GridView1.ClientID + "').remove();
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Feb 16, 2009

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Mar 7, 2010

I am trying to use an XML as a datasource in ASP and then display it as a datagrid. The XML has the following format:

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<people type="array">
<person>[code]....

When I try to run the simple page I receive the following error

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Here is my page code

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Sep 10, 2010

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[Code]....

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Oct 13, 2009

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[Code]....

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[Code]....

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Oct 5, 2010

The WorldPay payment gateway suggests using this HTML to take the customer to the payment page:

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Dec 1, 2009

1 - Here is what i have for my master page

[Code]....

2 - i have a menu set up on the master page and want to be able to have pages linked from the menu items into the content. What do I need to do to make that work?

here are the errors i am getting

Error 1 Make sure that the class defined in this code file matches the 'inherits' attribute, and that it extends the correct base class (e.g. Page or UserControl). C:MyDocsVisual Studio ProjectsMy ProjectsMyWebSiteDefault.aspx.cs 8 33 C:...MyWebSite

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Error 4 'ASP.default_aspx.ProcessRequest(System.Web.HttpContext)': no suitable method found to override c:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Filesmywebsitef75149ab9395c70cApp_Web_kqzprpfz.0.cs 288

Error 5 'ASP.default_aspx' does not implement interface member 'System.Web.IHttpHandler.IsReusable' c:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Filesmywebsitef75149ab9395c70cApp_Web_kqzprpfz.0.cs 143

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Oct 17, 2010

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[code]....

and the error is :(in line *)

Error 17 'System.Web.UI.MasterPage' does not contain a definition for 'SetMetaTags' and no extension method 'SetMetaTags' accepting a first argument of type 'System.Web.UI.MasterPage' could be found (are you missing a using directive or an assembly reference?)

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