C# 调用c++ 实例

c#的类如下：

public class RFIDBaseManage
{

[DllImport("xxx.dll")]
public static extern int Connect(string dev, ref int devid);

[DllImport("xxx.dll")]
public static extern int Disconnect(int devid);

[DllImport("xxx.dll", EntryPoint = "GetReaders")]
public static extern int GetReaders(ref ReaderItem item,int maxCount,ref int count);
}

public class RFIDInfoManage
{
[DllImport("xxx.dll", EntryPoint = "EPC1G2_Inventory")]
public static extern int EPC1G2_Inventory(int DeviceID, short antennalID, ref InventoryResult result);
}

[StructLayout(LayoutKind.Sequential)]
public struct ReaderItem
{

public int deviceID;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]
public string address;  //IP地址或串口；如"COM1"，"10.86.10.56"

public int status;
public int style;
}

[StructLayout(LayoutKind.Sequential)]
public struct InventoryResult
{
public int length;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2048)]
public byte[] tagData;      }