58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
#include"CourseDAO.h"
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void addCourse(_ConnectionPtr connection, Course course) {
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string sql = "insert into course values('" + course.getId() + "'," +
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"'" + course.getName() + "')";
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connection->Execute(sql.c_str(), NULL, (long)0);
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}
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void deleteCourse(_ConnectionPtr connection, string id) {
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string sql = "delete from course where id = '" + id + "'";
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connection->Execute(sql.c_str(), NULL, (long)0);
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}
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void updateCourseName(_ConnectionPtr connection, string id, string name) {
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string sql = "update course set name = '" + name + "\' where id = \'" + id + "'";
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connection->Execute(sql.c_str(), NULL, (long)0);
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}
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Course* getCourseById(_ConnectionPtr connection, string id) {
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string sql = "select * from course where id = '" + id + "'";
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_RecordsetPtr record = connection->Execute(sql.c_str(), NULL, (long)0);
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if (record->BOF == -1) return NULL;//记录集为空
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Course* course = new Course();
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course->setId((char*)(_bstr_t)record->Fields->GetItem("id")->Value);
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course->setName((char*)(_bstr_t)record->Fields->GetItem("name")->Value);
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return course;
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}
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Course* getCourseByName(_ConnectionPtr connection, string name) {
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string sql = "select * from course where name = '" + name + "'";
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_RecordsetPtr record = connection->Execute(sql.c_str(), NULL, (long)0);
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if (record->BOF == -1) return NULL;//记录集为空
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Course* course = new Course();
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course->setId((char*)(_bstr_t)record->Fields->GetItem("id")->Value);
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course->setName((char*)(_bstr_t)record->Fields->GetItem("name")->Value);
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return course;
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}
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std::vector<Course>* getAllCourse(_ConnectionPtr connection) {
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string sql = "select * from course";
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_RecordsetPtr record = connection->Execute(sql.c_str(), NULL, (long)0);
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if (record->BOF == -1) return NULL;//记录集为空
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std::vector<Course>* v = new std::vector<Course>();
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Course* course;
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for (; !record->EndOfFile; record->MoveNext()) {
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course = new Course();
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course->setId((char*)(_bstr_t)record->Fields->GetItem("id")->Value);
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course->setName((char*)(_bstr_t)record->Fields->GetItem("name")->Value);
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v->push_back(*course);
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}
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return v;
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} |