I wrote some software in Vb6 a long while ago and this program creates a datafile. This datafile stores variables like doubles, ints, arrays etc, using the Get/Put methods from VB6. This all worked great for vb6.I am now starting to rewrite this tool in .net and find that the binaryreader as well as the other fileopen methods do not convert the doubles correctly. So as I rewrite the software I still want to read the old datafiles just like before.if I use a byte array and read 8 bytes, the bytes read are identical in Vb6 and vb.net. We are talking about reading an existing old binary file created by vb6.
for example the number 3, stored as a double has a 8 byte array that looks like this:
[0][0][0][0][0][0][0][5] in vb6.
in vb.net if you use the bitconverter.getbytes(cdbl(3)) you get
[0][0][0][0][0][0][8]64]
in vb6 the first array is converted to the # 3 correctly.in vb.net the array is converted to something way way off.
How can i get the same output as the VB results. And i have tired it ! Type conversions, math functions, everything i can think of to get the same VB6 output !
i have a table in sql server with some fields set as Byte() (System.Byte[]) when i import them in my application to be used with linq they are converted in Binary (System.Data.Linq.Binary)why is that?is there a way to prevent this wrong translaton???if i update the database how can i update the classes that has been craeted in visual studio2008?
I am attempting to read a series of double prcision float values (x,y,z coordinates) from a binary file using the binary reader. Everything works fine except that when I read the number back it is different then the number that was written there (original file is generated by mining application).
written number : 78897.6476586 file contents hex : 40 F3 43 1A 5C CF 43 A4 this converts back to the same number as written using a IEE 754 conversion program. VB returned value : -5.45100266729248E-134 using .readDouble()
I have tried to step thru the file in one byte steps to make sure that I have the proper start position but that did not help any.
just want to know what is the difference between these date values?Once some one told me that its difference is server date and client date but not sure which one he meant.Below is 3 type of date currently I'm using and don't know what is the difference between them.
DateTime.Now is from System.DateTime.Now Now is from Microsoft.VisualBasic.DateAndTime Today.date is also from System.DateTime
I used backgroundworker to receive file segments from a server, it taking the segments and save them directly to a binary file. the problem is,I using a global variable to store the "FreeFile()" number.when "backgroundworker" receive "START" it do F = FreeFile()
when it receive "Segment", it should append to that file, but the problem is ... backgroundworker no more recognize the file (which its identifier saved in global variable F) and telling "Bad File"?!
whats the soultion?I think about opening the file and close it each time (not leave the connection to the file available). But I didn't figure out how to append to Binary files, It always replace their contents. and If I use "Append" option it corrupt the file!
For some reason the last PDF file to be written to the "final document" is the only PDF File that is visible when the "final document" is open. However, all of the bytes are accounted for in the file size...so for example: file1 = 60 bytes and file2 = 49 bytes. The final document has 109 bytes but only contains file2 when viewed in the pdf viewer.
I want to scrape string data from some binary text files that contain embedded SQL tatements. I don't need any fancy cleanup--just some way to extract the readable text
The program photographs people and save it to the database (SQL Server 2005 VARBINARY(MAX)) .Sometimes we get a bad picture means a binary file looks like '0X00' or somethng like that and when we try to display the picture we get an error. How can I check via VB.NET the validity of the binary file before saving it to the database Best Regards, Uri Dimant SQL Server MVP [URL]
Public Function LoadBinaryFile(strFilename As String) As Byte() Using fsSource As FileStream = New FileStream(strFilename, FileMode.Open, FileAccess.Read) ' Read the source file into a byte array.
I am trying to make a program in Visual Basic 2010 that should do the following: -Open file as binary -Start with position 57 and read the following characters until a 0 is found, print the whole name
Inside the binary file, all the files' names end with 0 (which should not be printed), example: B000000.dat0 eft.dat0 G000000000.b70
For the above examples, the names that should be printed are B000000.dat, eft.dat, G000000000.b7 respectively. The code I wrote is below. The problem is that i am not sure how to read the name until the 0 is found since the names are variable in length and so are the extensions(dat, b7). Also some names have 0 in them which makes things difficult.
Using gs As New FileStream(fileName, FileMode.Open) gs.Position = 57 Using gr As New BinaryReader(gs) For x As Int16 = 57 To 70 Dim textvar(x) As String textvar(x) = gr.ReadChar text3 = textvar(x) & (gr.ReadChar) Next End Using End Using
I wrote a programme about 12 years ago in visual basic 3.Since then I have moved interstate and changed jobs quite a few time and lost the original Visual Basic 3 discs.Visual Basic 3 saved the files in a binary format that has not been used in any other version of Visual Basic. So now I cannot read or modify the files.
Using fs As New FileStream("C: estsomefilename.ext", FileMode.Open)Using rdr As New BinaryReader(fs) fs.Seek(225, SeekOrigin.Begin)Dim b() As Byte = rdr.ReadBytes(32)Dim s As String = Encoding.UTF8.GetString(b) End Using End Using End Sub
I have a requirement to create multiple fixed length files so that I can use the files for testing in another application. The following code causes an error when run.
I need to document binary files containing integer and real numbers. I use BinaryReader, and BinaryWriter classes, with functions like ReadInt16, ReadSingle, or ReadByte. The files should be readable by any other hardware architecture/OS besides x86/Windows.
I need to document the type of default binary encoding, and can't find the MS documentation.The best I found says that it uses UTF8, but as I understand, UTF8 is for text formats, not for binary numbers.
I suposse that the answer I are looking for, is something like "little endian" or "big endian" format.
I am trying to develop an application that will let me do the following
1) Be able to search to large binary files for a specific byte array (header) and to continue searching for another byte array (footer). Then i want it to copy the section of the binary file between these 2 locations to a specified file. Then the program is to continue searching for any other header/footers An example would be search a large file and carving out the jpgs it finds etc. This routine would have to be able to handle raw images of 20gb or more if needed.
I need to read a binary file. The Byte-Ordering in this file is different from the Intel-Standard. In good old FORTRAN I've used Equivalence-Statement in such cases (For example Defining a 4-Byte-Integer-variable and 4 Bytes at the same memory location / read the file as bytes / store them in the neccessary order / access the memory using the Integer-Variable). In VB dotnet I programmed a solution using shift-operators:
I am trying to write a simple application that monitors the COM port and writes the incoming binary data to a file. So, I gathered a File class is provided, but looking at its methods list in the Help page, I see no method for writing individual bytes (and the Write methods seem to close the file after writing).
How can I write a byte array into a file, keep it open and repeat this as necessary?
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]
I have some functions written in C that read & write large binary files (> 4 GB) using routines CreateFile, ReadFile, WriteFile & SetFilePointer, that use the HANDLE data type to access the file. Some others who are more familiar with Visual Basic would would like to be able to call my C routines to work with such large binary files. We particularly need SetFilePointer to jump around with the files.
I have a folder called "Documentation".I also have a menu option in my windows form app called "Help" that I want to launch a web browser and load the index.html file within this Documentation folder.To have this folder be copied to the installation directory at time of install, do I just add the folder to my project?How do I code the "Help" menu option to open a web browser and navigate to this folder?
How is it possible to open files (*.lva) made with my application by doubleclicking on them, as I can open MS Word etc files.My files are saved using StreamWriter member WriteLine.When I doubleclick on file made with my application, it has to fill some textboxes.I can open files through my application using ReadLine command, but not doubleclicking on them.I use Inno Setup Compiler to install my program and I'd like to associate *.lva files to open with my application.
