results.cpp

采用vc++和sql server 2000结合的学生成绩信息管理系统

// Results.cpp: implementation of the Results class.
//
//////////////////////////////////////////////////////////////////////
#include "adodc.h"
#include "datagrid.h"
#include "COMDEF.h"

#include "stdafx.h"
#include "SRMS.h"
#include "Results.h"
#include "ADOConn.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

Results::Results()
{
	Stu_id=0;
	Stu_name="";
	Sex="";
	math=0;
	chinese=0;
	computer=0;
	average=0;
}

Results::~Results()
{

}
void Results::sql_insert(){
	ADOConn m_AdoConn;
	m_AdoConn.OnInitADOConn();
	//设置INSERT语句
	CString strId;
	strId.Format("%d",Stu_id);
	CString strmath;
	strmath.Format("%f",math);
	CString strchinese;
	strchinese.Format("%f",chinese);
	CString strcomputer;
	strcomputer.Format("%f",computer);
	CString straver;
	straver.Format("%f",average);
	_bstr_t vSQL;
	vSQL = "INSERT INTO Results (Stu_id,Stu_name,Sex,math, chinese,computer,average) VALUES('"
		+ strId + "','" + Stu_name + "','" + Sex + "','" + strmath + "','" + strchinese+ "','" + strcomputer+ "'," + straver + ")";
	
	//执行INSERT语句
	m_AdoConn.ExecuteSQL(vSQL);	
	//断开与数据库的连接
	m_AdoConn.ExitConnect();
}
//type=0按姓名查询
//type=1按学号查询
void Results::sql_search(int type,CAdodc *m_adodc,CDataGrid	*m_datagrid){
	_bstr_t vSQL;
	if(type==0){
		vSQL = "SELECT Stu_id AS 学号,Stu_name AS 姓名,Sex AS 性别,math AS 数学,chinese AS 语文,computer AS 计算机,average AS 均分 FROM Results WHERE Stu_name='" + Stu_name+"'";
	}
	else{
		CString strId;
		strId.Format("%d",Stu_id);
		vSQL = "SELECT Stu_id AS 学号,Stu_name AS 姓名,Sex AS 性别,math AS 数学,chinese AS 语文,computer AS 计算机,average AS 均分 FROM Results WHERE Stu_id=" + strId;
	}
	m_adodc->SetRecordSource(vSQL);
	m_adodc->Refresh();
	_variant_t vIndex;
	vIndex = long(0);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(60);
	vIndex = long(1);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(70);
	vIndex = long(2);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(30);
	vIndex = long(3);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(50);
	vIndex = long(4);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(50);
	vIndex = long(5);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(50);
	vIndex = long(6);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(58);
}
void Results::sql_delete(CString cStuId){
	//连接数据库
	ADOConn m_AdoConn;
	m_AdoConn.OnInitADOConn();
	//设置DELETE语句
	_bstr_t vSQL;
	vSQL = "DELETE FROM Results WHERE Stu_id=" + cStuId;
	//执行DELETE语句
	m_AdoConn.ExecuteSQL(vSQL);	
	//断开与数据库的连接
	m_AdoConn.ExitConnect();
}
//type=0按数学
//type=1按语文
//type=2按计算机
//type=3按均分
void Results::sql_order(int type,CAdodc *m_adodc,CDataGrid	*m_datagrid){
	_bstr_t vSQL;
		vSQL = "SELECT Stu_id AS 学号,Stu_name AS 姓名,Sex AS 性别,math AS 数学,chinese AS 语文,computer AS 计算机,average AS 均分 FROM Results ORDER BY ";
	switch(type) {
	case 0:
		vSQL+="math DESC";
		break;
	case 1:
		vSQL+="chinese DESC";
		break;
	case 2:
		vSQL+="computer DESC";
		break;
	case 3:
		vSQL+="average DESC";
		break;
	}
	m_adodc->SetRecordSource(vSQL);
	m_adodc->Refresh();
	_variant_t vIndex;
	vIndex = long(0);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(60);
	vIndex = long(1);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(70);
	vIndex = long(2);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(30);
	vIndex = long(3);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(50);
	vIndex = long(4);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(50);
	vIndex = long(5);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(50);
	vIndex = long(6);
	m_datagrid->GetColumns().GetItem(vIndex).SetWidth(58);
}

void Results::SetId(int vStu_id)
{
	Stu_id=vStu_id;
}

void Results::SetName(CString vStu_name)
{
	Stu_name=vStu_name;
}