问题描述
为什么C＃Marshal.Copy程序没有任何过载从非托管内存指针复制到16位管理无符号整数数组
Why does C# Marshal.Copy routine does not have any overload for copying from unmanaged memory pointer to 16 bit managed unsigned integer array?
例如：
Copy(IntPtr, Byte[], Int32, Int32) Copies data from an unmanaged memory pointer to a managed 8-bit unsigned integer array.
Copy(IntPtr, Char[], Int32, Int32) Copies data from an unmanaged memory pointer to a managed character array.
Copy(IntPtr, Double[], Int32, Int32) Copies data from an unmanaged memory pointer to a managed double-precision floating-point number array.
Copy(IntPtr, Int16[], Int32, Int32) Copies data from an unmanaged memory pointer to a managed 16-bit signed integer array.
Copy(IntPtr, Int32[], Int32, Int32) Copies data from an unmanaged memory pointer to a managed 32-bit signed integer array.
Copy(IntPtr, Int64[], Int32, Int32) Copies data from an unmanaged memory pointer to a managed 64-bit signed integer array.
Copy(IntPtr, IntPtr[], Int32, Int32) Copies data from an unmanaged memory pointer to a managed IntPtr array.
Copy(IntPtr, Single[], Int32, Int32). Copies data from an unmanaged memory pointer to a managed single-precision floating-point number array.
如果没有编组的选择，我怎么复制非托管USHORT阵列管理USHORT阵列？
If there is no marshalling alternative, how do I copy unmanaged ushort array to managed ushort array?
推荐答案
我觉得 元帅没有一个复制（IntPtr的，UINT16 []，的Int32，Int32）将，因为CLS遵从性（CLS遵从的信条超载是无符号整数运算不暴露给消费者，我不同意这一规则FWIW）。
I think Marshal doesn't have a Copy(IntPtr, UInt16[], Int32, Int32) overload because of CLS compliance (a tenet of CLS compliance is that unsigned integer operations are not exposed to consumers, I disagree with this rule FWIW).
通过编组，所有重要的是该元素的大小。签名岬只是一个次要问题。我要么使用字节或的Int16 过载和做自己的铸造之后，或者我会使用不安全的指针。
With marshalling, all that matters is the size of the elements. Signed-ness is just a secondary concern. I would either use the Byte or Int16 overloads and do my own casting afterwards, or I would use unsafe pointers.
IntPtr unmanagedArray = ...
Int16[] destination0 = new Int16[ count ];
Marshal.Copy( unmanagedArray, destination0, 0, count );
UInt16[] destinion1 = destination0.OfType<UInt16>().ToArray(); // Linq extension method
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