Web Forms :: Stream A File And Update Page?
Jul 28, 2010
I don't think there is a way around this but figured I'd ask... We have an application where a user can generate PDF documents that are streamed to the browser. There is some additional functionality going on behind the scene and I would like to be able to display a message to the user (via updating a literal tag on the page). I don't get any errors when doing this but the page isn't updated and the message isn't displayed. My guess is that streaming the document blocks any other content from going down to the client. In particular, we're using CeTe Dynamic PDF and calling one of their methods but I think it's essentially just doing a Response.BinaryWrite to stream out the PDF.
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Feb 22, 2011
I have an excel file in my Response Output stream. I can Open the stream as a file after a prompt, but it doesn't seem I can save it directly to a specified folder on my client.
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Mar 15, 2011
I have an ASP.NET page with a text status and a button to export an Excel file. When the user clicks the button, I want to generate the file on the fly and return it to the client as binary stream. Then I want to change the text status to show success/failure.
So far I can generate and send the file no problem, but obviously the statuses don't get displayed, since the server response was used to send the file and not a new updated page with the new status.
I'm not sure what's the cleanest way to approach this. I can think of something but is it the best way:
User clicks on button. File is generated and saved as a stream in the session. Statuses are updated and the page with the new statuses is returned to the client. A piece of Javascript on the page opens a 3rd party page which retrieves the saved stream from the session.
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Jul 19, 2010
i will be passing the xml file like this:
[code]....
error:
Error 1 The best overloaded method match for 'System.Xml.Linq.XDocument.Load(string)' has some invalid arguments
cannot convert from 'System.IO.Stream' to 'string'
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Sep 23, 2010
I changed an app so one of the edit screens opens as a pop-up window via showModalDialog. Previously everything was done in the same window and more back and forth navigation was required. The pop-up provides greater continuity. Unfortunately, as a pop-up, files will not stream to the desktop. If I bring up the page by entering a URL on the address line, so it is not a pop-up, files stream to the desktop OK.
Streaming a file to the desktop is done as follows:
[Code]....
This causes an open/save/cancel dialog to appear in the browser. Does anyone have an idea why a file cannot be streamed to a pop-up window? To get pop-ups to work I always include
[Code]....
in the header. That way I can open other pop-ups such as warnings and database error messages from a prvious pop-up.
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Oct 8, 2010
I have a third party CMS system that can create forms but can't manage true File upload capabities. I am able to get users brows for thier file and have the value submited to my custom .net code behind page for processing. So I end up with like "C:somefilefoldersomefile.doc".
But on my processing page I want to read this file (like the file uploader) and save it to a location. I tried using the file uploader control (but have it not visible) but realized I can't preset it as I was planning to set it and do the normal processing from there. Is there another way to do this?
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Sep 20, 2010
Is is possible to update an image on an HTML page using the response stream of an ASP.NET Generic Handler? For example, if I have the following code on a handler: [URL]
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "image/png";
context.Response.WriteFile("~/images/test.png");
}
How can I call the handler in jQuery, using .ajax, and set an image on the page equal to the image that is returned by the Handler? I am ignoring the query string variable at the moment as I just want to get this working. Secondly, if I can do above, how can I loop through all of DIVs on the page that are of class "content", select a guid out of a hidden field to use as my query string parameter, and update the associated image within the same content DIV tag? A content div tag would look as follows:
<div class="content">
<asp:TextBox runat="server" Id="HiddenField_1" Value="C142E68F-B118-4565-9A9E-B2347F0B6D5B"/>
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</div>
<div class="content">
<asp:TextBox runat="server" Id="HiddenField_2" Value="GJ38AD23-B118-4565-9A9E-B2347F0B6D5B"/>
<img src="#"/>
</div>
I would like to have all the images updated on a periodic interval, so essentially, as a quick recap, I would need to have: A loop through all of my DIVs of class "content", occuring every n. seconds. Extractation the GUID from the hidden field. A call to my ASHX handler to get the updated image. Set the returned image to the corrisponding image on the page. Is this something that would be difficult to achieve? If not, what would I need to do to make this function in the above manner?
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May 20, 2010
I'm using Filestream for read big file (> 500 MB) and I get the OutOfMemoryException. Any solutions about it?? I want this in my app asp.net: Read DATA from Oracle Uncompress file using FileStream and BZip2 Read file uncompressed and send it to asp.net page for download. When I read file from disk, Fails !!! and get OutOfMemory. My Code is:
using (var fs3 = new FileStream(filePath2, FileMode.Open, FileAccess.Read))
{
byte[] b2 = ReadFully(fs3, 1024);
}
// [URL]
public static byte[] ReadFully(Stream stream, int initialLength)
{
// If we've been passed an unhelpful initial length, just
// use 32K.
if (initialLength < 1)
{
initialLength = 32768;
}
byte[] buffer = new byte[initialLength];
int read = 0;
int chunk;
while ((chunk = stream.Read(buffer, read, buffer.Length - read)) > 0)
{
read += chunk;
// If we've reached the end of our buffer, check to see if there's
// any more information
if (read == buffer.Length)
{
int nextByte = stream.ReadByte();
// End of stream? If so, we're done
if (nextByte == -1)............................
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Oct 11, 2010
I am generating an Excel file upon a click of a button in an update panel. It is throwing a parsing error.
If I keep the button outside the update panel it is working fine. Why isn't it working in the update Panel?
Response.ContentType = "application/vnd.ms-excel"
Response.AddHeader("Content-Disposition",
String.Format("attachment;filename={0}", filename))
Response.Clear()
Response.BinaryWrite(WriteToStream.GetBuffer)
HttpContext.Current.ApplicationInstance.CompleteRequest()
Private Function WriteToStream() As MemoryStream
'Write the stream data of workbook to the root directory
Dim file As MemoryStream = New MemoryStream
hssfworkbook.Write(file)
Return file
End Function
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Dec 20, 2010
Assume we have the access to sth.avi on [URL] with a direct link.
e.g : [URL] Also we have a website => www.dl2.com.
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P.S: I don't wanna share this link [URL], actually I wanna share something like this link [URL]
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Aug 29, 2010
I have made a WCF web service that streams a 200 mb zip file. how i can read this stream at my client and then give option to the user to download that
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Feb 15, 2010
I have a DataTable that i want to convert it to xml and then zip it, using DotNetZip. finally user can download it via Asp.Net webpage.
My code in below
dt.TableName = "Declaration";
MemoryStream stream = new MemoryStream();
dt.WriteXml(stream);
ZipFile zipFile = new ZipFile();
zipFile.AddEntry("Report.xml", "", stream);
Response.ClearContent();
Response.ClearHeaders();
Response.AppendHeader("content-disposition", "attachment; filename=Report.zip");
zipFile.Save(Response.OutputStream);
//Response.Write(zipstream);
zipFile.Dispose();
the xml file in zip file is empty.
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Mar 16, 2010
I have a url that points directly to a wav file. Id like to extract the file from the url and save it to a file on our file system.
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Mar 19, 2011
I am trying to filestream to my hosting Companies sever.I have tried the below expecting it would not work. How can I find the correct path.Could not find a part of the path 'C:ERAPDFERA202.60.64.136.1.pdf'.
Exception Details: System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:ERAPDFERA202.60.64.136.1.pdf'.
Source Error:
[Code]....
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Aug 31, 2010
I have a wcf service that is used to download files. Its working alright (finally), but i can see that when it downloads the CPU usage goes around 75%.Client Code
FileTransferServiceClient obj = new FileTransferServiceClient();
Byte[] buffer = new Byte[16 * 1024];
CoverScanZipRequest req = new CoverScanZipRequest(
[code]...
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Feb 22, 2010
When user requests to download a document, I'm writing out a PDF file to HttpResponse using HttpResponse.OutputStream.Write method. It works in every browser except Firefox(3.5.8). In Firefox it sometimes displays the file and sometimes it displays the actual byte stream. When it displays a byte stream, http response is never finished. I see 'transferring data' status and the byte stream ends with EOF. After some time, I get 'connection was reset' window.
Here is response header:
HTTP/1.1 200 OK
Cache-Control: no-cache
Pragma: no-cache
Content-Length: 103185
Content-Type: application/pdf
Expires: -1
Server: Microsoft-IIS/7.0
X-AspNet-Version: 2.0.50727
Content-Description: stuff.pdf
Content-Disposition: inline;filename="stuff.pdf"
X-Powered-By: ASP.NET
Date: Mon, 22 Feb 2010 16:15:38 GMT
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Jan 22, 2011
I wrote an ASP.Net web page that will take a QueryString and stream a file to the client. The file is stored in a SQL Server database. Everything works great when I'm running the web site locally during development. When I run it in production from the server I can get a file through Firefox, but not Chrome. In Chrome I get Error 100 (net::ERR_CONNECTION_CLOSED): Unknown error.See some other posts that mention this could be related to Content-Length, however, I can't understand why this would work in development and not production. For that reason I think there must be something else going on here.Here is my code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim Data_ID As String = Request.QueryString("Data_ID")
Using dt As New Enterprise_Error_Log.Field_FileDataTable
[code]...
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Jan 20, 2011
I have an httpmodule and it has a handler for OnEndRequest. I am trying to write the HttpContext.Response.OutputStream to a file. I am trying to use the Read method of it. But when it is called the exception message i get is "Specified method is not supported". So i am not able to do what i want that is, write the response to a file on the disk. I am able to write the HttpContext.Request.InputStream to a file using its Read method which i do in a handler for OnBeginRequest.
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Feb 8, 2011
Is there a library that can be used to stream FLV from IIS server and play it in ASP.NET page using C#?
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Feb 15, 2011
I need to to export a file to the user. It takes 1-2 min to generate the file so I'd like to have the page go into a kind-of modal mode with a layover on the page and a 'Working' spinner showing. The problem is I can't make the modal stuff go away after Save File dialog is closed.
How can I remove the layover after the dialog is done?
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Oct 26, 2010
I put together a download script after some wonderful help from stack overflow the other day. However I've now found that after the file has been downloaded I need to reload the page to get rid of the progress template on the aspx page. The code to remove the template worked before I added in the download code.
Code to remove progress template: upFinanceMasterScreen.Update();
I've tried calling putting this before and after the redirect to the IHttpHandler
Response.Redirect("Download.ashx?ReportName=" + "RequestingTPNLeagueTable.pdf");
[code]...
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Mar 25, 2010
I'm working on a web app and need to stream various files. I can do pdfs, images, and older Office documents. However, when I try to do with 2007 documents, it breaks. Here is my code:
Response.Buffer = true;
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
switch (FileExtension.ToLower())
{
case "pdf":
Response.ContentType = "application/pdf";
break;
case "doc":
Response.ContentType = "application/msword";
break;
case "docx":
Response.ContentType = "application/vnd.ms-word.document.12";
break;
case "xls":
Response.ContentType = "application/vnd.ms-excel";
break;
case "xlsx":
Response.ContentType = "application/vnd.ms-excel.12";
break;
default:
Response.ContentType = "image/jpeg";
break;
}
Response.BinaryWrite(buffer);
The error that I get is:
An invalid character was found in text content. Error processing resource 'http://DomainName/GetFile.aspx.
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Aug 4, 2010
i have my master page with one update panel working like a banner, so when the timer do tick every 5 sec
the image change. That works fine, but i have an update panel in my index page, this update panel works with some buttons that change the text inside the panel when click.
Now, the problem.
When i click one button to change the text and the banner change, the text returns to his default text. The update in master page is affecting the update on index page.
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Jul 14, 2010
how to take clone of an Input Stream. I want to take clone of file uploaded through file upload control. ie clone of fileUpload1.PostedFile.InputStream;
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Jan 24, 2011
iam going to make a web site that display online live video stream.in other words, there is event in my company and this event will be display in my website by video camera using asp.net . i dont know how to do is there a special camera should i use it, how to connect this camera to my site
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