Byte Conversion To Single Number
Aug 4, 2010
I am totally new with VB.NET. I have started coding for Modbus protocol. The response that I receive from the slave is as below -
01 = byte slave id
03 = byte function code
04 = byte -no. of bytes sent by slave
00 = byte(8 bits) (Lower Register MSB)
00 = byte(8 bits) (Lower Register LSB)
64 = byte(8 bits) (Upper Register MSB)
00 = byte(8 bits) (Upper Register LSB)
2bytes for crc
Now I want the value of 64 00 00 00 into floating point number in Vb.net . I think in vb.net its single as its 32bit floating precision number. Now the bytes that I need are 00 64 00 00 but if i process in this way the output is different, so I tried manually putting the data into the byte array and found out that I need 64 00 00 00 to be processed so that i can get desired output.
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Mar 16, 2011
Trying to upload a picture file from an online source and store it in a byte array but am having the error: "Number of Indices is less than the number of dimensions in the indexed array".
Dim Bytes() as Byte
Dim Inet1 as System.Net.Webrequest
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Oct 7, 2010
I m new to this forum and also to VB.net programming. In an application Modbus protocol is used and I have generate LRC checksum for that. But I am stuck at conversion of a Long type data to Byte type. The long type data is for example : 4294967197. I tried all the following functions:
1.b = Byte.Parse(4294967197)
2.b = CByte(4294967197)
3.b = Convert.ToByte(4294967197)
[code].....
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Nov 7, 2010
I have a variable as a single. what is the value of second byte of my variable.or what is the value of third byte of my variable value in memory.?in c language we use at like this *(char(&x)+1)which method do the same thing in vb.net
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Feb 7, 2010
I have a Generic List of Bytes with Hexadecimal values stored in it. for example, elements 0 to 3 contain 42 9E D1 EC which as a single, is equal to 79.41. I've tried using:
dim foo as string = ""
for i as integer = 0 to 3
foo = foo + system.convert.tosingle(byteArray(i)).ToString
[code].....
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May 2, 2011
I'm trying to make to do a widening conversion from a byte to an integer. form has a text box for both Input, and Output, plus a conversion button. [Code] I'm trying to use a catch block, but I'm not certain how it works exactly, and also tried to use an If statement to avert the issue, but that didn't work either. When ever user inputs a number greater than what can be held within the Byte data type the program crashes from the run time error. [Code] and an error message pops up in the compiler saying overflow exception was unhandled.
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Feb 26, 2012
i would like to convert a single byte to a string.
dim mybyte as byte = &h11
dim mystring as string
i tried
[code].....
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Dec 4, 2009
Ok, this is going to be a bit bizarre, but I'm looking for something strange, so all suggestions are welcome:I have a function that takes a single byte as an argument. From that byte, without using any random function, I need to create two other random bytes. I specifically cannot use the Random object, but fortunately, the other bytes do not need to be random relative to the argument. Also, the argument is random.
Therefore, one other byte can be created by XORing with &HFF, which will create the inverse of the argument. Since the argument is random, the inverse is also random. I need one other technique that will create that last pseudo-random byte. I thought about bit shifting, but that results in something quite a bit less than random (it will be biased high or low, depending on the bit shifting).
One possibility that I am trying is to use CByte(100000/arg). Does anybody have any other suggestions?
EDIT: The result of that equation for all values of the argument is a very interesting pattern. It will probably be fine, but I'd still take suggestions.
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May 7, 2009
I'm writing a C# application that reads data from an SQL database generated by VB6 code. The data is an array of Singles. I'm trying to convert them to a float[]
Below is the VB6 code that wrote the data in the database (cannot change this code):
Set fso = New FileSystemObject
strFilePath = "c: emp emp.tmp"
' Output the data to a temporary file
[Code]....
The problem here is the VB6 binary to string conversion. The VB6 string char is 2 bytes wide and I don't know how to transform this back to a binary format I can handle.
Below is a dump of the temp file that the VB6 code generates:
And here is the dump of the data as I read it from the database in (=the VB6 string):
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Aug 25, 2010
how to convert byte array to memory stream in vb.net.
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Jul 5, 2011
I have a byte array with 512 Elements and need to get and set a single bit of a byte in this array.The operation must not change any other bits, only the specified one.So if I have a byte like &B00110011 and would like to change the third bit to 1 it should be &B00110111.
Like this:Dim myarray(511) as byte myarray(3).2 = 1 ---> This would change the third bit (start counting at 0) of the third byte to 1 I know it should be easily possible using bit-masking but I don't have the time to try for days to get it working.
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May 23, 2011
I have a strange problem with the following code:
Code:
Private Sub Listener()
Dim infiniteCounter As Integer
[code]......
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Jul 15, 2011
I am getting this warning in my code, and for the most part I have ignored it.
Friend Sub StartTablet()
Dim success As Boolean
Dim eventObject As IntPtr = IntPtr.Zero
[code]....
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Jun 13, 2011
[Code]...
The code compiles and seems to run correctly, but is underlined with the message "Implicit Conversion from 'Double' to 'Single'" Why would this be an implicit conversion if each of the variables is cast as a Single? Is this something I should worry about or change?
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May 19, 2010
Pulling a record from the DB and populating a list view but keep getting conversion from DBNull to Single is invalid (words to that effect). The code is below with bold highlighting where problem is and a bit more helpful description of error. I get this error: "Conversion from type 'DBNull' to type 'Single' is not valid." [Code]
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Aug 27, 2009
I'm new to .net. I would like to know how to convert a text data in string or in a file into a simple byte array[ ] format.
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Sep 7, 2009
I have a problem using FJ Core to convert image into byte.
I have a code written in C# which works fine.
The problem is when im running it in VB i get the exception: Arithmetic operation resulted in an overflow
It works fine in C# to convert a negative number into byte For Ex. (byte)-90024 = 88
But when i try to do it in VB i get the exception.[code]...
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Mar 10, 2010
I need to send a number as a byte (0-255).
SerialPort1.write(123)
sends 3 bytes representing the numbers 1 2 and 3. I need to send 1 byte containing 123.
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Aug 7, 2010
Why does C# define Byte+Byte=Int32 instead of Byte+Byte=Byte like VB?
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May 17, 2011
I understand the concept of bytes and declaring variables to save on processing space. I understand that the max value that can be stored in a byte is 255. I cannot seem to wrap my head around my current issue. I don't have much experience working with byte manipulation.
[Code]...
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Dec 7, 2010
How can I insert a negative number into a byte parameter?
Something like this:
Dim b As Byte = -111
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Apr 27, 2012
I have this code:
Public Class Beryllium
Public Const AtomicNumber As Byte = 4
Public Const Symbol As String = "Be"
[Code]....
I want to make a list out of all the constants (AtomicNumber, Symbol, Name and AtomicMass). I want to make the list also a constant. When I run the code above, I get an error highlighting AtomicNumber (on line on which I commented on "This line"). I tried .ToString() and CStr() but I get errors on both. Maybe there is a different way to make these constants one string or list (must be public and have new lines)?
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Oct 7, 2011
How do you convert a number as text from 1 to 001----Then 10 to 010 and 20 to 020 all the way until 99 to o99. All final numbers must be 3 Digits (data type Text)
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Nov 27, 2010
I have a string such as
Dim my_sum As string = "100*10-5"
but when i do this:
msgbox(mysum)
it will output "100*10-5"
but i want it too output it so it works the sum out which should be 995
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Aug 7, 2009
colordialog1.color will yield "Color [A=255, R=95, G=33, B=222]", but i would like to return an integer like 2349821 instead. how is this possible?
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Apr 18, 2011
This is more of a curiosity question on what the VB compiler is doing. Basically the following code generates an error,
If "String" = CInt(1) Then
End If
As it should. What makes me curious is the error reported is
Conversion from string "String" to type 'Double' is not valid.
So, I guess my question is, why is the compiler attempting to convert to a Double when I would assume it should be converting to Integer?
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May 13, 2010
I have been using this code for a long time now and it has always been accurate. I recently tried to convert a large string from one base to another and some weird stuff happens.
When I convert from base 36 to base 10, the result is accurate. When I convert the result back to base 36, it becomes inaccurate.
[Code]...
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Oct 4, 2010
i want to convert following number to character equivalent but without using any special character.
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Dec 10, 2009
Why am I getting that error message? This is the code which it's happening to:
Public Class frmford
Dim LoanAmount, InitialPrice, Make, TradeIn, OriginationFee, DepositAmount, Model, Options, AirConditioningTax, GST, PST, Total, Subtotal, APR, Months, RoofRack, SunRoof, SideAirBags, TintedGlass, RearSpoiler, GPS, PowerLocks, FreightAndPDI,
[Code]....
I tried to Dim those variables as double and it didn't work either.
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Feb 20, 2012
I have already completed most of the program and it works, except when there is no input in the Fahrenhiet or is left blank.I get the following exception: on this code: Inputsingle = CSng(TextBox1.Text).Conversion from string "" to type 'Single' is not valid.Here is my code:
'Project" Convert Tempertures
'Progammer: Cathy R. Hjelm
'Description: Convert Fahrenheit temperture to Centigrade Temperature using a convert button and output Text Box[code]....
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