c# 如何将十六进制四个字节的byte[]转成四个字节的float 型

Question

char c[4]
c[0]=124
c[1]=111
c[2]=78
c[3]=223

float   f;
如何将c[4]表示的4字节内容转换成float放入 f中

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Answer 1

没有看懂你的意思——你转换规律是什么？最好举一个例子，谢谢。

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Answer 2

你可以看看这个示例的：http://code.msdn.microsoft.com/CSHexStringByteArrayConvert-a80e955d

上面的示例演示了把16进制转化为字符串，你可以参考上面的代码来实现你的需求，主要区别是对16进制的解析不一样

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Answer 3

具体实现代码可以参考下面的文章来实现：

http://www.csharpwin.com/csharpspace/6229r367.shtml

http://www.360doc.com/content/11/1103/22/3810344_161489474.shtml

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Answer 4

标准C的程序 ：
float string_tofloar(unsigned char c[8])
{
union{unsigned char car[4];
      float r;}temp;

temp.car[0]=(c[1]-0x30)*16+c[0];
temp.car[1]=(c[3]-0x30)*16+c[2];
temp.car[2]=(c[5]-0x30)*16+c[4];
temp.car[3]=(c[7]-0x30)*16+c[6];
return temp.r;
}
这个程序是示意程序，没有去编译，在参数传递上有可能有问题，可能要用指针，但思路是这样。

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Answer 5

如果要做成c#应该怎么办？

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我要飞得更远!

Answer 6

标准C的程序 ：
float string_tofloar(unsigned char c[8])
{
union{unsigned char car[4];
      float r;}temp;

temp.car[0]=(c[1]-0x30)*16+c[0];
temp.car[1]=(c[3]-0x30)*16+c[2];
temp.car[2]=(c[5]-0x30)*16+c[4];
temp.car[3]=(c[7]-0x30)*16+c[6];
return temp.r;
}
这个程序是示意程序，没有去编译，在参数传递上有可能有问题，可能要用指针，但思路是这样，不知道如何转成c#

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Answer 7

我提供的链接是用C3实现的了，具体你可以去链接地址看看，然后自己测试下

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Answer 8

那个连接？

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Answer 9

那个连接？

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具体实现代码可以参考下面的文章来实现：

http://www.csharpwin.com/csharpspace/6229r367.shtml

http://www.360doc.com/content/11/1103/22/3810344_161489474.shtml

---

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Answer 10

BitConverter.ToSingle

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Visual C++ MVP

Answer 11

值出来不正常

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Answer 12

尝试用C++封装成类库函数，然后C#中DllImport调用。

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Answer 13

 可以尝试下谢啦

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Answer 14

hello,

你是要用byte[]转吗，但你的发问内容是用char，你可参考以下的做法

BitConverter.ToSingle
BitConverter.Int64BitsToDouble

http://www.dotblogs.com.tw/yc421206/archive/2013/04/03/99840.aspx

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