public static void Ch7ModifyCh7PointerArray2()
{
//create objects to use
var value = new Ch7PointerArray();
int[] iValues = new int[] { 123, 123, 123, 123 };
Ch7StringAW[] ch7StringAWs = new Ch7StringAW[4];
for (int i = 0; i < ch7StringAWs.Length; i++)
{
ch7StringAWs[i] = new Ch7StringAW
{
asValue = "BBBB".ToArray(),
wsValue = "你你你你".ToArray(),
};
}
//alloc block memory from process heap
IntPtr ptrIValues = Marshal.AllocHGlobal(4 * 4);
IntPtr ptrCh7StringAW = Marshal.AllocHGlobal(4 * Marshal.SizeOf(typeof(Ch7StringAW)));
//cal each object address
for (int i = 0; i < 4; i++)
{
value.iValuePtrArray[i] = ptrIValues + i * 4;
value.pchStringAWPtrArray[i] = ptrCh7StringAW + i * Marshal.SizeOf(typeof(Ch7StringAW));
}
//copy managed object memory to native heap
for (int i = 0; i < 4; i++)
{
Marshal.StructureToPtr(iValues[i], value.iValuePtrArray[i], false);
Marshal.StructureToPtr(ch7StringAWs[i], value.pchStringAWPtrArray[i], false);
}
if (Ch7Native.Ch7ModifyCh7PointerArray(value))
{
for (int i = 0; i < 4; i++)
{
ch7StringAWs[i] = (Ch7StringAW)Marshal.PtrToStructure(value.pchStringAWPtrArray[i], typeof(Ch7StringAW));
iValues[i] = (int)Marshal.PtrToStructure(value.iValuePtrArray[i], typeof(int));
}
}
Marshal.FreeHGlobal(ptrIValues);
Marshal.FreeHGlobal(ptrCh7StringAW);
for (int i = 0; i < 4; i++)
{
value.iValuePtrArray[i] = IntPtr.Zero;
value.pchStringAWPtrArray[i] = IntPtr.Zero;
}
ptrCh7StringAW = IntPtr.Zero;
ptrCh7StringAW = IntPtr.Zero;
}
public static extern bool Ch7ModifyCh7PointerArray(Ch7PointerArray value);