DeviceIOControl Function - Read The Table Of Contents From A CD
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.
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Feb 23, 2010
How do I copy a table to another table without overwriting the contents of the second table?
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Jan 17, 2010
I have several other API calls working fine, and I've built a Disk_Get_Drive_Layout call with several supporting Structures (really, a lot) If the actual code ends up being really necessary, I'd rather post it then than spam my question with all of it. The bit I know I don't fully understand is in the DRIVE_LAYOUT_INFORMATION_EX Structure (and also the PARTITION_INFORMATION_EX Structure) where a C++ union() is called for - I built a separate structure to provide that functionality, but it does the exact same thing as everything else. The union() in C++ sets up a class with multiple members, where only 1 of those members is understood to exist at a time.
Past that, there's also an uninitialized array in one of the structures and I'm not sure exactly how to handle that - my assumption would be that the API initializes and populates it, and when I try to initialize it myself with an explicit original boundary it always throws a system error at runtime (there's no exception with the uninitialized array, but it never returns any data either and both err.GetLastDLLError and the API GetLastError function always return code 122 defined as 'Error_Insufficient_Buffer')
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Mar 3, 2010
I am trying to get the HDD Disk Drive information from the DeviceIOControl function with IOCTL_DISK_GET_DRIVE_LAYOUT_EX control code.
Here are the problems :1. The DeviceIOControl function returns(as from output buffer) DRIVE_LAYOUT_INFORMATION_EX structure. Which contains some data types i am unable to get.
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Nov 25, 2010
How do I use DeviceIoControl Win32 API and the IOCTL in VB oder C#/C+/C++ to power down a USB port?
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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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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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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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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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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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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 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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Jan 12, 2012
How do I check if a table has contents? Honestly I still don't have any initial codes for it. Do I code it in VB or just use a query?
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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 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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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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Feb 2, 2011
I've been using in the last weeks in this computer are VS2010 with a little Excel, GIMP and Chrome, Why all of a sudden many folder of my computer have a file called "OneNote Table Of Contents.onetoc2"?I checked and, yes, I have OneNote installed here, but I never used it, I didn't even know I had it.I searched around, and I only found articles talking about OneNotes configuration, but I never used it, so... did something that I did with Excel or Visual Studio told OneNotes to start creating those files?
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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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Aug 25, 2010
I have a page where I would like to collect information about x number of users.I have a control where you enter in the number of users and based off of that number, I create a dynamic table with a row for each user.Each table row has textbox controls that I would like to retrieve the value from on postback.How can this be accomplished?
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Jun 10, 2011
I am trying to print the contents of a cell in a table. I am using ITestDataTable to get the contents of the cell. How to print the contents of the cell?When I use Msgbox, I am getting an error :I am using the below code for getting data from the html table:
Dim ordertable As Vp.ITestDataTable
ordertable = Table_HtmlTable_0.GetTestData("contents")
Dim i As Integer
Dim j As Integer
[code]....
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Mar 2, 2009
I'm trying to write a Function that retrieves the number of rows within a particular table on a HTML page. The table doesn't appear to have a name rather has been allocated a class called "messagelist"What I'm trying to do is have the code that will read my email messages in my web mail account andreport to me when its finished. I'm able to log on and access my inbox but are struggling from here on in.
<tr class="control"><td colspan="6"><form method="post" name="messages" action="/horde/imp/mailbox.php?nocache=asdash635"><table class="messageList" cellspacing="1"><tr class="item">I CANT SEEM TO FIND A TABLE NAME --Can I use table class?All the ROWS are coded...<tr id="row42290" class="unseen"> <td> <input id="check42290" type="checkbox" class="checkbox" name="indices[]"
[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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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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Sep 29, 2011
I am facing an issue with the Hyperlink styles under Table of contents in a word Document.Here,I want to Change the Styles For Each Hyperlink for different Heading Levels under a table of Contents.But i am unable to change the styles.It is showing the default styles(Blue color,default Size etc) for hyperlinks.
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Apr 7, 2011
i am trying to create a vb application which creates pdf documents by taking xmls as input.I want to get the table of contents for the pdf being created in the following format
heading1 ----------------page number
heading2---------------page number
heading3-----------------page number
using the chapters and section functions of itextsharp , all i can get is
heading1
heading2
heading3
getting the page numbers beside the appropriate entry..!??
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May 8, 2008
I am working on a 1-page report, that basically consists to select 1 record from table and bind values to proper fields (eg. =Fields!name.Value).However, I have one field in the table that will be just "Y" or "N".When this field will be "Y" I would like to show in the report "Yes, I do."; otherwise I would like to show "No, I dont."
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