CMap使用方法总结

#include <array>

#ifdef _debug
#include <iostream>
#include <fstream>
using std::endl;
#endif

void cmfcapplication1dlg::onbnclickedok()
{
	// todo: 在此添加控件通知处理程序代码
#ifdef _debug
	std::ofstream  ofs("log.txt");
#endif
	
	// 使用setat()初始化
	typedef cmap<cstring, cstring, cstring, cstring> map_employee;
	map_employee map_employee;
	std::array<cstring, 3> employee_id{"100","108","120"};
	std::array<cstring, 3>employee_name{_t("shihuan"), _t("lipeng"), _t("tianjunhong")};
	for (auto i=0; i!=employee_id.size(); ++i)
	{
		map_employee.setat(employee_id[i], employee_name[i]);
	}
	
	// 使用pos遍历
	position pos = map_employee.getstartposition();
	while (pos)
	{
		cstring key = 0;
		cstring value;
		map_employee.getnextassoc(pos, key, value);
#ifdef _debug
		ofs << key.getstring() << " " << value.getstring() << endl;
#endif
	}

	// 使用cpair* 遍历
	auto p = map_employee.pgetfirstassoc();
	while (p != null)
	{
#ifdef _debug
		ofs << p->key.getstring() << " " << p->value.getstring() << endl;
#endif
		p = map_employee.pgetnextassoc(p);
	}

#ifdef _debug
	ofs.close();
#endif

	cstring value;
	bool ret;
	ret = map_employee.lookup("100", value);   // 查找：未找到返回0
	assert(0 == ret);
	ret = map_employee.removekey("100");       // 删除：不存在返回0
	assert(0 != ret);
	map_employee.removeall();                // 清空

	cdialogex::onok();
}