I am getting this unhandled IOException when using itextsharp
Rebuild failed: Error reading string at file pointer 3; Original message: xref subsection not found at file pointer 118
The line of code throwing this error is: Dim inputDoc As New iTextSharp.text.pdf.PdfReader(inputPath)
Imports System.IO Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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I am building a chat client/server. And I can connect and chat just fine, but when a user disconnects, the server does not recognize this and acts weird, often spamming the last message that was sent by the user..Also, it's like the client does not disconnect from the server even when I close the client app. Once I exit the program, VB acts like it is still debugging. Once the server is shut down however, I get this error:
IOException was unhandled:Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
serverStream.Read(inStream, 0, buffSize)I don't know how to make my client and server accept the fact that a client has disconnected...
An unhandled exception of type 'System.IO.IOException' occurred in mscorlib.dll Additional information: The process cannot access the file "c:Fax524b2cfa00.tif" because it is being used by another process.
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i am making an application that grabs an image from a folder, sets it to a picture box, then has the option to delete the folder... when i click the delete folder button i get the error:
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I'm a learning VB.NET programmer that just ran in to some trouble. I'm creating a TCPClient/Server chat room application. When a client connect to the server, the server creates an object that represents the client and stores the reference to this object in an ArrayList. This "IndividualClient" object begins listening for messages, just strings, from the actual client program using a new thread that runs NetworkStream.Read. Now, when the client program is closed, the server-side IndividualClient object is supposed to throw an IOException at the NetworkStream.Read method, but this exception is never thrown, and I'm not able to catch it and handle the disconnecting of the client. With the client not disconnecting and never being removed from the ArrayList, all kinds of problems start to arise when the server tries to send a message to all connected clients.[code]
View 4 RepliesDoes anyone know a link to a list of IOException codes or some way of catching a specific error?I have been digging for a couple hours trying to find a code, or a number to catch when my app throws
System.IO.IOException was unhandled
Message="The file exists. "
Source="mscorlib"
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I am developing an application that reads from a network shared folder on a separate Windows Server. When the application attempts to read, I am receiving the error message "System.IO.IOException: The Device Is Not Ready". I have tried running the application as an Administrator, however I still receive the same error.The files in question do not appear to be in use by any other application.
View 4 RepliesI have been creating multiple background threads to parse xml files and recreate new xml files. Now the problem I am having is that even though I use synclock on global variables, I will still at times get errors and I am sure that this is just the crude way of coding I am doing, but I was wondering if someone had a better option. [code]I have global variables through out the app and should I be locking each one and does this not make using threads then useless.
View 2 RepliesI have some code which writes the variables out to a debugging text file.
Try
Dim LogFileName As String
LogFileName = "log.txt"
objWriter = File.AppendText(DesktopPath & LogFileName)
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However when I run the code I get a IOException "C:Users***Desktoplog.txt" is in use by another process. the log is not open in notepad or any other program so what other process is using that file?
In the following Sub I'm sending an Attachment when the email has been sent I would like to delete the attachment but I get an system.IO.IOException Error. the file I'm trying to delete is being used by another process. How can I detect if the process has finished.
CODE:
In the following Sub I'm sending an Attachment when the email has been sent I would like to delete the attachment but I get an system.IO.IOException Error. the file I'm trying to delete is being used by another process. How can I detect if the process has finished.
Private Sub SendMail()
Try
Dim cfiAttach As Net.Mail.Attachment
Dim Attacmentfile As String = AttDir & fileName & ".pdf"
Dim SmtpServer As New SmtpClient()
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Determining the max filename & path size of the OS.zip I whipped up a quick app to test the max filename & path length for a chosen folder. It works gr8 except when I choose the root of the C-drive. When I do, I get this error:
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I keep getting an IOException, because the file is apparently already in use. I'm pretty sure I closed every handle, and I don't know what to do.
High-Score
If haswon Then
Dim strFormat As New StringFormat()
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I am receiving "A device attached to the system is not functioning" IOException in_serialPort.Open() in a Windows 7 PC (64 bits). The vb.net application is working ok in 32 bits and is compiled x86. In the device manager, the driver appears ok under Ports (COM & LPT) -it's a USB, CDC or virtual comm port.This exception occurs mostly all the time, but ocasionaly, few times, _serialPort.Open() has worked and the communication between the application and the hardware has been stablished. If the Pc is restarted and connected to the same port where the driver
View 4 RepliesI get the following error message when i try to copy a directory using folder dialogue to get the path, into a predestined path. The code is as follows:
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I have a relatively simple VB.NET app. It targets framework 2.0 from Visual Studio 2010. The app works fine most of the time, except that the users sometimes receive the
following exceptions. The error is completely random and somewhat rare. I haven't been able to trap it while in a development environment. It also doesn't appear to be
pointing at my code. My app continues to run if the users ignore the error. How would I trap and handle this error?
I'm writing a short app that will send an email notification, rename files and move them to a history folder after a DTS package runs and creates the files. It's a simple setup, the files will be in a folder. I'm attempting to rename them, then move them. For some reason, I keep getting System.IO.IOExceptions when I try to rename the files. Here's my code:
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Brief of my project: Taking attendance using RFID reader and RFID passive tag. Main tasks:
1) Scan a Tag and Tag ID is transmitted to GUI.
2) Tag ID is matched with Student ID in database.
3) Successfully matched Student ID is displayed on GUI and LCD.
When i had experienced this problem, student ID was only display on UI but not LCD. After that, my system hang. This happened only when the data of tag scanned is taken from text file through OpenFileDialog. Manually add of data via UI just work fine.
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Is it possible to add a password protected pdf using itextsharp?
View 2 RepliesI have a bunch of PDFs that I'm just trying to open, resize the page, and then save. I'm also hoping that the file sizes will shrink significantly doing so. I am using iTextSharp and the resizing works just fine, but the file size is nearly identical, ever so slightly larger in fact. Here's the function I have now:
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Is there a way to extract the value for APPEARANCE_NORMAL from each stamp in a PDF using iTextSharp? I know how to find all the Stamp annotations, but I am unsure how to get APPEARANCE_NORMAL.
View 6 Repliesin my document i am creating 3-4 pdfptables. at design time i dont know the size of the tables. i need to place the 2nd table right after the first, but i dont know the position of the first (i cant calculate it because i dont know how big it is). how do i know where to place the second table?
View 2 RepliesI have an instance where I have a logo image as part of some artwork..If a user uploads a new logo I have a form field which is larger than the default logo.I then use that form field to position the new image.
The problem is I need to set the background colour of that form field to white so that it covers the old logo in the event that the new image is smaller than the old logo..
what I have done is:foreach (var imageField in imageReplacements)
{
fields.SetFieldProperty(imageField.Key, "bgcolor", iTextSharp.text.Color.WHITE, null);
fields.RegenerateField(imageField.Key);
PdfContentByte overContent = stamper.GetOverContent(imageField.Value.PageNumber);
float[] logoArea = fields.GetFieldPositions(imageField.Key);
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The problem with this is that the background colour of the field is set to white and the image then doesn't appear.. i remove the SetFieldProperty and RegenerateField commands and the image replacement works fine.is there a way to set a stacking order on layers?
why my tables are lapping over each other?
Dim datatable As PdfPTable = New PdfPTable(4)
Dim page As Rectangle = document.PageSize
datatable.TotalWidth = page.Width - document.LeftMargin - document.RightMargin
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even though im decrementing last_pos by the height of the previous table, they still lap over in a weird way like this:
for this line: c.WidthPercentage = 100F
i am getting this error:Error 1'WidthPercentage' is not a member of 'iTextSharp.text.Table'.
here's the entire code. it's taken directly from the tutorial
Imports System
Imports System.Drawing
Imports System.IO
Imports iTextSharp.text
Imports iTextSharp.text.pdf
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I need to convert fdf files to pdf in asp.net using vb. I found some code that I'm trying to learn from. What I would like to do is upload the fdf file and then output a pdf to a directory and email it out. The fdf files are coming from a shared linux/php host (using the php fdf functions is all I can do here on this host) that are emailed to a central inbox. I'm going to pick up the files from the inbox and upload them to a win/asp.net box to convert to pdf.The code i found is below.
* Dim pdfFlat As New MemoryStream() * Dim pdfReader As New PdfReader(context.Request.MapPath(pdfFormFileName)) * Dim pdfStamper As New PdfStamper(pdfReader, pdfFlat) * ' bind fields from fdf... * Dim fdfReader As New FdfReader(context.Request.InputStream) * Dim pdfForm As AcroFields = pdfStamper.AcroFields *
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I want to display the data in the 2 column of PDF using iTextsharp. Like this way e.g.
Q.1 aaaaaa Q.5 eeeeeeeeeee
Q.2 bbbbbb Q.6 fffffffffff
Q.3 cccccc Q.7 ggggggggggg
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I can done it by using count but it's not working if the question length is min/max . how i can done it manually.
Does anybody know how to create a pdf from a web page using iTextSharp? I've already added the reference to my program, but i'm not clear on how to create a pdf from a web page.
View 1 RepliesI have created a simple table and i need to position. does anyone have experience with tables in itextsharp? [code] the first table works but the second does not
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