C# - How To Read PDF File Contents From Top To Bottom
Nov 17, 2009
I want to read a PDF file having lots of text, images, tables in it. I want to read the entire file content by content page by page, from top to bottom.
For example:
The top of the page contains the Heading
Then on left hand side the contents and on the right hand side images
So I first want to get the heading then the contents then the images. Is there any Open Source for reading the PDF or any coding reference for .net 2.0 or greater version.
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May 21, 2009
in my text file i have two part. Called bottom and top. So i need to read the Top part first then and match the line with bottom part. Its like this
[Code]...
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Dec 23, 2009
I have this Quiz software that lets you create online multiple choice quizzes which are great for studying (I am in grad school and I'm trying to use everything I can to learn). So the Quiz software is great but it only lets you input questions by hand, one by one. I took a look at the .xml file that the quiz program spits out and came up with the idea to try and make a converter so that I can import many questions at once. I was hoping to try and solve this limitation by doing the following:
Take a .doc that say a tutor gives us with a bunch of practice questions, and then take that into Crimson Editor, and then format it so the question is on line 1, the multiple choice answers are on lines 3,4,5, and 6, (for the next question, the question would be on line 11, and the answers on lines 13, 14, 15, and 16, and so on) and then take that saved .txt file into my program, hit the generate button, and it will spit out the .xml file, and then import that into the quiz software to generate the online quiz.
Here is an attached screenshot of my program layout so far:
I figured out how to open a text file by watching simple youtube tutorials, but I don't know how to have it generate the stuff and have it show up in the bottom text box. I know how to do the coding to convert the txt to proper xml code but I don't know how to be able to save the contents of the bottom text window to an xml file.
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Apr 25, 2010
I have an XML file created using VB 2008 and I want to read the entire contents of the XML file into a text box.
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Oct 16, 2011
Is there any way I can read the contents of PDF file in Visual Basic 2010 ?Is there any ActiveX Control available for this purpose?
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Jul 18, 2010
I'm trying to read the contents of a text file. Everyone says it's a piece of cake, but I still get error "404 Not Found" even though the site exists.
I'm using the following:
Dim myRequest As HttpWebRequest
Dim myResponse As HttpWebResponse
myRequest = HttpWebRequest.Create("[URL]") 'This does work
myRequest = HttpWebRequest.Create("[URL]") 'This does not
myRequest.Proxy = New WebProxy("http://proxy address", True)
myRequest.Method = "GET"
myResponse = DirectCast(myRequest.GetResponse(), HttpWebResponse)
When I hit the [URL] the myRequest.GetResponse command passes the contents of the site into myResponse. However, hitting the [URL] always returns 404 even though it exists.
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May 25, 2010
I have developed a vb.net dll (.net 3.5) which does the following :
- I have data of several stock market companies.
- They are stored in several folders under a main folder.
- These files are random access files.
- There can be around 4000 files in total for example.
I wrote a program which reads a current csv file and stores contents in array. Then I store name and path of companies in folders (which I was talking about). Then I match one company from csv (stored in array) to companies in user's folder (again reading from array). If found I insert data in the file (random access file). This whole process takes for eg. 2 min my system. A similar program was written years ago by someone in powerbasic which takes slight less time if run one but if run for multiple csv files it takes only a few seconds doing the same thing for other files. When I do the same thing (by writing code to .net dll) and making a dummy app to run it, no matter how many times I run it takes same time. And is way slower than the earlier one (PB) one I was talking about. But if I paste the same code in my win (.net) app and not use .net dll then it runs a bit faster.
I need to show status so if I pass my form's label reference to .net dll and it updates it does that slow down process a lot. As I mentioned I am trying to process the files and it takes longer in .net. What should I do to get best performance? Unfortunately due to unexplainable reasons I cannot change the format or use a db. The files which I am reading/writing (random access files) are use by other products so I have to stick to that format. What I am doing is storing the location of those files in array so that I don't have to search folder again. that is not taking time. But opening reading and writing files is time consuming if I am doing it for few thousand of them. A similar program in powerbasic (developed years ago) runs fast. Running code thru .net dll is slower than running it thru program. Why?
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May 21, 2009
I'm wondering whether anyone else has had to do this. I've looked in to some third party solutions.
The two I've used with the most success are: 1. xPDF. This includes an executable, PDF2TEXT.exe, which takes an argument that is the path to the PDF file to "read" and a second argument which is the name of the text file where it will write the output. This works well and fairly quickly, but it's external to my application and calling it via a Process.Start() command raises security considerations and requires to user to allow the external executable to run. They must allow this to happen AT LEAST every time they run the import application (IF they will check the "Don't keep bothering me about this" box).
2. A solution from Foxit, which is GREAT, but costs a good bit of money to use. Does anyone have a solution that I can implement IN MY CODE (like #2) but that's free (like #1)?
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Oct 9, 2011
I am totally embarrassed at having to ask this question, but I'm having trouble with file IO.I want to write a line to a text file. On another form, I want to read the contents of the text file one line at a time, so I can make comparisons of it's contents.
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Feb 19, 2012
I am unable to read from the text file in VB. I want to read the contents for text file and store them in array. See my code below and the text file. How should I read this text file.
'Purpose : This program will read student name & final marks for a set of students from the text file and then calculate & display class average, class standard deviation, number of students above class average, name of student with highest mark, number of students with A's(90-100), B's (80 < 90), C's (65 < 80), D's (50 - < 65) and F's (<50).Calculate for standard deviation of a set of numbers:Step1. :Find the average Step2. : Square the difference between each number and the average
[Code]...
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Mar 5, 2009
I need my program to 'take a peek' into a ZIP file and see if it contains a certain file. I need it to do this many times for a large number of files, so I would prefer it without having to unzip the entire zip-file each time, as that would take far too much time (it's a fairly large zip-file of about 250 MB).Also, I don't need the actual file at all. All I need to know is if it exists inside the zip file.
vb.net
If IO.File.Exists("C:FolderIPFile.zipfolder_in_zipfile.jpg") Then
' "file.jpg" exists inside zip-file!
[code].....
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Dec 22, 2011
So I managed to sync up the filesavedialog to save the contents of my textboxes to a file in a location, but how do i use the fileopendialog to read the contents from that saved file back into my textboxes?
Private Sub SaveFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles SaveFileDialog1.FileOk
Dim FileToSaveAs As String = SaveFileDialog1.FileName
[Code]....
that's my save dialog. i want to bring up the saved text from textbox1 back into the textbox on my application using the fileopendialog.
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May 20, 2009
the default readline method of streamreader reads the text file from top to bottom how i can reverse it?from bottom to top?
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Mar 16, 2009
1) On one of my forms i have a richtextbox but whenever the programs ads something like richtextbox1.text = richtextbox1.text & "New Entry" The box goes back up to the top and you need to re-scroll down to the bottum. Is there anyway i can have it to always go to the bottum when something is changed instead of reverting back to the top. Because things are added almost every 1-2seconds until it gets to the point where you cant scroll down to read what was said before something new is added and it jumps back to the top.
If you dont know what i mean make a timer of 1 second that ads somethign to the textbox and youll see what im talking about.
2)Or better still is there anyway to get the program to recive new lines from the textbox. Basicly I have a textfile which is read by around 4-8 clients. I want each client to know what its read so it can process the textfile but i dont want it to say add something like ' to the start of every line its read and ignore all ' lines because then the other client will ignore it to. So what im looking for is a sub that will process the textfile and put any previous unread lines (previous unread lines that session [i.e since program restarted]) into a string array like newline(1)
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Jun 14, 2011
Does anyone know how to read a single column array from bottom up, then back down, filled with decimal data, into one line seperated by comma's?
a = 0
Do Until a > decArray.Length - 1
test = decArray(a)
[code]....
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Jun 17, 2010
I am writing a simple program that will encrypt the text that is held in a text box and save it to a text file but I want it to be able to open a text file and decrypt the contents.
Ok now all the threads I have read are about reading a text file that is in a preset location.
What I want to do is open a text file that the user selects and have the contents displayed in a text box.
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May 9, 2012
I have a pretty weird one here, would it be possible to read a column of a text file in to a combobox and to display the directory after the contents of the combobox?[code]...
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Mar 29, 2010
Im working with .ISO and .Bin files, and 7z, winrar and winzip are all able to open a .ISO or .Bin like there a zip file and you can see the contents like so:
7z
UltraISO
What im trying to do is detect the SLUS_215.57 file name, to then pass on to my if statements, like so:
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim selit As String = CStr(ListBox2.SelectedValue)
[Code]....
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May 15, 2009
I'm trying to place the contents of a text file (just a list of names) into a list box when the form loads.
My code currently looks like this:
Imports System.IO
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
I can get the names into the list box, but they're all on one line. I thought about using a For...Next loop to read the contents of the text file, but I got into all sorts of trouble; do I need an array with that method? So I've got back to the code I originally had.
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May 24, 2009
I have a form with 2 listboxes. I've added items in each listbox. I save all the items from each listbox to a text file. What I want to do is open the text file and I want each string inside the text file to go to the appropriate listbox. How can I make my program recognize where each string belongs?
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May 16, 2008
Would I be able to for example, write the contents of Textbox1 (say it's labeled First Name) and Textbox2 (Last Name) and make it write to a database. The on the next screen, form, window, whatever....have it say Hello (First and Last name that was put in on the previous screen).
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Aug 25, 2011
I'm trying to read the table of contents from a CD and am having problems with the DeviceIOControl function. When I call it with a control code of IOCTL_CDROM_EJECT_MEDIA or IOCTL_CDROM_LOAD_MEDIA it works fine, and opens or closes the CD drawer. But when I call it with a code of IOCTL_CDROM_READ_TOC_EX it gives an error code of 6 (ERROR_INVALID_HANDLE). I'm using the same handle, so I can't see why it's complaining. It's possible that the input data that I'm giving it is wrong, but I don't think that it should give this particular error in that case.
[Code]
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Feb 3, 2009
We all know how to parse txt file from top to bottom. how do it in a reverse way?
While sr.Peek > -1
input = sr.ReadLine().Trim()
LineNumber += 1
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Oct 10, 2010
how I can read a word document to pass its contents into a variable. Is there an easy way to do this?
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Apr 19, 2010
In windows explorer on Windows 7 (and Vista I believe), when you click on a file the bottom pane shows the files metadata. What I am particularly interested is the files Tag. If you click into the tag field, Windows will give you a list of tags. The list appears to be random and incomplete. So I have two questions. Is there a way to retrieve a list of a file tags on the system and is there a way to add to the list of tags in the Windows file pane?
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Mar 11, 2010
I have a txt file that I need to read into a listview, but I need to read from a specific line in that file. Below is a sample of the txt file to read,
6400,3200,2,95.5,84,76.6,0
1,2,-20,15,0,0,0,"NO",0,0
TOTAL GPM= 6400 HWT= 95.5 CWT= 84.0 IWBT= 76.6 ALTITUDE= 0
CODE]...
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Mar 22, 2009
What i am trying to do is open a save file dialog and write to a .txt firl the contents of my listview. so far:
[Code]...
i have this, but i'm not to sure how to write to the .txt file i know i need to use a for each to loop the contents of the list view
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Apr 15, 2012
I have a Motor Class, along with a Collection to hold objects address. Each Collection object holds the Class fields as a String to display in list box. I am able to write the collection string to the file and save the string. But unable to open the existing file, read the file back into the collection object.
Public Class Motor
Private strId As String
Private strDescription As String
[Code]......
I have looked all over for anything (samples or tutorials for working with files and collection objects) pertaining to type of operation with out any success.
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Oct 24, 2009
I have created a program that saves the co-ordinates of the users mouse and saves it to a text file to be used as an auto clicker.
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Dec 15, 2009
I'm using vb.net 1.1 to develop the program. I got text files that contain test result from a machine, like below.
T1 1.24535 2.56335 2.43253 1.24538 2.55619 4.35243
T2 1.42542 1.63728 3.57295 4.59275 1.57320 2.72057
T3 5.12857 2.45375 6.38593 2.58375 3.57259 3.57204
I need to check the test result with the data from database, to find out which test result is failed. If there is a fail test result, I will show an alert to the operator and stop the checking process. Until the operator close the alert, then the checking process will continue from the last read point.
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