What's the proper way to convert a Vector3DF into byte array?

What's the proper way to convert a Vector3DF into byte array?

By : user2956320
Date : November 22 2020, 10:54 AM
wish of those help I am implementing Kinect's FaceTrackingBasics-WPF C# code to track the position of some object. Tried to collect a Vector3DF type variable into some byte array using Buffer.BlockCopy as follows: , here is a way using interop techniques
code :
    //sample data
    Vector3DF v3df = new Vector3DF(10, 20, 30);

    //get data size
    int size = Marshal.SizeOf(v3df);

    //allocate memory
    IntPtr ptr = Marshal.AllocHGlobal(size);

    //copy data to memory
    Marshal.StructureToPtr(v3df, ptr, false);

    //copy data from memory to byte array
    byte[] bytes = new byte[size];
    Marshal.Copy(ptr, bytes, 0, bytes.Length);

    //release memory

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RandomAccessFile: write(byte) in a loop or write(byte array), whats more effiecient?

RandomAccessFile: write(byte) in a loop or write(byte array), whats more effiecient?

By : Reesh
Date : March 29 2020, 07:55 AM
may help you . Writing a byte array is always going to be quicker than repeated calls to write one byte at a time. There's much less overhead (method calls, IO).
Whats the diffrence between an array<Byte>^ and a byte*?

Whats the diffrence between an array<Byte>^ and a byte*?

By : TonyZhang
Date : March 29 2020, 07:55 AM
I wish did fix the issue. array^ is a handle to an object in the managed heap, byte* is a pointer to an unmanaged byte. You cannot cast between them, but it is possible to fix the managed array and obtain a pointer to the elements within it.
EDIT in response to first comment:
code :
// pin_ptr_1.cpp
// compile with: /clr 
using namespace System;
#define SIZE 10

#pragma unmanaged
// native function that initializes an array
void native_function(byte* p) {
    for(byte i = 0 ; i < 10 ; i++)
        p[i] = i;
#pragma managed

public ref class A {
    array<byte>^ arr;   // CLR integer array

    A() {
        arr = gcnew array<byte>(SIZE);

    void load() {
        pin_ptr<byte> p = &arr[0];   // pin pointer to first element in arr
        byte* np = p;   // pointer to the first element in arr
        native_function(np);   // pass pointer to native function

    int sum() {
        int total = 0;
        for (int i = 0 ; i < SIZE ; i++)
            total += arr[i];
        return total;

int main() {
    A^ a = gcnew A;
    a->load();   // initialize managed array using the native function
How to convert Cp1252 byte array to a proper string?

How to convert Cp1252 byte array to a proper string?

By : user3196490
Date : March 29 2020, 07:55 AM
Does that help I noticed your phrase - "proper string", and would like to point out that there is no such thing as a proper or improper string in your case. It's the encoding that is either proper or improper.
You're reading the byte sequence of cp1252 bytes, and appending the individual characters into a buffer. If the original file is in cp1252, there are no problems with this process. Under the hood, the InputStreamReader employs a CharsetDecoder that is capable of decoding the underlying charset of the stream, into a sequence of sixteen-bit Unicode characters (UTF-16). This is done, because you are reading characters from the byte stream.
Endianness - How to convert a c# integer into a big-endian byte (no byte array, just a single byte)?

Endianness - How to convert a c# integer into a big-endian byte (no byte array, just a single byte)?

By : Skarface
Date : March 29 2020, 07:55 AM
I wish this helpful for you Your problem has nothing to do with endian-ness. When you're doing arithmetic, it doesn't matter whether the system is big-endian or little-indian. That is, given this:
code :
int len = 260;

byte highByte = (byte)(len >> 8);
byte lowByte = (byte)(len & 255);

Console.WriteLine("highByte = {0:X2}", highByte);
Console.WriteLine("lowByte = {0:X2}", lowByte);
System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
string tramaISOHeader = enc.GetString(tramaISOBytes);
proper way to convert byte[] to array with dots

proper way to convert byte[] to array with dots

By : John Bocharov
Date : March 29 2020, 07:55 AM
hope this fix your issue I'm capturing data from a pcap packet; in my code I have a byte[] data and I want to decode to String using new String() constructor. , One could do a String.replace, but more correct:
code :
int n = 0;
for (byte b : data) {
    if (32 <= b && b < 127) { // Within ASCII
        data[n++] = b;
String datastr = new String(data, 0, n, StandardCharsets.US_ASCII);
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