异常求助.尝试读取或写入受保护的内存。这通常指示其他内存已损坏

yy2101 2009-11-12 12:05:38

关于C#调用C++的DLL时出现的问题

C++ code:



结构原型:

typedef struct ik_longshine_person_info_s

{

	

	int person_id;

	char person_name[128];         

	char employee_num[128];	

	int iris_enroll_flag; 	

         int sex;		

	char blood_type[20];

	char birthday[20];	

	char id_card[64];		

	char phone[64];		

	char address[256];		

	char zip_code[20];		

	char email_addr[128];	

}ik_longshine_person_info_t;



typedef struct ik_longshine_person_array_s

{

	int person_count;

	ik_longshine_person_info_t *persons;

}ik_longshine_person_array_t;



,// 输入参数 ik_longshine_person_info_t *pPerson , 输出参数 local_person, server_person中的persons指向的内存需要调用ik_as_free来释放

						

int STDCALL ik_as_sync_person (IK_LS_ATTEND_SERVER_HANDLE handle, ik_longshine_person_info_t *pPerson, int nPersonCount,ik_longshine_person_array_t *local_person,ik_longshine_person_array_t *server_person);

下边是我写的代码,大家帮忙看看错在哪里谢谢了



[DllImport("IKLongShine-2_0_0.dll")]

public extern unsafe static int ik_as_sync_person(IntPtr handle,ik_longshine_person_info_t[] pPerson,int nPersonCount,out ik_longshine_person_array_t local_person,out ik_longshine_person_array_t server_person);



    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

    public struct ik_longshine_person_info_t

    {              

        //必填项

        public int person_id;				                        

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]

        public string person_name;		                                    

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]

        public string employee_num;		                                       

        public int iris_enroll_flag;                                                  

        //选填项

        public int sex;				                                            

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]

        public string blood_type;	                                            

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]

        public string birthday;		                                            

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]

        public string id_card;		                                            

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]

        public string phone;			                                        

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]

        public string address;		                                            

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]

        public string zip_code;		                                            

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]

        public string email_addr;	                                             

   

    }



    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

    public struct ik_longshine_person_array_t

    {

        [MarshalAs(UnmanagedType.SafeArray)]

        public ik_longshine_person_info_t[] persons;     

        public int person_count;	                       

    }

private void btnTongbu_Click(object sender, EventArgs e)

        {

            

            ConnDB.Constr = readINI();

            ConnDB.Open();

            string ip = "127.0.0.1";

            IntPtr handle = ik_as_connect(ip, 9988, 1000);

            MessageBox.Show(handle.ToString());

            ik_longshine_person_info_t[] persons = new ik_longshine_person_info_t[1750];

            ik_longshine_person_array_t local;

            ik_longshine_person_array_t server;

            DataSet ds = new DataSet();

            ds = ConnDB.GetData("select irisID,name,serialNum from tb_emp_info");          

            DataTable dt = ds.Tables[0];

            int count = 0;

            for (int i = 0; i < dt.Rows.Count;i++ )

            {

                persons[i].person_id = Convert.ToInt32(dt.Rows[i]["irisID"]);

                persons[i].person_name = dt.Rows[i]["name"].ToString();

                persons[i].employee_num = dt.Rows[i]["serialNum"].ToString();

                persons[i].iris_enroll_flag = 0;

                count = i;

            }            

            int tongbuMsg = ik_as_sync_person(handle, persons, count, out local, out server);   //此处报异常

                         

            MessageBox.Show(tongbuMsg.ToString());

            ik_longshine_person_info_t[] localPerson = local.persons;

            int localCount = local.person_count;

            ik_longshine_person_info_t[] serverPerson = server.persons;

            int serverCount = server.person_count;

            int delMsg = ik_as_del_person(handle, serverPerson, serverCount);

            MessageBox.Show(delMsg.ToString());

            ik_as_close(handle);

            

        }

ik_as_connect为连接服务器函数,如果服务器没有连接正常就会出现这个异常,现在服务器没问题,返回的句柄也正确怎么还会出现异常呢

异常信息:
在 MainFrm.ik_as_sync_person(IntPtr handle, ik_longshine_person_info_t[] pPerson, Int32 nPersonCount, ik_longshine_person_array_t& local_person, ik_longshine_person_array_t& server_person)
在 MainFrm.btnTongbu_Click(Object sender, EventArgs e) 位置 MainFrm.cs:行号 534

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