[英]C# convert object[ ] into byte[ ], but how to keep byte object as byte?
I am using Convert an array of different value types to a byte array solution for my objects to byte array conversion. 我正在使用将不同值类型的数组转换为字节数组解决方案,以便我的对象进行字节数组转换。
But I have a small issue that causes a big problem. 但我有一个小问题,导致一个大问题。
There are "byte" type of data in mids of object[], I don't know how to keep "byte" as is. 在object []的mids中有“byte”类型的数据,我不知道如何保持“byte”。 I need keep same bytes-length before and after.
我需要在之前和之后保持相同的字节长度。
I tried add "byte" type into the dictionary like this: 我尝试将“byte”类型添加到字典中,如下所示:
private static readonlyDictionary<Type, Func<object, byte[]>> Converters =
new Dictionary<Type, Func<object, byte[]>>()
{
{ typeof(byte), o => BitConverter.GetBytes((byte) o) },
{ typeof(int), o => BitConverter.GetBytes((int) o) },
{ typeof(UInt16), o => BitConverter.GetBytes((UInt16) o) },
...
};
public static void ToBytes(object[] data, byte[] buffer)
{
int offset = 0;
foreach (object obj in data)
{
if (obj == null)
{
// Or do whatever you want
throw new ArgumentException("Unable to convert null values");
}
Func<object, byte[]> converter;
if (!Converters.TryGetValue(obj.GetType(), out converter))
{
throw new ArgumentException("No converter for " + obj.GetType());
}
byte[] obytes = converter(obj);
Buffer.BlockCopy(obytes, 0, buffer, offset, obytes.Length);
offset += obytes.Length;
}
}
there is no syntext complaining, but I traced this code, after the program executed 没有syntext抱怨,但我在程序执行后跟踪了这段代码
byte[] obytes = converter(obj);
the original "byte" becomes byte[2]. 原始的“字节”变为字节[2]。
What happens here? 这里发生了什么? How to keep byte value authentic in this solution?
如何在此解决方案中保持字节值可靠?
Thanks! 谢谢!
There is no BitConverter.GetBytes
overload that takes a byte
, so your code: 没有
BitConverter.GetBytes
重载需要一个byte
,所以你的代码:
BitConverter.GetBytes((byte) o)
Is being implicitly expanded into the nearest match: BitConverter.GetBytes(short)
( Int16
), resulting in two bytes. 被隐式扩展为最接近的匹配:
BitConverter.GetBytes(short)
( Int16
),产生两个字节。 All you need to do is return a single-element byte array, eg like this: 您需要做的就是返回单元素字节数组,例如:
{ typeof(byte), o => new[] { (byte) o } }
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