我有一個本地結構,(這是非常大的,所以我不得不使用新的關鍵字來實例化,下面只是爲了使一個MCVE我不能改變結構因爲它被提供爲外部依賴性),StructureToPtr沒有複製原生結構中的原始類型字段到ref結構正確
struct NativeStruct
{
char BrokerID[11];
char InvestorID[13];
char InstrumentID[31];
char OrderRef[13];
char UserID[16];
char OrderPriceType;
char Direction;
double LimitPrice;
}
欲NativeStruct轉換爲管理對象,所以所定義的REF結構鏡像它,這也使用兩種枚舉如下,
public enum struct EnumOrderPriceTypeType
{
AnyPrice = (Byte)'1',
LimitPrice = (Byte)'2',
BestPrice = (Byte)'3',
LastPrice = (Byte)'4',
LastPricePlusOneTicks = (Byte)'5',
LastPricePlusTwoTicks = (Byte)'6',
LastPricePlusThreeTicks = (Byte)'7',
AskPrice1 = (Byte)'8',
AskPrice1PlusOneTicks = (Byte)'9',
AskPrice1PlusTwoTicks = (Byte)'A',
AskPrice1PlusThreeTicks = (Byte)'B',
BidPrice1 = (Byte)'C',
BidPrice1PlusOneTicks = (Byte)'D',
BidPrice1PlusTwoTicks = (Byte)'E',
BidPrice1PlusThreeTicks = (Byte)'F'
};
public enum struct EnumDirectionType
{
Buy = (Byte)'0',
Sell = (Byte)'1'
};
[StructLayout(LayoutKind::Sequential)]
public ref struct ManagedStruct
{
[MarshalAs(UnmanagedType::ByValTStr, SizeConst = 11)]
String^ BrokerID;
[MarshalAs(UnmanagedType::ByValTStr, SizeConst = 13)]
String^ InvestorID;
[MarshalAs(UnmanagedType::ByValTStr, SizeConst = 31)]
String^ InstrumentID;
[MarshalAs(UnmanagedType::ByValTStr, SizeConst = 13)]
String^ OrderRef;
[MarshalAs(UnmanagedType::ByValTStr, SizeConst = 16)]
String^ UserID;
EnumOrderPriceTypeType OrderPriceType;
EnumDirectionType Direction;
double LimitPrice;
};
然後我使用StructureToPtr
將本地對象複製到託管對象,並使用WriteLine
測試是否複製成功,
NativeStruct *native = new NativeStruct();
ManagedStruct^ managed = gcnew ManagedStruct();
managed->LimitPrice = 95.5;
managed->BrokerID = "666666";
Marshal::StructureToPtr(managed, IntPtr(native), false);
int i;
for (i = 0; i < 11; i++)
Console::Write(native->BrokerID[i]);
Console::WriteLine();
Console::WriteLine(native->LimitPrice);
Console::WriteLine(L"Hello ");
Console::ReadLine();
我的問題是,爲什麼LimitPrice
不successfuly複製?我一直在爭取一週,任何幫助都會受到歡迎。非常感謝。
你真的是一個救星!謝謝。我已經學會了調試技巧。 – tesla1060