I have an image that has dimension of (100,100). I am using FileStream class. When I run the code I get EndOfStreamException error at line 44. I have pasted the for loop section of the code below.
For x = 0 To 99
For y = 0 To 99
byteRead1(x, y) = br1.ReadByte ' line 44 (exception thrown here)
[code].....
Can I save an array into my .bin file then read the array again just like a string or Integer??
View 2 RepliesSome binary files have application variables at the end if you open it with a text editor you can see these variables. Now when I read these files into the processor memory the program does not work properly, however if I read a file without this it works fine. So how can I read a byte[] array to EOF so that when I pass that byte array into win32 api create-process it will create the process without corrupting the program?
View 3 RepliesI'm trying to read the binary data from a binary file with the code below but the it's return the value in the byte array. How can i read the binary data from the binary file and then convert the data into string?This is how i create the binary file.
Dim fs As New FileStream(Application.StartupPath & "Agency.dat", FileMode.OpenOrCreate)
Dim bf As New BinaryFormatter()
Call bf.Serialize(fs, GAgency)[code]....
I want to read a string into a binary file. This string is repeated every certain length ... example:
Start Offset: 694
End Offset: 2248591
Long of string: 25
Sequence Length: 110
I want to read the file and add the strings in a listbox.
I have a client and server: I cant get the server to extract the byte sent to it.
Server:
Imports System.Net.Sockets
Imports System.Threading
Imports System.IO
Imports System.Net
[Code]...
I need to create a collection of millions of objects, each object has 3 double and one integer fields.If I remember (after more than 20 years without using C) in C you would allocate enough memory using a struct and an array, and read all the file content in one shot.In VB I created a class with the 4 members, and this constructor:
Sub New(BR As IO.BinaryReader)
X = BR.ReadDouble
Y = BR.ReadDouble
[code]....
I'm working on a new application for one of my Managing Editors at my company. We are wanting to build an application that only has 4 combo boxes for user options and then according to the options that the user selects, the application will spit out 3 random lines of text that can be copy and pasted into another application that we use.We are in the process of creating a rather large (1000's of lines) CSV file that we are going to use as a repository for the text. Let's call the data file SRG9000Data.csv..I'm almost 100% certain that I'm going to need to read in the entire datafile as an multidimensional array because we are setting up the CSV file as follows:[code]For each of THOSE categories, I'm looking at having 8 possible items for <Sports>, and 3 items for <PlayType>, <GameImpact>, and <Scoring>. <Text> is being use as a possible Text Phrase that the system can select from randomly provided that the other area's of the array are met.The CSV file will have 1000's of lines. Of those, the system will "filter" though all of them so that ONLY the ones that meet the selected criteria can be used, then choose 3 of them randomly and use that as output.
Extra information: I am currently establishing that the CSV file being used is setup as 0-7 for <Sports> (0 = Baseball, 1 = Basketball, etc..), 0-2 for <PlayType> (0 = Defensive, 1 = Offensive, 2 = Other), 0-2 for <GameImpact> (Negative, Neutral, Positive), and 0-2 for <Scoring> (0 = Non-Scoring, 1 = Other, 2 = Scoring); <Text> is a String.I am clueless when it comes to setting up an array like this; It's been many many MANY a year since I worked with array's in QB and I feel I may need more than a refresher course.Now, if I'm understanding correctly from some of the forum lurking i've been doing, multidimensional arrays CANNOT be of mixed type, correct? If this is the case, the how can I read the entire CSV file into an "array" (if you will) so that it contains Integers AND a String? [code]
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 RepliesI 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?
I have existent binary files with this structure[code]...
View 13 RepliesI need make an application that gets binary code from a file, such as a .exe, (in 8-bit form) and display the charectors in a RichTextBox .BUT! The catch is I need it to do the process REALLY fast, like in a 5th 0.5 of a second. I have a method but it takes way to like, sometimes 5 seconds for 1 file, which isn't what I want This is the code I have:[CODE]......
View 9 RepliesI'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.
reading a 16bit binary file (tiff image). Since the file is in 16bit, pixels of the file stores values ranging from 1200 to 4500. I want to retrieve those values. I used ReadUInt16 since the file has a 2byte data type but keep getting EnfofStreamException Unhandled error.
Dim f1 As New System.IO.FileInfo(TextBox2.Text)
fLen1 = f1.Length
Dim snglRead As Single
Dim i As Integer
[code]....
To read a record in a binary file in VB^ I would define a type with all the fields specifying strings as STRING * whatever the length of the field was.
For example:
Type Record
Field1 as string *15
Field2 to as string * 20
Field3 as String * 10
field4 as byte(10)
End Type
Dim filerecord as record
I would the open my binary fiel and do a Get#1,, filerecord
The record would be read and all the fielsd would be in place.
Now with the new Structure we cant dimension an array in the Structure And wjhen declaring strings we can't specify the length.
I tried to create structire and use a stream binary reader. and just read afixed number of bytes into the type, The program says it canvert bytes to my fiels.
So how do I do this. Or has Microsoft in their infinite wisdom left no way to do this.
How do I read a raw byte array from any file...
Dim bytes() as Byte
..and then write that byte array back into a new file?
I need it as a byte array to do some processing in between.
I'm currently using:
To read
Dim fInfo As New FileInfo(dataPath)
Dim numBytes As Long = fInfo.Length
Dim fsAs New FileStream(dataPath, FileMode.Open, FileAccess.Read)
[Code]....
I'm a beginner programmer, but this may not be a beginner program question. I would like to write a program in small basic or visual basic that reads data from a binary file. The data are formatted in hex and look like this:
[Code]...
Im trying to read and write to a file in binary.to give an example of what im trying to do i have posted a picture below.the string is 12 bytes long and each four bytes has a float.the one in red is set at 1 and green and blue are 0 giving the read as the overall color. i have been trying to get this well i tried once and gave up but its been awhile.i have this so far but it doesnt work. this is kinda what i got to read the bytes out but its messed for i have been trying everything i could think of
Code:
Dim s1 As FileStream Dim br As BinaryReader s1 = New FileStream(Application.StartupPath & "/files/test1.bin", FileMode.Open, FileAccess.Read) br = New BinaryReader(s1) Dim bytes(12)
[CODE]...
I have this to write the color back from a color dialog
Code:If dlgColor.ShowDialog() = DialogResult.OK Then
PictureBox1.BackColor = dlgColor.Color()
[CODE]...
I am using BinaryReader class to read binary file.But I am facing problem while reading number of bytes from it.I have written code to read only 2 bytes from it,it works well on my machine and read only 2 bytes,but when I deployed that code on server machine it read 4 bytes from file.Whats wrong in the code?Is it due to processor i.e.. 32 bit processor/64 bit processor.
View 2 RepliesI want to save some data to a binary file, and read it later, as in several strings of data.
My objective:
To save the following things...
1. 3 different strings of data, and be able to easily read them later.
I used to read a binary file by formatting a record type and then using the Get command to get the data. What is the equivalent in VB.net?
Code:
'In Module.bas
Public Type recordtype
dist As Single
[Code].....
How could i read a string into a binary file Encoding.UTF8.(the string has a length of 25 bytes)
Using fs As New FileStream (OpenFileDialog1.FileName, FileMode.Open)
fs.Position = 2096
Using br As New BinaryReader (fs)
For x As Int16 = 2 To 25
[code]....
I'm having problem reading Binary file that has two types of data in it; Strings and numeric data in decimal format.[code]...
1. The loop doesn't stop, and it gives me "Unable to read beyond the end of the stream" Error..
2. The output isn't accurate, apart from a few random correct strings and numbers..
3. After the loop is fixed, how can i save the data to an Array or write it to a text file?. Can the be saved line by line so that the output file has the same number of lines?
4. As you can see in the code, I've tried writing data in a file, but it doesn't work.. Messagebox does show some data (even though it's not accurate), the file however doesn't contain any data..
I ran across my first unicode data, and I am not sure what to do with it. I read the unicode text from a binary file using the ReadBytes method, because ReadChars threw an exception when it tried it. Well, long story short, I have found a way to work with the data, I can convert it using a small Function I wrote, which goes something like this: [Code] And this works wonderfully. It just throws away anything not in the ASCII range, including the BOM at the start of the unicode data.
But I would guess that this method is not very universal and probably not the best way. Are there any VB functions available to do this sort of thing? I was able to find something called Text.Encoding, but there didn't seem to be a reverse of that not that I found anyhow. Any ideas?
how to save an array of structure to binary file. I tried the binary formatter but it still aint workin. My code attached
Dim directoryList As String()
Dim fileData() As myData
Dim myFile As myProps
[Code].....
I have a windows form which to summarize lets the user open a file containing 32 bit hashes, then search for one of them. The hash is then converted to its string representation. The application is giving the results I would expect but I'd like to make it execute faster than it does now; some files can be pretty big > 100 MB.
I'm doing the file read using a BackgroundWorker object to display progress updates and ensure that the UI is available during the process. But for that i need to add a System.Threading.Sleep(1) instruction in the loop; otherwise the application freezes with big files. And System.Threading.Sleep(1) creates a noticeable lag. Any suggestions on how to make searches fast without freezing the UI? Getting speeds comparable to hex editor programs for example.
I am working with binary files that have 500 rows and 500 columns (width x height). When I load these files into array I set width and height variables to 500 and I was wondering instead of hard-coding like that how I can code in a way that the program should find the # of rows and # of columns of the file before loading the file into array...
View 15 RepliesI have a device with upon serial communication , it send the data as HEX values , (eg, C020042ABD0F91A103E400F929EBC) . I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
[code]....
I have a device with upon serial communication, it send the data as HEX values, (e.g., C020042ABD0F91A103E400F929EBC). I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
Dim bCount As Integer = 4119 ' it is the size of the chunk not block size
Dim data(bCount) As Byte
[Code] .....
im trying to make an example program for a teacher friend of mine
Springfield
Toledo
Youngstown
[Code]....
thats just what i have so far but im really having trouble getting the other part into a 2d array. i want the second half to look like this when done: the oppsite of what it looks like in the file.
001
359
203948