C# byte[] 如何转换成byte*

目标:将byte\[\]转成byte*以方便使用memcpy

DllImport("kernel32.dll", EntryPoint = "RtlCopyMemory", CharSet = CharSet.Ansi)

public extern static long CopyMemory(IntPtr dest, IntPtr source, int size);

private void butTemp_Click(object sender, EventArgs e)

{

unsafe

{

byte\[\] by1 = new byte4 { 1, 2, 3,4 };

IntPtr tempMemoryPointer = Marshal.AllocHGlobal(4);

fixed (byte* converted = by1)

{

CopyMemory(tempMemoryPointer, new IntPtr(converted), 4);

}

byte* p1 = (byte*)tempMemoryPointer.ToPointer();

//此时p0到p3分别为: 1 2 3 4

}

}

扩展目标：取int的地址以使用memcpy

private void butTemp_Click(object sender, EventArgs e)

{

unsafe

{

int iTmp = 0x11223344;

IntPtr tempMemoryPointer = Marshal.AllocHGlobal(4);

int* converted = &iTmp;

CopyMemory(tempMemoryPointer, new IntPtr(converted), 4);

byte* p1 = (byte*)tempMemoryPointer.ToPointer();

//此时p0到p3分别为: 0x44 0x33 0x22 0x11

}

}

测试环境

win7 + VS2022