VS 2005 Opening A Binary File
Jun 14, 2009
I've gone through about 16 hours and two packs of cigarettes trying to figure this out. First a little background. I was using 6.0 up until 2004 when I went to prison. I'm out now, and trying to relearn the trade, using VS 2005. I'm currently porting some 6.0 code from another project, SpyCast Webcam Studio, into VB 8.0. It's disheartening, to say the least. None of the old built-in subs/functions work anymore, so I have to scour the forums to relearn each and every function.The section I'm doing now takes a snapshot from the webcam (Video API --> PictureBox --> Save as Jpeg), then upens the file to upload it to the server via HTTP POST. I've been using this code in SpyCast for years with no trouble, but I spent many hours trying to piece together the right code to open the binary file to read its contents. I pieced together two methods I found around the forums, one using FileStream() though the code I found wasn't for binary files, even though it said it was, so that code doesn't really work. Method two uses Microsoft.VisualBasic.FileOpen() and works better.
By the time I run through the rest of the rigamarole of uploading the file, by the time I read it on the webserver, it's *slightly* corrupted. It's a valid Jpeg, no errors, but the picture looks like when I use to watch the Playboy Channel when I was a kid....scrambled with weird colors and whatnot.Each "chunk" is basically one "line" of the file. It looks like a single LineInput() return is the text between two carriage returns. Am I correct? I tested this with a flat text file, and it looks true. However, That one input line returns the text or data with the carriage returns *stripped*! ***?!? =( Fine, I have no problem adding my own vbCrLf to each LineInput(), if I were opening text. but this's binary. A character could be Chr(10) or Chr(13), both of which are removed from the original file contents.So I could very well need to use something other than LineInput(), but I haven't found any other examples on the web using this method. Posting the question in a forum was my last resort, because I hate...y'know, asking for help. It's a man thing, I guess.
View 5 Replies
ADVERTISEMENT
Apr 29, 2010
How would I use the BinaryWriter to append binary data to a file that is very large? Say a file that is 3GB in size. The BinaryWriter's write method will only accept an integer for the index value. I've attached a screen shot of what I'm talking about. If I were to enter a value that exceeds the size of an integer on my 32bit Windows XP system, which I believe is 2147483647 it will reject it right?
View 4 Replies
Mar 13, 2012
I need to make an E-Search engine for collage library , i can make it by using streamReader and streamWriter , but unfortunately i have to use Binary to make this project ... i've to many fields to put it on DAT file , and i've to use SPLIT to split lines and make arrays ..
what is the best way to do that ? how can i write an opened binary file on textbox and convert text to array ?
View 1 Replies
Jan 11, 2009
I have created a text editor that enables the user to create and open both txt files and rich text files.When it comes to opening files, the text files are opening fine, but when it comes to rich text they are opening like this
{
tf1adeflang1025ansiansicpg1252uc1adeff31507deff0stshfdbch31506stshfloch31506stshfhich31506stshfbi31507deflang2057deflangfe2057 hemelang2057 hemelangfe0 hemelangcs0{fonttbl{f0fbidi fromanfcharset0fprq2{*panose 02020603050405020304}Times New Roman;}{f34fbidi fromanfcharset1fprq2{*panose 02040503050406030204}Cambria Math;}
[code]....
View 21 Replies
Feb 24, 2012
I am trying to open an Excel file using the following commands:
xlsWB = xlsApp.Workbooks.Open(filename, , True)
where 'filename' is the name of the file.However I am getting the following error message:
Message = "Old format or invalid type library. (Exception from HRESULT: 0x80028018 (TYPE_E_INVDATAREAD))"
I originally developed an application where I used the above code with default language setting of "English" (under regional and language settings). When I am changing the language setting to "French", the above errror comes up. I am changing the language setting to French in order to simulate an error when this application is run in a French version computer.
View 3 Replies
Mar 9, 2010
I am need of help. I need to know how to convert Binary to BCD in VB 2005 C++.
View 1 Replies
Jul 21, 2010
In VB6, it was easy enough to just use get and put.However, in VB2005, I cannot for the life of me figure out what the equivalent code of get and put are?
View 2 Replies
Jan 11, 2011
i need to read binary file and in this file found the string and replace it with other one and save the file afterwords. I found many example to read binary, but to find and replace is for me mistery.
View 3 Replies
May 4, 2009
I need to write data to a file, preferably in binary format, but I am unaccustomed with the concept. Where's the easiest place to get the basics? I could come here with a specific need, but I'm at the point right now where I am more willing to work within the confines of keeping it simple.
Here's what I know:
1. how to open a new file
2. how to specify the record length
3. how to close the file
Some specific questions:
Does the record length have to be constant throughout the file?
Can I read the nth record without reading the whole file?
View 8 Replies
Oct 30, 2009
i want to read/write to some files.Specifically my application searches text files but i also want it to search binary files. The problem is : how will i know when the file is binary and not text ? Also how will i get the hexademical contents of a binary file ?[URL]
View 2 Replies
Oct 21, 2009
oDoc = oWord.Documents.Open(My.Settings.DocPath & "Letter.doc")
HOWEVER, whenever the debugger hits this line, it simply quits. No the application doesnt quit, no it does not hit the finally, end try or End Sub...it simply quits the sub. Actually, I think it causes the app to freeze but hard to tell because it happens in a dialogue form and this causes the dialogue form to bypass its close statement!
View 2 Replies
Jun 14, 2009
I've gone through about 16 hours and two packs of cigarettes trying to figure this out. First a little background. I was using 6.0 up until 2004 when I went to prison. I'm out now, and trying to relearn the trade, using VS 2005. I'm currently porting some 6.0 code from another project, SpyCast Webcam Studio, into VB 8.0. It's disheartening, to say the least. None of the old built-in subs/functions work anymore, so I have to scour the forums to relearn each and every function.The section I'm doing now takes a snapshot from the webcam (Video API --> PictureBox --> Save as Jpeg), then upens the file to upload it to the server via HTTP POST. I've been using this code in SpyCast for years with no trouble, but I spent many hours trying to piece together the right code to open the binary file to read its contents. I pieced together two methods I found around the forums, one using FileStream() though the code I found wasn't for binary files, even though it said it was, so that code doesn't really work. Method two uses Microsoft.VisualBasic.FileOpen() and works better.
Here's the kicker. By the time I run through the rest of the rigamarole of uploading the file, by the time I read it on the webserver, it's *slightly* corrupted. It's a valid Jpeg, no errors, but the picture looks like when I use to watch the Playboy Channel when I was a kid scrambled with weird colors and whatnot. [code] Each "chunk" is basically one "line" of the file. It looks like a single LineInput() return is the text between two carriage returns. Am I correct? I tested this with a flat text file, and it looks true. However, That one input line returns the text or data with the carriage returns *stripped*! ***?!? =( Fine, I have no problem adding my own vbCrLf to each LineInput(), if I were opening text. but this's binary. A character could be Chr(10) or Chr(13), both of which are removed from the original file contents.So I could very well need to use something other than LineInput(), but I haven't found any other examples on the web using this method.
View 1 Replies
Jan 27, 2011
I have created a splash screen and it fades in. When the splash screen closes, the main form (MDI) should open. The main form opens but then immediately closes.
vb
Public Class frmSplash
Private Sub frmSplash_FormClosing(ByVal sender As Object, _
ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
'Open the MDI form.
frmMain.Show()
End Sub
[Code] .....
View 3 Replies
Jun 11, 2009
A query concerning opening and saving a file.i have two commands, one the opens and another that saves [the same file].i'm using the StreamReader and StreamWriter methods.issue is this:if i comment out the open code, the save works fine.if i comment out the save code, the open works fine.if i let both run together, i get an error, usually with the save saying that the file could not be accessed. note, before anyone asks, i do close the file after saving or opening what could be the problem? open works fine, because it usually happens prior to the save, and then save process cannot access the file..?
View 3 Replies
Feb 9, 2009
i need assistance that will help me open word document in window form. i will be glad if someone can furnish me with sample code .
View 1 Replies
Mar 13, 2010
how I could check if a certain file is in text or binary format?I'm using VB.Net 2008 Express.
View 2 Replies
Feb 2, 2010
Program to convert binary pdf file to tiff file in VB.NET..?? We can use third party tools also..???
View 1 Replies
Dec 8, 2009
I'm trying to use my existing application to open tiff files for clients and staff in order to print or view the reports that we have scanned into our server. Unfortunately I have been unable to find a free, preferably open source library or wrapper for a library that will work in VB.NET running through Visual Studio 2005. Does anyone know of any open source/free implementations of this that I could adopt in my application?
View 1 Replies
Oct 23, 2011
however, I am stuck at BinaryReader.actually this is what i am trying to acheive through VB.NET.say for the following file type :
JPG file = FF D8 FF E0
BMP file = 42 4D BE 4E
PNG file = 89 50 4E 47
GIF file = 47 49 46 38
the above are the 4-byte headers in Hex(raw) I need to read these headers of any given file using OpenFileDialog using Button1_click event,on selection of any given file(*.* filters ON)it should use the BinaryReader and look for only 4-bytes starting from offset 0, and it should not go to EOF marker (-1).and have a variable to hold this 4-byte header value, to run this in a database table which will check the same header value in the table and would display the corresponding extension of the file. from the table.
I can do this using case, if then...etc.however, I have to do it using Database and also i need to check for testing purpose to use MsgBox() to display this variable which is holding the 4-byte header.however, the MsgBox doesnt allow anything other than String.
PS: I tried studying the methods like:
FileOpen/Seek/Peek/ReadBytes().
but still not sure how to get them work.
View 2 Replies
Apr 29, 2012
I need to save a datatable to a binary file , in binary format , in order to make the process fast because the datatable may contain up ten millions rows. So , XML is not favorable because it makes the file large sized , and the process will be slow.
I managed to save the datatable to a binary file , and it works fine , but the problem when I try to add new rows to the existing binary file (using a datatable with the same schema , but different rows data) , it copies the schema of the datatable to the binary file, making it very large.
[Code]...
View 1 Replies
Feb 15, 2012
I have a program that can save user's input into a text file and load it back, but whenever I try to open the file and exit without selecting the file I get an error.(if i select the file and open it i don't get any errors).
This is the code that handles text file loading:
Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Click
OpenFileDialog1.InitialDirectory = "C:"
OpenFileDialog1.Filter = "Text Files ONLY (*.txt) | *.txt"
OpenFileDialog1.ShowDialog()
[CODE]...
The error is :"FileNotFoundException was unhandled. Could not find file at xxx". also I would like to know how to make it so that the initial file name for file saving is today's date. I do not get any errors when I try to save the file.
View 7 Replies
May 22, 2012
I need to open an excel file from vb.net and then search it for specific data. I then need to take those data and insert them into text boxes on a form that i have created. This is all controlled by a button click. I already have some code that will open a file dialog box and let me navigate to the correct file, but I am having trouble with the search portion. I have tried the Find function but I am not sure of the proper syntax. I am using Visual Studio 2008 and Excel 2003.
[Code]...
View 7 Replies
Oct 13, 2009
I have a Binary file that has data represented in 1604 bytes. each set of data within these groups is composed of short (2 byte) numbers. I would like to creat a vb.net program that takes this binary file then converts it to numbers, and then places it within a new text file. How would I accomplish this?
View 9 Replies
May 21, 2009
Ok what i want to do is have a user specify a directory when this for is opened and have it remembered everytime this for is open,Also i have a few buttons and whenever the user clicks on one of the buttonsa i want it to open a txt file delete everything in it and write a value that i specify
View 9 Replies
Jul 20, 2009
I'm having a slight problem getting my program to load a save file when double clicking the save file.I'm using the Command$() to get the command line argument. I can open a save file by dragging it onto the exe. But not by double clicking the save file (after it's associated with the exe).I though dragging and dropping a file on a program and double clicking the file would open it in the same way, but I guess not.So in short how does file association work and how do I get the file path set to a var when the program loads.
View 5 Replies
Aug 30, 2009
I am reading a Binary file using BinaryReader in VB.NET.The structure of each row in the file is:
"Category" = 1 byte
"Code" = 1 byte
"Text" = 60 Bytes
Dim Category As Byte
Dim Code As Byte
[Code]...
View 3 Replies
Feb 27, 2010
i have a file any type of file and i want to display the binary of that file the (01) of that file can do it also i want to display the hexa which it better and faster if u just can put me on track
View 4 Replies
Aug 22, 2011
is anyone know how to get BMP image from binary file?
Offset Length Description
100 4 BMP_offset
268 4 Cover_size
296 4 Cover_offset
View 10 Replies
Mar 16, 2012
I've been using VB.NET for a few years now, but I never really got into binary files. How do you add onto binary files from the beginning? Here is some example code:
Dim writer As New IO.BinaryWriter(IO.File.Open("C:\Users\Dameon\Desktop\newbin.bin", IO.FileMode.CreateNew))
writer.Write("HELLO WORLD!")
[Code]....
How can I add onto the beginning of the file without overwriting what's already there? I'm trying to make my own file archive format. I have the compressing/decompressing down, but now I'm implementing adding/deleting a file after the archive already made.
View 5 Replies
Apr 15, 2009
I have existent binary files with this structure[code]...
View 13 Replies