I have a form that streams a pdf to the browser. That works fine, the problem is when the user clicks the "save" button on the PDf that has been streamed, it saves the .aspx page! as to how I can set it to default to .pdf?
View 6 RepliesI 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.
View 1 RepliesIm trying to resize an image. I have the original file and then try to resize it and save it to a new image.However, I get an exception because the value of stream cannot be null. This makes sense, but I dont know how to prevent it:
Value cannot be null.
Parameter name: stream
Description: An unhandled exception occurred during the execution of the current web request.
Source Error:
[Code]....
I'm making tests with ASP.NET HttpHandler for download a file writting directly on the response stream, and I'm not pretty sure about the way I'm doing it. This is a example method, in the future the file could be stored in a BLOB in the database:
public void GetFile(HttpResponse response)
{
String fileName = "example.iso";
response.ClearHeaders();
response.ClearContent();
response.ContentType = "application/octet-stream";
response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName);
using (FileStream fs = new FileStream(Path.Combine(HttpContext.Current.Server.MapPath("~/App_Data"), fileName), FileMode.Open))
{
Byte[] buffer = new Byte[4096];
Int32 readed = 0;
while ((readed = fs.Read(buffer, 0, buffer.Length)) > 0)
{
response.OutputStream.Write(buffer, 0, readed);
response.Flush();
}
}
}
When I open the url with the browser, appears the "Save File" dialog... but it seems like the server has started already to push data into the stream before I click "Save", is that normal? If I remove the line"response.Flush()", when I open the url with the browser, ... I see how the web server is pushing data but the "Save File" dialog doesn't come up, (or at least not in a reasonable time fashion) why?
When I open the url with a WebRequest object, I see that the HttpResponse.ContentLength is "-1", although I can read the stream and get the file. What is the meaning of -1? When is HttpResponse.ContentLength going to show the length of the response? For example, I have a method that retrieves a big xml compresed with deflate as a binary stream, but in that case... when I access it with a WebRequest, in the HttpResponse I can actually see the ContentLength with the length of the stream, why? What is the optimal length for the Byte[] array that I use as buffer for optimal performance in a web server? I've read that is between 4K and 8K... but which factors should I consider to make the correct decision. Does this method bloat the IIS or client memory usage? or is it actually buffering the transference correctly?
While exporting the html to Excel using Response.Write() in ASP.NET and when I try to save as the exported file I'm getting the default save as file type 'Web Page *.html, *.htm in excel application. Is there an any fix to get the default save as file type as xls or xlsx?
View 6 RepliesHow to save stream as image and store the image in temp files?
View 4 Repliesi 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'
I used below code for uploading image with fileupload control
string path = Server.MapPath(".") + "../image/estate/image";
string filename = System.IO.Path.GetFileName(fup3.PostedFile.FileName);
string[] validext = { ".jpg"};
string ext = System.IO.Path.GetExtension(fup3.PostedFile.FileName);
if (Array.IndexOf(validext, ext.ToLower()) < 0)
{
Label21.Text = "insert .jpg format";
[code]....
I want if users don't select any image from fileupload control in database it save this image name 'default.jpg'
the default ASP.NET Forms Authentication cookie sets it's name as ".ASPXAUTH". Notice the first character is a period? Is there a particular reason for this? Like, does this have an impact on domain names or subdomains for the target domain.
Or is it purely some random thing an MS dev person came up with (maybe to help out the ordering of the cookies, when they were debugging or something .. as text with periods prolly get listed before other strings)?
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;
View 1 Repliesiam 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
View 4 RepliesI 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.
i am trying to open a pdf stream in browser but can't acomplish that.
i am using ICallBackEventHandler and when i get the data from the client side i call my function to open stream but this dose not work.
However when i try to do that without ICallBack this works(so the ICallBack is the problem)
this is my code in cs
public
partial
class
Default4 : System.Web.UI.Page,ICallbackEventHandler
{
{
[Code]....
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.
View 6 RepliesI am building an MVC application with C# as my language which is hosted on Widows 7 IIS. A call to Add a new member to the database works, but when attempting to save the change I get the following error:
Cannot open user default database. Login failed.
Login failed for user 'IIS APPPOOLmyApplication'
The SQL table was added just by adding it within VS.
My page (which basically contains a pair of Repeaters) renders and is displayed to the user.I'd like to have a "Download" button on the page which, when clicked, will propmt the user to save the page locally as an html file without losing any of the CSS formatting.
My CSS files are linked to via a Master Page.Currently, I have the button linked to some javascript that open will the Save As dialog, but all of the CSS formatting is lost, and it saves the page .I'm assuming that the button will need to open a new page which will re-create the data for the Repeaters and then save using StreamWriter, but I'm not exactly sure if that's right or how best to do it.
can we save pdf document without save,view,cancel dialogue box in asp.net..
View 1 Repliesi want to create an image from a input stream. My input stream is coming in a string that is i am getting stream data something like this
string stream=Request["data"];
and in stream i am getting co-ordinate values like
102_85_92_88-92_88_85_94-85_94_79_100-79_100_75_110-75_110_75_119-75_119_75_125-75_125_82_136-82_136_88_141-88_141_92_145-
now i want to draw an image from this data and want to upload it on my server. I am not able to do this.
I'm getting an xml stream from one website.and i need to bind my grid with that xml value.
View 5 RepliesI 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?
How to save video file in sql . and play on web page in asp.net c#.
View 1 Repliesi have place some .txt files in my web application root directory. now i want to open a popup on button click with save button so that client can save this file on his/her PC. also can we auto set the path??? mean client jst press save button and file automatically stored his "D:\Foldersample.txt".
View 1 RepliesI'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)............................
I have a MS Chart Control and I'm trying to serialize the chart to view state. When teh page postbacks, I wnat to de-serialize the chart from ViewState, then load it back to the Chart's serializer. When the Chart1.Serializer.Load is called, I get an error message stating Data at the root level is invalid, line 1 position 1.
So here's what I have:
Chart1.Serializer.Format = System.Web.UI.DataVisualization.Charting.SerializationFormat.Binary;
Chart1.Serializer.Content = System.Web.UI.DataVisualization.Charting.SerializationContents.All;
Chart1.Serializer.Save(myStream);
ViewState["myStream"] = myStream.ToArray();
On postback, when the routine is called:
System.Byte [] byters;
System.IO.MemoryStream myStream = new System.IO.MemoryStream();
if (ViewState["myStream"] != null)
{
byters = (System.Byte[])ViewState["myStream"];
myStream.Write(byters,0,byters.Length);
myStream.Position = 0;
Chart1.Serializer.Load(myStream); // this line throws a XmlException - data at the root level is invalid. line 1 , position 1.
}
The length of the stream was 15,518 and capacity was 16,384 when it made the save. On postback, both capacity and length became 15,518.
can we save or update record in the table from the same page ?
View 2 Replies