I am looking for code that linearize PDFs file. that show page-by-page into the user's browser, so the user doesn't have to wait for the whole document to download before starting to view it.
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I've been asked to implement a security requirement that we instruct browsers not to cache sensitive data. This is all fine for the ASPX content using the standard instructions:
Response.Expires = -1;
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetNoStore();
However when I set these headers for PDF downloads, IE8 won't show the PDF (haven't tried other IE versions yet, kinda moot, I need it working on all of them, even IEfreaking6). Seems to work in firefox 4 beta, but I haven't double checked that it's definitely not caching it. Here is the abridged version of the code I'm using to serve the PDFs:
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.Buffer = true;
//This stops the PDFs from being viewed :(
//Response.Expires = -1;
//Response.Cache.SetCacheability(HttpCacheability.NoCache);
//Response.Cache.SetNoStore();
Response.ContentType = mime;
Response.AddHeader("Content-Disposition", disposition);
Response.BinaryWrite(file);
Response.End();
Where in the case of PDFs the mime type is set to: private const string mimeTypePDF = "application/pdf"; The disposition is set to: var disposition = String.Format("{0};filename="{1}"", SendInline ? "inline" : "attachment", Path.GetFileName(filename));
I'm going to play-around a bit more, maybe forcing them to download as mimetype "application/octet-stream" might work, but that would stop the nice open PDF's in a new browser window from working. Has anyone had any success with preventing IE from caching PDFs from the server side and successfully displaying them?
Just to give a clear example about what happens. In one scenario user's can select a bunch of reports from a list, these are compiled into a PDF and the PDF is shown in a new browser window. With the caching enabled the browser window opens, but remains resolutely blank.
I am currently working on a project where I need to secure access to downloadable files. The solution I want to implement is to have two buttons next to each document. One that says Editable and the other read-only (depending on the users permission they will see one of these or both). The editable will work normally with the browser dialogue opening to say open / save the document. That is the easy part. The read-only button needs to open the document without caching anything (in temporary internet files) on the client's machine for security reasons or give the ability to save it to their local machine.
The best Idea I have for this is to convert the document to HTML on the fly and then redirect the user to this page. We can then turn caching off on the site so the HTML isn't cached (I know they can then right-click and save the HTML or copy the text,etc.. but that is deemed acceptable). Does anyone have an alternative solution than this (or have an easy way this can be achieved)? I don't want to install Office on the web server or pay heavily for a third-party tool like Aspose.
I am creating a web app to basically allow the user to select multiple files, specifically pdfs that have already been created on a network path, and print whichever ones they want. Can someone point me to the best way to accomplish this? I have done a lot of searching, with no good results so far.
View 3 RepliesI have this HttpHandler which works great ONLY for PDF files:
=================================================================
public void ProcessRequest(HttpContext context)
{
HttpResponse response = HttpContext.Current.Response;
[code]...
I have multiple PDFs coming from a report generator and I want to merge them to a single document. The merging process must run in a web site or WCF web service environment (Framework 4.0, IIS 7.5). Is there a component, open source or commercial, to accomplish this?In my process I get the PDFs as streams. If I have the choice, I would prefer a merging method, working directly on these streams - without file representations.
View 2 RepliesI have been presented with a problem which requires me to print PDF files from a server as part of an ASP.NET web service.
The problem is further complicated by the fact that the PDF files I have to print can ONLY be printed using Adobe Reader (they were created using Adobe LiveCycle and have some strange protection in them).
This piece of code seems to do the trick in the Visual Studio development web server, but doesn't do anything when the site's running in IIS. I'm assuming this is probably some sort of permissions issue!?
Dim starter As ProcessStartInfo
Dim Prc As Process
' Pass File Path And Arguments
starter = New ProcessStartInfo("c:program files...AcroRd32.exe", "/t ""test.pdf"" ""Printer""")
starter.CreateNoWindow = True
starter.RedirectStandardOutput = True
starter.UseShellExecute = False
' Start Adobe Process
Prc = New Process()
Prc.StartInfo = starter
Prc.Start()
I am interested in learning how to set up a secure report server with which I can publish individualized reports to my constituents. I know that banks and brokerage firms can do this, but I am not sure how it is done. I want to publish documents for an academic institution (grades, bills, transcripts, etc). I know some ASP.net and I am pretty fleuent in Crystal Reports. I am considering using a product like pdf-explode to disseminate reports via email, but I would really like to learn how to set up a secure site for my constituents and have them view the reports there.
View 1 RepliesI would like ask you for some ideas how can I write mechanism that will be automatically read files from folder. I don't know how to schedule the write task. I want to check for new file everyday and if the new file is in the folder read it.
View 2 RepliesI have an asp.net panel having various controls including gridview. I have converted this panel into pdf and attached it as an email attachment using memory stream. Everything is working fine. Now I have an File upload control outside panel through which I have to attach a file and send it in mail along with the already attached panel. But I am unable to figure out how to do it.
View 1 RepliesI am downloading file from database using the following code. This code downloads an excel file from the database which has a macro attached to it when it is opened. This macro reads file name of the excel file and uses it for its computation. Everthing works file if user saves the file on his harddisk and then open if but if he directly opens the file from the dialog(by hitting 'Open' button) then file name of the opened excel file comes out be the name of the webform that has the above code and this leads to error in the macro. Is there any option through which i can control the name of the file if user directly opens the file from dialog or the option to disable or remove 'Open' button form the dialog?
[Code]....
my project is in c sharp and must upload pictures to MySql DataBasethe uploadfile controle is included in asp form that i made but the problem is that the uploadfile always get the Postedfile = null i tried to use html input file but the same problem still
@ Page Language="C#" MasterPageFile="~/MasterPageB.master" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="Add_Pictures" Title="Untitled Page" %>
<%@ MasterType TypeName="MasterPageB" %>
<%@ Register assembly="MyFormView" namespace="MyFormView" tagprefix="asp" %>
[code]...
I am using the async file upload control to upload to a image file. I want the user to upload only jpg files. And for that I am checking the uploadedfile content type in server side, after the upload complets. I wanna check this, before upload starts. There is one javascript method
function startUpload(sender, args){}
but how to access the content type of the file selected by user.
I am using HTML file control and HTML image control in .aspx page (for uploading image and showing on web page). It is working fine. But I am unable to get that uploaded image file path and file name in .aspx.cs page. And also tell me how to save selected image in MS ACCESS database.
I have to copy a file from client machine to server folder without use file upload control.
i tried with WebClient().Like this
Dim onbjweb As New WebClient()
onbjweb.UploadFile(Server.MapPath(serverpath), "POST", LocalFilePath).
Its working fine in localhost.When its deployed in server its not working.
I am using JQuery & JSON (POST) to call webmethod. However I can call only webmethod located at aspx file but not in asmx file Below are sample codes
CustomValidate.asmx
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel
Public Class CustomValidate
Inherits System.Web.Services.WebService
'ACCESS VIA JSON
<System.Web.Services.WebMethod()> _
Public Shared Function AJAX_Test(ByVal date1) As Boolean...
Return True
End Function
End Class
Javascript: JQuery JSON
function isDates(source, arguments) {
var isValidDate;
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "CustomValidate.asmx/AJAX_Test",
data: '{date1: "' + arguments.Value + '"}',
dataType: "json",
async: false,
success: function(result) {
isValidDate = result;
},
error: function(httpRequest, textStatus, errorThrown) {
alert("status=" + textStatus + ",error=" + errorThrown);
}
});
arguments.IsValid = isValidDate;
}
It always return javascript undefined error. But if I put the AJAX_Test webmethod in aspx page and replace the url: "CustomValidate.asmx/AJAX_Test" to "mypage.aspx/AJAX_Test". It works fine.
I am trying to configure my web application to send emails to my email address in case of any error . Below is my coding in the web config file, I am following example from a book cuase I AMM A nOVICE TO VISUAL STUDIO AND .NET AND C#. THE NAME OF THE BOOK IS ASP.Net E-Commerce in C#. I am not sure what to put in for the MailForm value since the book did not say could someone tell me .
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In my other configuration file under the App_Code folder I have this coding Below:
[Code]....
I have two folders in my asp.net web application in which I create new folders programmaticaly. The entire solution is under VSS source control. I was not able to manipulate these two folders programmably. For that, I gave {MACHINE}ASPNET user account full control over these two folders. Still, the "access denied to the path" error was coming. I saw that these entire folders were marked readonly. I tried to uncheck Readonly from explorer but not successfull, readonly check does not get removed. Also, if I copy files using method, the destinationn copied file becomes readonly. I have also tried File.SetAttributes (path,FileAttributes.Normal); but no success. How can I make the copied file not READONLY?
View 1 RepliesI am trying to import the SQL file provided by Elmah into my application, and I don't want to import it into the development machine I use. I want to make it a .mdf file so it can be easily transported to my host. I was wondering if there is a way to do this?
View 7 RepliesI am using asp.net 3.5 file upload control. I can browse the files when click the Browse button. Same time I can't browse the file when enter key is pressed while file upload control is in focus. I am using master page. I am in urgently need of this.I want to browse the files when enter key is pressed while upload file controll is in focus.
View 1 RepliesI have an Async File Uploader control inside a Repeater which is inside an update panel. Now,I am uploading the file into ftp,so I am not uploading the video file,using SaveAs() method. For uploading the file in ftp,I have this UploadFile method which takes these four parameter:FileName, UploadPath, FTPUser, FTPPassword.Now this FileName,I have to send the full file path. My UploadComplete event looks like this:
<pre lang="cs">protected void AsyncVideoUpload_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{//VideoPath is a session variable
VideoPath = string.Empty;
if (AsyncVideoUpload.HasFile)
{
// string filepath = AsyncVideoUpload.PostedFile.FileName;
string filepath = e.filename;//above two captures only the file name,but I want the total path,like c:/MyDocuments/...
UploadFile(filepath, "ftp://172.20.117.102","test","Value*12");
VideoPath = AsyncVideoUpload.PostedFile.FileName;
}
}</pre>
In our application, we allow user to upload documents which can be PDF, Doc, XLS, TXT. Uploaded documents will be saved on web server. We need to display link for each document user uploaded and when user click on that link, it should open relevant document. it is expected to have required software to open relevant documents.
To upload document, we use saveAs method of FileUpload control and it works absolutely fine.Now, how to view it?I believe, i need to copy/download file to local user machine and need to open it using Process.Start.For that i need to find user local temp directory. if i put path.GetTempPath(), it gives me web server directory and copy file there.
File.Copy(
sPath + dataReader["url"].ToString(),
Path.GetTempPath() + dataReader["url"].ToString(),
true);
Our website used to be a php website, now everything changed to .net, but the customer still want to keep the original php Request url. I want to know How to set Handler mapping on IIS7 to redirect .php file to .aspx file ? In more details, when you click handler mappings on IIS 7.0, what kind of hanlder should you add (add managed handler or add script map or add wild card script map or add module mapping) to redirect .php file to .aspx file?
View 1 RepliesSpent ages trying to get this right but am struggling now. I have a list box and textbox, I can happily enter Email addresses into the textbox which are saved into a text file and populated in a list box. I want to be able to select a list item and delete it, along with it's record in my text file. I was going to do it by on the delete list item / button click, it delete's the text file and then writes and a new one with the remaining list items in the list box. Unfortunately it's re-writing the file but either not including the remaining list items. Here's some examples of what I've changed and what populates the text file:
StreamWriter1.WriteLine(Addresses.Items); - System.Web.UI.WebControls.ListItemCollection
StreamWriter1.WriteLine(Addresses.Text); - A blank line?!?
The code is below. The reason I wouldn't allow the user to delete the first list item is because I thought the code was working ok but for some reason putting in a blank line to start with, and if I deleted the line it'd delete all file content. No, I don't know why I thought that either.
[Code]....
where I've gone wrong? I've not actually slept since I woke up at 8am yesterday. It's now 11am... today.
I have an application I am trying to write that generates a text file conforming to a file specification, and the file could contain thousands of lines. This part is easy. The more challenging part for me is the user interface. It needs to be a web interface with various options to affect what data gets on the file; this part is no problem. The process for generating the file, though, could take a little time depending on the amount of data , and I would think the web page would time out.
What options do I have for the UI? Could I create some sort of service that the page calls and runs in the background? When the process errors or is finished, I'm thinking there could be an email sent out, or even messages displayed on the page.
