In a VB.Net project I use the Adobe PDF Reader (AxAcriPDFLib) control to display a preview of a selected PDF document whereafter the user can double-click upon the selected listbox item to enjoy a full screen view of the relevant PDF document. see the attached sample in this regard. Is there any way to emulate this in ASP.Net?
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Our ASP.NET application allows the users to review any number of PDF forms. A simple listbox holds filenames and the forms are displayed inside a standard iFrame. The setup is simple and effective: when the user clicks on a filename, that filename is loaded into the iFrame, and shown to the user.
Users are allowed to digitally sign the forms. For appearance purposes, a bitmap of the user' signature is generated and placed in the appropriate location of the PDF form.
The bitmap file format is GIF, and the background is transparent.
We use iTextSharp for form-filling, and we also use iTextSharp to place the bitmap on the forms. Nothing special.
We can readily verify that the signature bitmap is correctly placed on the form, and that the bitmap itself is definitely transparent.
Problem 1:
After placing the bitmap of the user' signature on the form, the form is reloaded and displayed to the user (for verification) and, in most cases, the forms do not display the bitmap. Opening the PDF reveal that the bitmap has been placed and is definitely visible in Adobe Reader (9 and 10 - these are the versions available for testing).
Experimentation and quite a bit of research seems to suggest that the problem lies in caching. One of the possible solution/suggestion is to append a time-stamp or a GUID to the URL, when loading the form after applying the bitmap. In theory, this should prevent Adobe Reader from using a cached copy of the PDF form.
We have tried appending a time-stamp and/or a GUID, without any success: the forms still display without the bitmap. At the risk of repeating myself: the PDF form is correctly signed, and the bitmap is correctly placed. It is just not visible.
This problem seems common to users running the application on intranet web servers (IIS 7). The one application instance running on public web server (IIS 7) does not seem affected by this problem.
Problem 2:
As mentioned, the GIF file generated by our application has a transparent background. In almost all cases, Adobe Reader (9 and 10) seems to understand and respect the transparency of the bitmap.
In one very peculiar case (when the application is running on a Windows 7 64 bit machine with IIS 7), when the bitmap is placed on the form, it becomes opaque (complete loss of transparency).
Again, the problem seems related to Adobe Reader, because the bitmap being applied positively sports a transparent background.
How to determine whether the Adobe Acrobat Reader has been installed or not on the client PC?
View 7 RepliesMy asp.net app used Crystal report to display as pdf file.
If I open the report in my pc (newest version, Adobe reader 9), it is ok but once I open app in web server (Adobe reader 8), it display a blank screen.
I am using the code from: [URL] ....
Everything seems to work, expect when I try to open the PDF file Adobe Reader says:
"Adobe reader could not open 'filename.pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded)."
I tried opening it in Adobe Photoshop and was not able to there either.
I am using VS 2010 and C#. I am trying to create a pdf file in web application. I am trying to convert a dataset to pdf file. The pdf file is getting generated, but when i try to open the pdf, i am getting the error as "Adobe reader could not open "sample.pdf" because it is either not a supported file type or because the file has been damaged" How to fix this?
View 4 RepliesI am wanting to display an excel 2010 document in an asp.net web application. This document uses the new slicer functionality which I want to be available to the user.I know that excel 2010 docs can be used within sharepoint by inserting a web part which uses exceservices.But can it be achieved without sharepoint? Or can it be achieved using the the excelservices API to get the document from shreapoint and then somehow get it to the browser in .net?
View 1 RepliesI have a list box that contains a collection of documents that a user has uploaded. I would like to make some sort of preview window on the page that allows the user to see the document without having to download it and open up word or reader.
View 2 RepliesHad a datareader question.
[Code].......
Return myDataReader I have a function which is retuning a datareader to various sections of my website which is then being bound to dropdown lists, gridviews, etc. Normally the last line in a function when is the data reader and connection getting closed? Is it best practive to return a data reader or a dataset/datatable (or something even better than these two)?
I have some code in my vb.net code behind that queries a database, and if there is data, outputs it from the codebehind to a datalist on my asp.net page. In addition to sending the data to the datalist on the page, I need to take the value from "mbillaty" that is returned from the sql query, and have that value be the selected value for a drop down box also on the page. I can get either the datalist to fill, or the selected value for the dropdown box to be selected depending upon which bit of code I place before the other (ARGH), but I can't get them to both work together on the page. What am I doing wrong?
[Code]....
Had two questions about the ASP.NET menu control.
1) I have a menu control which is using a SiteMapDataSource. This is bound to a .sitemap file. I have the orientation property set to horizontal, but for some strange reason it still displays vertical. I can't for the life of me figure out why it's doing this. Am I doing something wrong here?
2) Is there a way to not display the root (Home) directory on my menu control? I only want to show Customer Support, Technician Support, Administration, and Site Map on the control.
[code]....
how to preview a filled web form before submitting finally to database?
View 4 Repliesi used a file upload control to upload file..after uploading i want to preview image without storing its path or storing in DB or solution explorrer folder.when i upload using fileupload control..path of image comes in fileupload control now i used a button so,that on button click image should be displayed in image control..
View 1 RepliesHow to display image in Image control after upload on the server asp.net C#Without pressing any key OR UPLOAD BUTTON
View 1 Replieshow to display multiple image after brows them without press upload button.
View 1 RepliesOne button I always had on the 'HTML Source Editing' toolbar was Format Document, as found in the Edit menu, however in VS2010 it isn't visible. If I go to add it, it doesn't exist in the options.The toolbar currently holds Format Selection, Decrease Indent, Increase Indent, Comment, Uncomment, Schema and accessibility.I bring up the Customize dialogue box (Add or Remove Buttons/Customize), then in the Commands tab I click Add Command... In the Add Command dialogue box, I choose Edit from the categories list on the right and yet in the commands list, Format Document isn't there anymore as it was in VS2008.Yes I could just use the Edit menu command, or even the keyboard shortcut, but that's too long-winded and the toolbar button is now sorely missed.Has this been somewhat arbitrarily removed from VS 2010 or is it hidden elsewhere?
View 4 RepliesI am using html editor from ajax control tool kit. When i get the content its giving me an html content withe all the formatting tags is it possible to get the preview content from this control.
View 1 RepliesFor years now, I always added the "Format Document" icon to my HTML Editing toolbar. It always was difficult to find this in VS2008 and VS2005. It seem it has been completely eliminated in VS2010.Does anyone have any idea where is might be in the Customize toolbar myriad of commands?I realize it is available under the Edit drop down menu as well as keyboard command Ctrl K, Ctrl D. But is is just so much more helpful to put it on the toolbar.
View 4 RepliesI am Getting strugle to get image preview after browsing image.please give me hand to get out from this problem.how to get image preview it may be through c#.net or javascript please give me code for this.i got very less examples from google but they are not worked.Please give me the CODE or sample project. and they should work in all browsers.
View 3 RepliesI have question regarding printer option page which pop up when i click on print button on crystalreportviewer and when i click okay on that pop up page it displays print preview of the report.
Is there any way to skip that pop up window(Printer Option) and just display (PDF)print preview screen instead?
(I am not exporting report to pdf, just want to display printview screen and when the user click on print button it will print out the page)
I have tried following code but i am getting error:
"Object reference not set to an instance of an object."
[code]....
how can i add a sticky notes in my asp.net webpages.... i have a requirement where i need to display the PDF document in my webpage ... and i need to add the sticky notes to that pdf document... can any one guide me .... about how to start to achieve this....
View 5 RepliesI am doing asp.net project using C#.I want to display the contents that are being typed in HtmlEditor control onto a A4 size as preview and i also want to save this content to a file(.doc or .txt).
How do i do it??
this is my compelete code for validation type and display image with AsyncFileUplaodI'd like to upload only png, jpg, gifI can upload Image and have its preview successfullyand when try to upload another type It prevents and fortunately I can see this message"Upload a valid file with extension png, jpg, gif."but UnfortunatelyIt shows a message box with this errotUnhandled Exception: this._innerTB is null what's my mistake?
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Validation in AsyncFileUpload Example</title>
[code].....
How to display document(xls,doc,pdf) dirctely on the web page. send the related links also..
View 5 RepliesI have a file up-loader by which i upload the .doc file in a folder on server.]
I want to display the whole word document content on a label as it is in .doc file in C#.
