如何转换float数组以一个byte []和回？ [英] How do I convert an array of floats to a byte[] and back?

问题描述

我有花车的数组需要转换为字节数组，并返回一个float [] ...谁能帮我正确地做到这一点？

我的工作与bitConverter类，发现自己卡住试图追加的结果。

我这样做的原因是这样我就可以节省运行时间值转换为IO流。目标存储天青页斑点的情况下，重要的事情。我不关心什么尾数，这是储存在，只要输入输出相匹配。

 静态的byte [] ConvertFloatToByteArray（浮动[]花车）
        {
            byte []的RET =新的字节[floats.Length * 4]; /​​/一个单精度浮点数为4个字节/ 32位

            的for（int i = 0; I＆LT; floats.Length;我++）
            {
               // TODO：卡住了......我需要追加的结果，一个RET偏移
                RET = BitConverter.GetBytes（花车[I]）;

            }
            返回RET;
        }


 静态浮动[] ConvertByteArrayToFloat（byte []的字节）
{ //去做 }
 

解决方案

如果你正在寻找的性能，那么你可以使用<一个href="http://msdn.microsoft.com/en-us/library/system.buffer.blockcopy.aspx"><$c$c>Buffer.BlockCopy.尼斯和简单，大概是快，你会得到管理code。

  VAR floatArray1 =新的浮动[] {123.45f，123F，45F，1.2F，34.5f};

//创建一个字节数组，花车复制到它...
VAR的字节数组=新的字节[floatArray1.Length * 4]。
Buffer.BlockCopy（floatArray1，0，字节数组，0，byteArray.Length）;

//创建第二个float数组和字节复制到它...
VAR floatArray2 =新的浮动[byteArray.Length / 4]。
Buffer.BlockCopy（字节数组，0，floatArray2，0，byteArray.Length）;

//我们有我们开始用浮漂的相同顺序？
Console.WriteLine（floatArray1.SequenceEqual（floatArray2））; // 真正
 

I have an array of Floats that need to be converted to a byte array and back to a float[]... can anyone help me do this correctly?

I'm working with the bitConverter class and found myself stuck trying to append the results.

The reason I'm doing this is so I can save runtime values into a IO Stream. The target storage is Azure Page blobs in case that matters. I don't care about what endian this is stored in, as long as it input matches the output.

static  byte[] ConvertFloatToByteArray(float[] floats)
        {
            byte[] ret = new byte[floats.Length * 4];// a single float is 4 bytes/32 bits

            for (int i = 0; i < floats.Length; i++)
            {
               // todo: stuck...I need to append the results to an offset of ret
                ret = BitConverter.GetBytes(floats[i]);

            }
            return ret;
        }


 static  float[] ConvertByteArrayToFloat(byte[] bytes)
{ //to do }

解决方案

If you're looking for performance then you could use Buffer.BlockCopy. Nice and simple, and probably about as fast as you'll get in managed code.

var floatArray1 = new float[] { 123.45f, 123f, 45f, 1.2f, 34.5f };

// create a byte array and copy the floats into it...
var byteArray = new byte[floatArray1.Length * 4];
Buffer.BlockCopy(floatArray1, 0, byteArray, 0, byteArray.Length);

// create a second float array and copy the bytes into it...
var floatArray2 = new float[byteArray.Length / 4];
Buffer.BlockCopy(byteArray, 0, floatArray2, 0, byteArray.Length);

// do we have the same sequence of floats that we started with?
Console.WriteLine(floatArray1.SequenceEqual(floatArray2));    // True

这篇关于如何转换float数组以一个byte []和回？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！