/// <summary>
/// 全部学生下机
/// </summary>
/// <returns>是否下机成功！</returns>
public string LoginOutAllStudent()
{
OnLineStudentIDAL onlinestuentIDAL = (OnLineStudentIDAL)fact.CreateUser("OnLineStudentDAL");
DataTable SelectStudentNameTable = new DataTable(); //接收学生姓名
DataTable SelectOnlineStudentTable = onlinestuentIDAL.SelectOnlineStuent(); //获取正在上机的学生信息
string Strms = ""; //返回提示信息
//判断是否有正在上机学生
if (SelectOnlineStudentTable.Rows.Count != 0)
{
//遍历下机
for (int i = 0; i < SelectOnlineStudentTable.Rows.Count; i++)
{
string StudentCardno = SelectOnlineStudentTable.Rows[i][0].ToString();//获取到卡号
//根据上面卡号获取对应姓名
StudentInfo studentName = new StudentInfo();
studentName.StudentCardno = int.Parse(StudentCardno);
SelectStudentNameTable = onlinestuentIDAL.SelectStudentName(studentName); //获取正在上机学生姓名
string StudentName = SelectStudentNameTable.Rows[0][0].ToString(); //姓名
//调用下机方法下机
LoginOutStudentALLBLL loginOutAllStudent = new LoginOutStudentALLBLL();
loginOutAllStudent.LoginOutStudent(StudentCardno, StudentName);//调用下机方法下机
}//end for rows
Strms = "学生已全部下机！";
}
else
{
Strms = "目前没有正在上机学生！";
}
return(Strms);
}
/// <summary>
/// 查询正在上机用户
/// </summary>
/// <returns>以表形式返回所有上机学生信息</returns>
public DataTable SelectOnlineStudent(out string StrMsg)
{
OnLineStudentIDAL onlinestuentIDAL = (OnLineStudentIDAL)fact.CreateUser("OnLineStudentDAL");
DataTable SelectOnlineStudentTable = onlinestuentIDAL.SelectOnlineStuent();//获取正在上机的学生信息
//判断是否有正在上机的学生
if (SelectOnlineStudentTable.Rows.Count != 0)//不等于零说明有正在上机的学生
{
StrMsg = "查询完毕！";
}
else
{
StrMsg = "此时没有正在上机学生！";
}
return(SelectOnlineStudentTable);
}
/// <summary>
/// 指定学生下机
/// </summary>
/// <param name="Cardno">卡号</param>
/// <returns>是否下机成功！</returns>
public string LoginOutAssignStudent(string Cardno)
{
string str = "";
int ToInt = 0;//要转换的类型
//判断卡号是否为空
if (Cardno.Trim() == "")
{
str = "卡号不能为空！";
}
else
{
//判断卡号是否是数字
if (int.TryParse(Cardno, out ToInt))
{
#region 指定学生下机
OnLineStudentIDAL onlinestuentIDAL = (OnLineStudentIDAL)fact.CreateUser("OnLineStudentDAL");
DataTable SelectStudentNameTable = new DataTable(); //接收学生姓名
//根据上面卡号获取对应姓名
StudentInfo studentName = new StudentInfo();
studentName.StudentCardno = int.Parse(Cardno);
SelectStudentNameTable = onlinestuentIDAL.SelectStudentName(studentName); //获取正在上机学生姓名
string StudentName = SelectStudentNameTable.Rows[0][0].ToString(); //姓名
//调用下机方法下机
LoginOutStudentALLBLL loginOutAllStudent = new LoginOutStudentALLBLL();
loginOutAllStudent.LoginOutStudent(Cardno, StudentName);//调用下机方法下机
#endregion
str = "下机成功！";
}
else
{
str = "卡号必须为数字！";
}
}
return(str);
}
