仅使用参考指针查找对象数组的总大小?

如何解决仅使用参考指针查找对象数组的总大小?

| 因此,作为概述,我正在使用Wlanapi,并且对它还比较陌生(通常是本地api)。我遇到了将结构从c ++转换为c#的问题。现在我有: 原版的:
typedef struct _WLAN_BSS_LIST {
    DWORD          dwTotalSize;
    DWORD          dwNumberOfItems;
    WLAN_BSS_ENTRY wlanBssEntries[1];
} WLAN_BSS_LIST,*PWLAN_BSS_LIST;
转换:
[StructLayout(LayoutKind.Sequential,CharSet = CharSet.Unicode)]
struct WLAN_BSS_LIST 
{
    internal uint             dwTotalSize;
    internal uint             dwNumberOfItems;
    internal WLAN_BSS_ENTRY[] wlanBssEntries;

    internal WLAN_BSS_LIST(IntPtr ppBssList)
    {
        dwNumberOfItems = (uint)Marshal.ReadInt32(ppBssList);
        //I need to set the value of dwTotalSize but I dunno how
        wlanBssEntries = new WLAN_BSS_ENTRY[dwNumberOfItems];

        for (int i = 0; i < dwNumberOfItems; i++)
        {
            IntPtr pWlanBssEntry = new IntPtr(ppBssList.ToInt32() + i * 
                Marshal.SizeOf(typeof(WLAN_BSS_ENTRY)) + 8);
            wlanBssEntries[i] = (WLAN_BSS_ENTRY)Marshal.
                                    PtrToStructure(pWlanBssEntry,typeof(WLAN_BSS_ENTRY));
        }
    }
}
我只是不知道如何获得
ppBssList
引用的数组的总大小:( 仅供参考,如果有人将我指向现有图书馆,我将非常失望。 编辑以添加原始结构     

解决方法

        我不确定您的twTotalSize是否反映为wlanBssEntries中的条目分配的内存量,如果是这样,那么简单的计算就足够了,
 sizeof(typeof(WLAN_BSS_ENTRY)) * dwNumberOfItems + 8
否则,我建议您发布原始的本机数据结构,也许有更好的选择将其从内存块中编组。     ,        所以我想通了,我不知道我在想什么...
[StructLayout(LayoutKind.Sequential,Pack=1)]
struct WLAN_BSS_LIST
{
    internal uint dwTotalSize;
    internal uint dwNumberOfItems;
    internal WLAN_BSS_ENTRY[] wlanBssEntries;

    internal WLAN_BSS_LIST(IntPtr ppBssList)
    {
        dwTotalSize = (uint)Marshal.ReadInt32(ppBssList);
        dwNumberOfItems = (uint)Marshal.ReadInt32(ppBssList,4);
        wlanBssEntries = new WLAN_BSS_ENTRY[dwNumberOfItems];
        for (int i = 0; i < dwNumberOfItems; i++)
        {
            IntPtr pWlanBssEntry = new IntPtr(ppBssList.ToInt32() + i * 
                Marshal.SizeOf(typeof(WLAN_BSS_ENTRY)) + 8);
            wlanBssEntries[i] = (WLAN_BSS_ENTRY)Marshal.
                PtrToStructure(pWlanBssEntry,typeof(WLAN_BSS_ENTRY));
        }
    }
}
[StructLayout(LayoutKind.Sequential)]
public struct WLAN_BSS_ENTRY
{
    public DOT11_SSID dot11Ssid;
    public uint uPhyId;
    [MarshalAs(UnmanagedType.ByValArray,SizeConst = 6)]
    public byte[] dot11Bssid;
    public DOT11_BSS_TYPE dot11BssType;
    public DOT11_PHY_TYPE dot11BssPhyType;
    public int lRssi;
    public uint uLinkQuality;
    public bool bInRegDomain;
    public UInt16 usBeaconPeriod;
    public UInt64 ullTimestamp;
    public UInt64 ullHostTimestamp;
    public UInt16 usCapabilityInformation;
    public uint ulChCenterFrequency;
    public WLAN_RATE_SET wlanRateSet;
    public uint ulIeOffset;
    public uint ulIeSize;
}
    

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