C＃是否有一种将双数组转换为类似于C ++ cast.to char *的字符串的方法？ [英] Does C# have a way of casting a double array to a string similar to the C++ cast.to a char*?

问题描述

我继承了将双数组转换为char *的C ++代码，如下所示。在C＃中，我无法从与C ++强制转换生成的字符串匹配的双精度数组中生成字符串。在C＃中，是否有某种方法可以从双数组中生成一个字符串，该字符串与C ++中创建的字符串相匹配，在该字符串中完成了对char *的简单转换？演员的结果似乎是某种二进制数据。



C ++代码：

I have inherited C++ code that casts a double array to a char* as shown below. In C#, I have not been able to generate a string from an array of doubles that matches the string generated by the C++ cast. In C#, is there someway to generate a string from a double array that would match the string created in C++ where a simple cast to char* is done? The result of the cast appears to be some kind of binary data.

C++ code:

char* s = (char*) Darray

其中Darray是一系列双打



我尝试过：



在C＃中，我显然无法执行以下操作：

where Darray is an array of doubles

What I have tried:

In C#, I obviously can't do the following:

string theString = (string) Darray

在C＃中，我尝试了下面的失败：

In C#, I've tried the following unsuccessfully:

int length = Darray.Length * sizeof(double);
IntPtr pnt = Marshal.AllocHGlobal(length );
Marshal.Copy(Darray, 0, pnt, Darray.Length);
byte[] Barray = new byte[length];
Marshal.Copy(pnt, Barray, 0, length);
string theString = BitConverter.ToString(Barray);

我也尝试过这个失败：

I've also tried this unsuccessfully:

BinaryFormatter formatter = new BinaryFormatter();
using (MemoryStream m = new MemoryStream())
{
    formatter.Serialize(m, Darray);
    m.Position = 0;
    StreamReader sr = new StreamReader(m);
    string theString = sr.ReadToEnd();
}

我也尝试过这个失败：

I've also tried this unsuccessfully:

byte[] theBytesData = new byte[numBytesReqd];
Buffer.BlockCopy(Darray, 0, theBytesData, 0, numBytesReqd);
string theString = Encoding.ASCII.GetString(theBytesData, 0, theBytesData.Length);

也许没有解决这个问题的办法。我很感激任何想法。

Maybe there is no solution to this problem. I'd appreciate any thoughts.

推荐答案

在C＃中，每个对象都有一个ToString方法，通常应该做一个创建字符串的智能工作。你也有Convert.ToXXX方法强制进行强制转换，并且强制转换也可以工作。



但是看起来你正在尝试使用C＃，好像它是C ++一样。看起来一样，但事实并非如此。如果你正在使用指针，你很可能使用C＃错误。



如果我有一个双数组变成一个字符串，我想我使用stringbuilder和foreach迭代双打并一次添加一个。在阵列级别没有办法做到这一点。即使在C ++中，你也会获得数字的ASCII版本，而不是数字本身。在C＃中，如果这就是你想要的，你就可以了。

In C#, you have a ToString method on every object, which should generally do an intelligent job of creating a string. You also have Convert.ToXXX methods to force a cast, and casting also works.

But it looks like you're trying to use C# as if it was C++. It looks the same, but it's really not. If you're using pointers, odds are good you're using C# wrong.

If I had a double array to turn into a string, I'd imagine I'd use a stringbuilder, and a foreach to iterate over the doubles and add them one at a time. There's no way to do that at the array level. Even in C++, you'd be getting the ASCII versions of the numbers, not the numbers themselves. In C#, if that's what you want, you'd do

Convert.ToChar(xxx); 

每个双倍的
，一次一个，在你的数组中。当然，双倍超过255，所以我仍然困惑你要做的事情。

for each double, one at a time, in your array. Of course, a double goes beyond 255, so I'm still confused what you're trying to do.

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