NX二次开发-NX访问MySQL数据库(增删改查)

版本：NX11+VS2013+MySQL5.6(x64)+SQLyog

1.新建一个NX项目(多字节)

2.设置VC++目录(调用MySQL的头文件，dll和lib库文件)

3.设置番茄助手

然后重启VS

3.源代码(发布：程序运行时需要libmysql.dll，此DLL要随程序一同发布)

 //DataBaseTest

 // Mandatory UF Includes
 #include <uf.h>
 #include <uf_object_types.h>

 // Internal Includes
 #include <NXOpen/ListingWindow.hxx>
 #include <NXOpen/NXMessageBox.hxx>
 #include <NXOpen/UI.hxx>

 // Internal+External Includes
 #include <NXOpen/Annotations.hxx>
 #include <NXOpen/Assemblies_Component.hxx>
 #include <NXOpen/Assemblies_ComponentAssembly.hxx>
 #include <NXOpen/Body.hxx>
 #include <NXOpen/BodyCollection.hxx>
 #include <NXOpen/Face.hxx>
 #include <NXOpen/Line.hxx>
 #include <NXOpen/NXException.hxx>
 #include <NXOpen/NXObject.hxx>
 #include <NXOpen/Part.hxx>
 #include <NXOpen/PartCollection.hxx>
 #include <NXOpen/Session.hxx>

 #include <uf.h>
 #include <uf_ui.h>

 //头文件
 #include <stdio.h>
 #include <stdlib.h>
 //MySQL support on Windows
 #include <WinSock2.h>
 #include <mysql.h>
 #pragma comment(lib,"libmysql")

 // Std C++ Includes
 #include <iostream>
 #include <sstream>

 using namespace NXOpen;
 using std::string;
 using std::exception;
 using std::stringstream;
 using std::endl;
 using std::cout;
 using std::cerr;

 //------------------------------------------------------------------------------
 // NXOpen c++ test class
 //------------------------------------------------------------------------------
 class MyClass
 {
     // class members
 public:
     static Session *theSession;
     static UI *theUI;

     MyClass();
     ~MyClass();

     void do_it();
     void print(const NXString &);
     void print(const string &);
     void print(const char*);

 private:
     Part *workPart, *displayPart;
     NXMessageBox *mb;
     ListingWindow *lw;
     LogFile *lf;
 };

 //------------------------------------------------------------------------------
 // Initialize static variables
 //------------------------------------------------------------------------------
 Session *(MyClass::theSession) = NULL;
 UI *(MyClass::theUI) = NULL;

 //------------------------------------------------------------------------------
 // Constructor
 //------------------------------------------------------------------------------
 MyClass::MyClass()
 {

     // Initialize the NX Open C++ API environment
     MyClass::theSession = NXOpen::Session::GetSession();
     MyClass::theUI = UI::GetUI();
     mb = theUI->NXMessageBox();
     lw = theSession->ListingWindow();
     lf = theSession->LogFile();

     workPart = theSession->Parts()->Work();
     displayPart = theSession->Parts()->Display();

 }

 //------------------------------------------------------------------------------
 // Destructor
 //------------------------------------------------------------------------------
 MyClass::~MyClass()
 {
 }

 //------------------------------------------------------------------------------
 // Print string to listing window or stdout
 //------------------------------------------------------------------------------
 void MyClass::print(const NXString &msg)
 {
     if(! lw->IsOpen() ) lw->Open();
     lw->WriteLine(msg);
 }
 void MyClass::print(const string &msg)
 {
     if(! lw->IsOpen() ) lw->Open();
     lw->WriteLine(msg);
 }
 void MyClass::print(const char * msg)
 {
     if(! lw->IsOpen() ) lw->Open();
     lw->WriteLine(msg);
 }

 //------------------------------------------------------------------------------
 // 定义结构体
 //------------------------------------------------------------------------------
 struct Student
 {
     int id;
     char name[];
     char birthday[];
     char cellphone[];
 };

 //------------------------------------------------------------------------------
 // 接收界面输入参数，增加一条数据
 //------------------------------------------------------------------------------
 int do_insert(Student* stu)
 {
     MYSQL conn;
     mysql_init(&conn);

     // 连接服务器
     if (NULL == mysql_real_connect(&conn,
         "127.0.0.1", "root", "", "example"
         , , NULL, ))
     {
         printf("Failed to connect to database:  %s\n",
             mysql_error(&conn));
         return -;
     }

     // 构造SQL语句
     char sql[];
     sprintf(sql,
         "   INSERT INTO `student` "
         "       (`id`, `name`, `birthday`, `cellphone`)    "
         "        VALUES   "
         "('%d', '%s', '%s', '%s')"
         , stu->id
         , stu->name
         , stu->birthday
         , stu->cellphone
         );

     // 执行SQL语句
     int ret = mysql_query(&conn, sql);
     if (ret != )
     {
         printf("error: %s \n", mysql_error(&conn));
     }
     else
     {
         my_ulonglong affected_rows = mysql_affected_rows(&conn); // a 64-bit large number
         printf("%d rows affected. \n", (int)affected_rows); // cast to int
     }

     // 关闭连接
     mysql_close(&conn);

     return ;
 }

 //------------------------------------------------------------------------------
 // 增加一条数据
 //------------------------------------------------------------------------------
 int my_insert(MYSQL* conn)
 {
     //SQL语句的末尾不要加分号
     const char* sql =
         "   INSERT INTO `student` "
         "       (`id`, `name`, `birthday`, `cellphone`)    "
         "        VALUES   "
         "('17', 'qian22', '1992-12-2', '18601088987')"
         ;

     int ret = mysql_query(conn, sql);//执行SQL语句
     char msg[];
     if (ret != )
     {
         sprintf_s(msg, "error: %s\n", conn, sql);
         uc1601(msg, );
         return -;
     }
     my_ulonglong affected_rows = mysql_affected_rows(conn);//获得受影响的行数
     sprintf_s(msg, "%d rows affected\n", (int)affected_rows);
     uc1601(msg, );

     return ;
 }

 //------------------------------------------------------------------------------
 // 查找数据
 //------------------------------------------------------------------------------
 int my_select(MYSQL* conn)
 {
     // SQL语句，末尾不加分号。每次只执行一条SQL语句。
     const char* sql = "SELECT * FROM student";
     int ret = mysql_query(conn, sql);
     char msg[];
     UF_UI_open_listing_window();
     if (ret != )
     {
         sprintf_s(msg,"error: %s \n", mysql_error(conn));
         uc1601(msg, );
         return -;
     }

     MYSQL_RES * result = mysql_store_result(conn);
     if (result == NULL)
     {
         //printf("error(%d): %s \n", mysql_errno(conn), mysql_error(conn));
     }
     else
     {
         // how many rows
         my_ulonglong num_rows = mysql_num_rows(result);
         sprintf_s(msg,"got %d rows: \n", (int)num_rows);
         UF_UI_write_listing_window(msg);

         // number of fields for each row
         unsigned int num_fields = mysql_num_fields(result);
         sprintf_s(msg,"number of fields: %d \n", (int)num_fields);
         UF_UI_write_listing_window(msg);

         // fetch the rows
         MYSQL_ROW row;
         while ((row = mysql_fetch_row(result)))
         {
             unsigned long *lengths = mysql_fetch_lengths(result);
             for (int i = ; i < num_fields; i++)
             {
                 char* field = row[i]; // can be a NULL value
                 unsigned int field_length = lengths[i]; // the data length

                 sprintf_s(msg,"     column[%d], length[%d] , data[%s] \n",
                     i, field_length, field ? field : "null");
                 UF_UI_write_listing_window(msg);
             }
             UF_UI_write_listing_window("\n");
         }

         // release the memory
         mysql_free_result(result);
     }

     return ;
 }

 //------------------------------------------------------------------------------
 // Do something
 //------------------------------------------------------------------------------
 void MyClass::do_it()
 {

     // TODO: add your code here

 /*
     //获取用户输入
     Student stu;
     printf("ID:");
     char buf[128];
     gets(buf);
     stu.id = atoi(buf);
     printf("Name:");
     gets(stu.name);
     printf("Birthday:");
     gets(stu.birthday);
     printf("CellPhone:");
     gets(stu.cellphone);
 */

     if (mysql_library_init(, NULL, NULL))//初始化
     {
         uc1601("could not initialize MySQL library\n", );
         return;
     }
     //连接服务器
     MYSQL conn;
     mysql_init(&conn);

     MYSQL* ret = mysql_real_connect(&conn, "127.0.0.1", "root", "", "example", , NULL, );
     if (!ret)
     {
         char msg[];
         sprintf_s(msg, "Failed to connect to database: %s\n", mysql_error(&conn));
         uc1601(msg, );
     }

     //增加一条数据
     my_insert(&conn);

     //查找数据
     my_select(&conn);

     //关闭连接
     mysql_close(&conn);

     mysql_library_end();//结束
 }

 //------------------------------------------------------------------------------
 // Entry point(s) for unmanaged internal NXOpen C/C++ programs
 //------------------------------------------------------------------------------
 //  Explicit Execution
 extern "C" DllExport void ufusr( char *parm, int *returnCode, int rlen )
 {
     try
     {
         // Create NXOpen C++ class instance
         MyClass *theMyClass;
         theMyClass = new MyClass();
         theMyClass->do_it();
         delete theMyClass;
     }
     catch (const NXException& e1)
     {
         UI::GetUI()->NXMessageBox()->Show("NXException", NXOpen::NXMessageBox::DialogTypeError, e1.Message());
     }
     catch (const exception& e2)
     {
         UI::GetUI()->NXMessageBox()->Show("Exception", NXOpen::NXMessageBox::DialogTypeError, e2.what());
     }
     catch (...)
     {
         UI::GetUI()->NXMessageBox()->Show("Exception", NXOpen::NXMessageBox::DialogTypeError, "Unknown Exception.");
     }
 }

 //------------------------------------------------------------------------------
 // Unload Handler
 //------------------------------------------------------------------------------
 extern "C" DllExport int ufusr_ask_unload()
 {
     return (int)NXOpen::Session::LibraryUnloadOptionImmediately;
 }

 Caesar卢尚宇
 2020年2月12日

4.补充(出自https://chuanke.baidu.com/v4509752-209102-1284621.html C语言C++学习指南（数据库篇）MySQL与SQLite)

学习资料 https://chuanke.baidu.com/v4509752-209102-1284621.html C语言C++学习指南（数据库篇）MySQL与SQLite

MySQL https://www.mysql.com/

MySQL :: MySQL 5.6 Reference Manual :: 23.7.5 C API Function Overview https://dev.mysql.com/doc/refman/5.6/en/c-api-function-overview.html

补充

数据库不能写入中文，设置数据库字符集，// "gbk" or "utf8"

位置加到mysql_init之后，mysql_real_connect之前。

        // "gbk" or "utf8"
        if (!mysql_set_character_set(&conn, "gbk"))
        {
            char msg[];
            sprintf_s(msg, "Charset for the connection : %s\n", mysql_character_set_name(&conn));
            //uc1601(msg, 1);
        }

2020年4月27日

Caesar卢尚宇