才疏学浅，求助，C#调用C++ dll 返回结构体数组指针

[朽木小凡_24K高端黑]

//C++中定义：
struct GPS_TAXI_DATA
{
int id;
int equip_id;
double cross_x;
double cross_y;
string gps_date;
double speed;
int direct;
int status;
int acc;
string rece_date;
};


_declspec(dllimport) GPS_TAXI_DATA * get_gps_data(int year,int month,int day,int hour,int min,int sec,int &GPS_Arry_Num);

C#中：

[StructLayout(LayoutKind.Sequential)]
        public struct GPS_TAXI_DATA
        {
            [MarshalAs(UnmanagedType.I4)]
            int id;
            [MarshalAs(UnmanagedType.I4)]
            int equip_id;
            [MarshalAs(UnmanagedType.I8)]
            double cross_x;
            [MarshalAs(UnmanagedType.I8)]
            double cross_y;
            [MarshalAs(UnmanagedType.LPStr)]
            string gps_date;
            [MarshalAs(UnmanagedType.I8)]
            double speed;
            [MarshalAs(UnmanagedType.I4)]
            int direct;
            [MarshalAs(UnmanagedType.I4)]
            int status;
            [MarshalAs(UnmanagedType.I4)]
            int acc;
            [MarshalAs(UnmanagedType.LPStr)]
            string rece_date;
        };




        [DllImport(@"C:\Documents and Settings\jiangbinze\桌面\test\test.dll", EntryPoint = "get_gps_data")]
        public static extern GPS_TAXI_DATA[] get_gps_data(int year, int month, int day, int hour, int min, int sec, ref IntPtr GPS_Arry_Num);
public void test()
{
//这里该怎么写？
}

[bdmh]

GPS_TAXI_DATA data = get_gps_data(xxx,xxx,xxx,xxx)

[朽木小凡_24K高端黑]

引用 1 楼 bdmh 的回复:

GPS_TAXI_DATA data = get_gps_data(xxx,xxx,xxx,xxx)

um....版主 get_gps_data最后一项是一个引用类型 返回的是结构体数组的指针。。 这么写我已经试过了，报错“无法封送处理“return value”: 无效的托管/非托管类型组合。”

[朽木小凡_24K高端黑]

UP，求高人回答

[朽木小凡_24K高端黑]

问题解了。不能这么传。。。ref 传这种结构体才行

[wangzi1325]

这个试着恩么解决的呢？