How can I get access in a fast way to the single bytes that form a double variable?
In pseudo-code I want to do something like this:
Dim myDouble as Double
Dim myArray(7) as Byte
myArray = myDouble
'continue doing things with the single bytes
The code is meant for use in a I/O-handler. The double-variables have to be sent / received via TCP. For this purpose they shall be put into / assembled from I/O-buffers.
Since I like to use the ReadAllBytes and WriteAllBytes methods to save my variables to disk, I have had no troubles thus far with Integers.It has been easy to convert a short integer into a string of two bytes to save them using WriteAllBytes as following example:-
ReDimxji(0 To 601) For I% = 0 To 300 J% = hbs(I%)
[code].....
But now I want to store some Single variables using WriteAllBytes, so I need to convert my single variables to a string of four bytes for each.
I have a situation where I am handling both single & double mouse click events on a form. In both cases something has to be loaded, however when a double click occurs, I do not wish to execute the code attached to the single click event.Is there a way to intercept the mouse click's and check if double or single and then execute the right event appropriately?
I have a single that might have a decimal place but might not. I have to put the digit before the decimal into the first 4 bytes and the digit after in the next 4 bytes.
So 1.1 would be 01-00-00-00-01-00-00-00 or 2.1 would be 02-00-00-00-01-00-00-00 or 1 would be 01-00-00-00-00-00-00-00
The digit before the decimal point is stored like an integer in bytes the same with the digit after the point. So 1.1 gets split into 1 and 1 and then stored as 2 DWORDS: 01000000 and 01000000
I would like to use the USB port power as source and use the an amplifier on D+/D- Twisted Pair signal wires as my command line. I saw a thread suggesting to use the output as PWM. How can I send a single byte or stream of bytes to the port. Is it possible to read status of the D+/D- if they are shorted together?
I have a BIN file which I need to write a single byte to at the end and maintain the previous data. Here is an example.Viewed with a hex editor the file may have F0 FD 48 D3 C0 as the data. I want to be able to add to the end of it FF so that when I view it with the hex editor it is displayed as F0 FD 48 D3 C0 FF. I know how to open files for putting data but how can I take those characters and write them to the end of a file. I tried using the put function ( Put #FileNo, , MyStr) where MyStr = the characters in the textbox but it doesn't seem to work. Here is some code.
There are these 19 bytes (I am looking for combinations not the number of combinations)
17 00 00 00 A4 EA DB 13 02 00 00 00 00 00 00 A3 D3 02 CC
I need any possible unique combination which matches these "rules":
at least 4 bytes long the order of the bytes can't change(so 17 A3 D3 02 CC is ok but A3 D3 02 CC 17 isn't, because in the original string 17 was at the being but A3 D3 02 CC was at the end)
Let me try giving you examples of possible combinations:
17 00 00 00 A4 EA DB 13 02 00 00 00 00 00 00 A3 D3 02 17 00 00 00 A4 EA DB 13 02 00 00 00 00 00 00 A3 D3 17 00 00 00 A4 EA DB 13 02 00 00 00 00 00 00 A3
[Code]....
See the bytes stay in the same order for example the first byte 17 can only in the first byte's place
I am trying to update a row or a single cell in ms access through vb.net. But when i update the text box named NRIC, say for example i want to update "s4522147B" to "tr4521856C" and mean while leaving the other fields the same.
But the thing is when i make the changes in nric.text (textbox), the dataset actually updates the whole column in the table instead of the selected textbox.
Follow-Up available: There's a follow-up with further details, see Convert MBF to IEEE.
I've got some legacy data which is still in use, reading the binary files is not the problem, the number format is. All floating point numbers are saved in MBF format (Single and Double). I've found a topic about that on the MSDN boards but that one only deals with Single values. I'd also would like to stay away from API-Calls as far as I can.
Edit: Just in case somebody needs it, here is the VB.NET Code (it's Option Strict compliant) I ended up with (feel free to convert it to C# and edit it in):
''' <summary>Converts a MBF Single to an IEEE Single</summary> ''' <param name="src">The MBF Single value</param> ''' <returns>The converted IEEE Single value</returns>
I have a problem with double and single quotes in a string.I have a textbox where i take a string from.In the textbox are double quotes and single quotes quotes.Problem is that if i return the string all the single quotes are replaced by double quotes.How can i get it to keep the single quotes as single quotes?
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?
I am a .net beginner trying to make a crossover from vb6. I am trying to copy bytes of integer to a variable but I am getting this error msg. PInvokeStackImbalance was detected
A call to PInvoke function 'Tutorial_Class Dog!WindowsApplication1.ModAPIFunc::CopyMemory' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.
Module ModAPIFunc
Public Declare Sub CopyMemory Lib "kernel32" Alias _ "RtlMoveMemory" (ByVal Destination As Long, ByVal _ Source As Byte, ByVal Length As Integer)
I am saving a text field that may contain a single of double quote.' or "If i use a double quote in my SQL save funciton I can save and use single Quotes. When I use a Single quote I can save Double Quotes. Yet not both.People use both, so I would like to know how I could change the delimiter to something other than a Double Quote for my text saves
How to access a variable that is located in a private sub and then display that variable in another private sub located on the same form.
My actual code is: Public Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click Dim strFileName As String strFileName = OpenFD.FileName OpenFD.InitialDirectory = _ [Code] .....
Obviously, the sub in blue has nothing in it currently and so this is the one I would like to access the variable in. The variable I want to use again is 'FILE_NAME'.
I have a vector class...and the magnitude is single precision...Now the problem is this, when I run this with option strict on, it gives me the going from double to a single error...Why? Does multiplication imply double precision?
So with option strict on, can you not multiply single precision numbers together and assign them to another single precision variable without first convert.tosingle?
What is the point of this? I am currently changing hundreds of lines of code in a project that runs perfectly...
So I have a class made in c++ and need to convert it into vb.net but I got problem converting a certain part of a function. [Code] What type of variable is "double&", I know a double but what's with the "&"? It isn't " double &dec_deg" so it isn't an address (pointers etc.)? and how would i convert that to vb.net?
When the clear button is clicked on my interface I need my variables that are set as doubles to clear...I tried setting them to zero but that messed up my equations and caused more problems. Is there some method in double that clears them out or sets it back to nothing.here's the coding
'button i need to clear my textboxs and variables Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
I've asked this question before, and so have many before me, i have done extensive research on the topic and stil no help. Maybe this is some kind of secret info. shared only amongst top programmers. Bt how do you really, trully double buffer a form, aside from setting "Double Bufferd" to true, which doesn't work in most cases, I want to know how do companies lyk Microsoft and Symantec, prevent flashes on big applications such Word and Norton.