C# 中的结构元帅
我在 C# 中有以下结构
unsafe public struct control
{
public int bSetComPort;
public int iComPortIndex;
public int iBaudRate;
public int iManufactoryID;
public byte btAddressOfCamera;
public int iCameraParam;
public byte PresetNum;
public byte PresetWaitTime;
public byte Group;
public byte AutoCruiseStatus;
public byte Channel;
public fixed byte Data[64];
}
，我用来将其转换为字节数组 [] 的函数是
static byte[] structtobyte(object obj)
{
int len = Marshal.SizeOf(obj);
byte[] arr = new byte[len];
IntPtr ptr = Marshal.AllocHGlobal(len);
Marshal.StructureToPtr(obj, ptr, true);
Marshal.Copy(ptr, arr, 0, len);
Marshal.FreeHGlobal(ptr);
return arr;
}
当我编译时，它给出了
Type 'System.Byte[]' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed.
问题是什么？ 提前致谢！
I have the following struct in C#
unsafe public struct control
{
public int bSetComPort;
public int iComPortIndex;
public int iBaudRate;
public int iManufactoryID;
public byte btAddressOfCamera;
public int iCameraParam;
public byte PresetNum;
public byte PresetWaitTime;
public byte Group;
public byte AutoCruiseStatus;
public byte Channel;
public fixed byte Data[64];
}
And the function i use to convert it to byte array[] is
static byte[] structtobyte(object obj)
{
int len = Marshal.SizeOf(obj);
byte[] arr = new byte[len];
IntPtr ptr = Marshal.AllocHGlobal(len);
Marshal.StructureToPtr(obj, ptr, true);
Marshal.Copy(ptr, arr, 0, len);
Marshal.FreeHGlobal(ptr);
return arr;
}
When i compile it gives
Type 'System.Byte[]' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed.
What can be the problem?
Thanks in advance!
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SizeOf不适用于数组。请改用 array.Length * Marshal.SizeOf(elementType) 。SizeOfdoesn't work on arrays. Usearray.Length * Marshal.SizeOf(elementType)instead.您报告为编译错误的错误实际上是运行时错误（
ArgumentException）。当您想使用structtobyte将control转换为byte[]时，您应该向该方法传递对control的引用>，不是byte数组 (byte[])。The error you are reporting as a compile error is in fact a runtime error (an
ArgumentException). When you want to usestructtobyteto convert acontroltobyte[]you should pass the method a reference tocontrol, not abytearray (byte[]).