与Berkeley DB混合使用C ++ / CLI代码

/clr

// DB_test1.cpp : main project file.

#include \"stdafx.h\"
#pragma comment(lib,\"libdb51\")
using namespace System;
using namespace System::Runtime::InteropServices;

int main(array<System::String ^> ^args)
{
    Db SigDb(0,0);
    unsigned int oFlags= DB_CREATE;
    SigDb.open(NULL,\"SigDb.db\",0,DB_BTREE,oFlags,0);
    String^ HexSig=\"D8B1048900ABFF8B\";
    wchar_t* a=( wchar_t* )Marshal::StringToHGlobalUni(HexSig).ToPointer() ;
    wchar_t* A=( wchar_t* )Marshal::StringToHGlobalUni(HexSig).ToPointer();;

    Dbt key1(&a,100);
    Dbt data1(&A,100);

    Marshal::FreeHGlobal(IntPtr(A));
    int ret= SigDb.put(NULL,&key1,&data1, DB_NOOVERWRITE);
    if(ret==DB_KEYEXIST){
        Console::WriteLine(\"You are trying to insert an exist key!\");
    }


    wchar_t DDData[200];
    Dbt getKey, getData;
    getKey.set_data(&a);

    getKey.set_size(100);
    getData.set_data(DDData);
    getData.set_ulen(200);
    getData.set_flags(DB_DBT_USERMEM);
    Marshal::FreeHGlobal(IntPtr(a));
    if(SigDb.get(NULL,&getKey,&getData,0)==DB_NOTFOUND)
        Console::WriteLine(\"Not Found !\");
    else
        Console::WriteLine(\" {0}\",Marshal::PtrToStringUni((IntPtr)DDData));


    return 0;
}

String^ HexSig=\"D8B1048900ABFF8B\";

SigDb.db

Console::WriteLine(\"Not Found !\");