字节数组，SetValue问题 [英] array of bytes, SetValue problem

问题描述

你好，
我在数组和字节类型方面遇到问题.

我有两个字节数组:

Hello,
I''m having a problem with array and Byte type.

I''ve got two arrays of bytes:

static Array^ samples = Array::CreateInstance(System::Byte::typeid,100);
static Array^ fake_samples = Array::CreateInstance(System::Byte::typeid,100);

然后是两个函数(方法?).
此代码将U2代码中的数字转换为整数.

Then two functions (methods?).
This one converts number in U2 code to integer.

System::Byte ConvertFromU2(System::Byte u2)
{
        System::Byte result;

	if ((u2 & 0x80) == 0 )		
	{
		result = 1.0 * u2; 
	} 
	else
	{
		u2 = u2 ^ 0xFF;
		u2 = u2 + 1;
		result = -1.0 * u2;
	}
	return result;
}

这个将一些数字放入"fake_samples"数组中，然后从"fake_samples"中获取数字并将它们存储在数组"sampes"中:

This one puts some numbers in an array ''fake_samples'', then takes numbers from an ''fake_samples'' and stores them in an array ''sampes'':

void CollectSamples(void)
{
	for (int i=25; i<100; i++)
	{
		fake_samples->SetValue(0x00, i);
	}

	for (int i=0; i<100; i++)
	{
	  System::Byte one_byte=(Convert::ToByte(fake_samples->GetValue(i)));
	  System::Byte converted_byte;
	  converted_byte = ConvertFromU2(one_byte);
	  samples->SetValue(converted_byte, i);
	}
}

由于有关此程序的某些未来计划，此操作以非常复杂的方式完成.
代码可以编译，但是在运行时，我在行中得到了一个异常:

This is done in such a complicated way due to some future plans concerning this program.
The code compiles, but when running I got an exception in line:

fake_samples->SetValue(0x00, i);

例外:
由于源类型不是原始类型，或者无法完成转换，因此无法从源类型扩展为目标类型.

我不知道该怎么办:(请帮忙！

Exception:
Cannot widen from source type to target type either because the source type is a not a primitive type or the conversion cannot be accomplished.

I don''t know what to do :( Please, help!

推荐答案

该值应隐式装在Object ^上，这样就可以了...也许你只需要一个演员...

The value should be implicitly boxed to an Object^ so that should be ok...maybe you just need a cast...

fake_samples->SetValue((Byte)0x00, i);

您真的需要使用SetValue吗?

Do you really need to use SetValue?

fake_samples[i] = (Byte)0x00;

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