Vb.net调用C写的Dll含结构体指针参数的方法

VC Dll

#define NAME_LEN_MAX64

typedef struct
{
  UINT uVendorID;     // 厂商ID
  char acVendorName[NAME_LEN_MAX];     // 厂商名称
  char acProductSeries[NAME_LEN_MAX];     // 产品系列
  char acProductName[NAME_LEN_MAX];     // 产品名称
  char acFriendlyName[NAME_LEN_MAX];     // 昵称,多个同类设备,后加端口号区分
  char acDevFileName[NAME_LEN_MAX];     // 驱动dll名称
  char acFileName[NAME_LEN_MAX];     // 内核驱动逻辑设备名
  char acFirmwareVersion[NAME_LEN_MAX];    // Firmware版本
  char acSensorType[NAME_LEN_MAX];     // sensor类型
  char acPortType[NAME_LEN_MAX];     // 接口类型
} tDSCameraDevInfo;

CameraGetDevList(tDSCameraDevInfo *pDSCameraList, INT *piNums);

在Vb.net中使用

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential)> _ Public Structure tDSCameraDevInfo Dim iVendorID As Integer ' 厂商ID <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acVendorName() As Byte '厂商名称 <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acProductSeries() As Byte ' 产品系列 <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acProductName() As Byte '产品名称 <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acFriendlyName() As Byte '昵称,多个同类设备,后加端口号区分 <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acDevFileName() As Byte '驱动dll名称 <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acFileName() As Byte '内核驱动逻辑设备名 <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acFirmwareVersion() As Byte 'Firmware版本 <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acSensorType() As Byte 'sensor类型 <MarshalAs(UnmanagedType.ByValArray, SizeConst:=64)> _ Dim acPortType() As Byte End Structure Public Declare Function GetDevList Lib "XXX.dll" (ByRef pDSCameraList As tDSCameraDevInfo, ByRef piNums As Integer) As emDSCameraStatus

调用时,

Dim m_asCamDevInfo(50) As tDSCameraDevInfo

Dim m_iNum As Integer

GetDevList(m_asCamDevInfo(0), m_iNum)

但是这样调用后,结构体中的每个成员都是Byte型的,因此还需要通过下面方法将它转换一下。

System.Text.UTF8Encoding.UTF8.GetString(m_asCamDevInfo(0).acProductName)

如此,完成调用。

posted @ 2012-09-29 09:05  Youf Leen  阅读(2187)  评论(0编辑  收藏  举报